TABLE OF CONTENTS Process - Sonicamcadmin/documents/process/Catalog-Process.pdf · 1050 Hopper...

* This brochure is currently under revision and not available.

1050 Hopper Avenue • P.O. Box 6358 • Santa Rosa, CA 95406 • (707) 544-2706 • (707) 526-9970 Fax Web Page: www.airmonitor.com

Rev. 07/01/04

TABLE OF CONTENTS Process Full Line Catalog

Tab Type Document Name Part Number 1 SUMMARY OF PRODUCTS * Brochure Process Summary of Products ............................................................................................ 121-650 2 EDUCATIONAL MATERIALS Brochure Standards Velocity Traverse of Air Ducts.......................................................................... 125-013 Chart Conversion Chart/Velocity Pressure .................................................................................. 125-080 Bulletin Quench Airflow Measurement (Chemical Fibers)............................................................... IQA-01 Bulletin Quench Airflow Measurement (Chemical Man-made Fiber Production)............................ IQA-02 3 FLOW MEASURING & CONTROL STATIONS Brochure FAN-E Airflow Measuring Stations................................................................................... 125-030 Brochure LO-flo/SS Pitot Traverse Station........................................................................................ 125-030 Submittal FAN-E and LO-flo Minimum Installation Requirements................................................. SUB-H012 Manual Combustion Airflow Measuring Station-Engineering & Design Manual .............................11/97 Form CA Station Ordering Information Sheet........................................................................ ORDER-Q007 4 FLOW MEASURING PROBES Brochure VOLU-probe/SS Stainless Steel Pitot Airflow Traverse Probes ........................................ 125-068 Form VOLU-probe/SS Array Ordering Information Sheet..................................................... ORDER-Q008 Brochure VOLU-probe/SM Airflow Traverse Probes ....................................................................... 125-069 Submittal VOLU-probe/FI-SS Fan Inlet Airflow Traverse Probes .........................SUB-N011,15,13,17,10,14,12,16 Brochure CEM Continuous Emissions Monitoring ........................................................................... 125-491 Form Single Point CEM Systems Ordering Information Sheet ( of 2)......................... ORDER-Q011 Form Single Point CEM Systems Ordering Information Sheet (Page 2 of 2)......................... ORDER-Q012 Form Multi-Point CEM Systems Ordering Information Sheet (Page 1 of 2).......................... ORDER-Q009 Form Multi-Point CEM Systems Ordering Information Sheet (Page 2 of 2).......................... ORDER-Q010 Submittal STACK-probe/SP............................................................................................................. SUB-R009 5 PRESSURE SENSORS Brochure S.A.P. Shielded Static Air Probe........................................................................................ 125-270 Brochure S.O.A.P. Static Outside Air Probe...................................................................................... 125-275 6 ELECTRONIC TRANSMITTER & TRANSMITTER-CONTROLLERS Brochure VELTRON DPT Ultra Low Range Pressure and Flow Transmitter................................... 125-024 Form VELTRON DPT Ordering Information Sheet............................................................... ORDER-Q022 Brochure VELTRON DPT-plus Microprocessor Based Transmitter ................................................. 125-025 Form VELTRON DPT-plus Ordering Information Sheet ............................................... ORDER-Q020 & Q021 Brochure VELTRON II Microprocessor Based Transmitter.............................................................. 125-550 Form VELTRON II Ordering Information Sheet............................................................ ORDER-Q023 & Q024 Brochure VEL-trol II Microprocessor Based Transmitter-Controller ................................................ 125-630 Form VEL-trol II Ordering Information Sheet................................................................ ORDER-Q033 & Q034 Brochure MASS-tron II Microprocessor Based Transmitter.............................................................. 125-005 Form MASS-tron II Ordering Information Sheet............................................................ ORDER-Q018 & Q019 7 ACCESSORY PRODUCTS Brochure AUTO-purge III.................................................................................................................. 125-061 Brochure CAMS Combustion Airflow Management System ......................................................... 125-009 Brochure Airflow Meters ................................................................................................................... 125-105 Submittal Continuous Protective Purge - Flow Transmitter ............................................................. SUB-Q003

STANDARDSVelocity Traverse of Air Ducts

P.O. Box 6358 • Santa Rosa, CA 95406 • TEL 800-AIRFLOW • Fax 707-526-9970 • www.airmonitor.com

These Standards, and others, provide formats for the quantity and positioning of individual velocity measurements. Simply stated, these longestablished Standards recognize that the accuracy of any duct velocity traverse is highly dependent upon the quantity and location of the flowmeasuring points in a duct (or stack) cross-section. Listed below is a summary table of the duct traverse formats set forth in the above standards.In addition, for your referral, we have reproduced portions of the text of the referenced Standards.

Duct (or station) ASHRAE AMCA CODE OFConfiguration HANDBOOK PUBLICATION 203 FEDERAL REGULATIONS

Rectangular25 or more points, maximum 6 inches or 24 or more points, no less than 1 point 9 to 16 minimum, depending on distance to8 inches apart, depending on duct size. per 3 square feet. flow disturbances.

Circular 12 to 30 points, along 2 or 3 diameters. 24 to 48 points, along 3 diameters.8 to 16 minimum, along 2 diameters,depending on distance to flow disturbances.

1993 ASHRAE HANDBOOK

FUNDAMENTALS

I-P Edition

American Society of Heating, Refrigerating and Air-Conditioning Engineers Inc.1791 Tullie Circle, NE

Atlanta, GA 30329

AMCA

FIELD PERFORMANCEMEASUREMENT OF FAN SYSTEMS

Publication 203

Air Movement and Control Association, Inc.30 West University Drive

Arlington Heights, IL 60004-1893

CODE OFFEDERAL REGULATIONS

40 CFR 60, APPENDIX A

Method 1Velocity Traverses for Stationary Sources

Method 2Determination of Gas Velocity and Volumetric Flow Rate

ASHRAE HANDBOOK – 1993 FUNDAMENTALSpublished by the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.

To determine the velocity in the traverse plane, a straightaverage of individual point velocities will give satisfactoryresults when point velocities are determined by the log-Tchebycheff rule (ISO 3966). Figure 6 shows suggested sensorlocations for traversing round and rectangular ducts. Forcircular ducts, the log-Tchebycheff and log-linear traversemethods are similar. Log-Tchebycheff is now recommendedfor rectangular ducts as well. It minimizes the positive error(measured greater than actual) caused by the failure to accountfor losses at the duct wall. This error can occur when using theolder method of equal subareas to traverse rectangular ducts.

For a rectangular duct traverse, a minimum of 25 points shouldbe measured. For a duct side less than 18 inches, locate thepoints at the center of equal areas not more than 6 inches apart,and use a minimum of 2 points per side. For a duct side greaterthan 56 inches, the maximum distance between points is 8inches. For a circular duct traverse, the log-linear rule andthree symmetrically disposed diameters may be used. Pointson two perpendicular diameters may be used where access islimited.

Figure 6 – Measuring Points for Round and Rectangular Duct Traverse

FIELD PERFORMANCE MEASUREMENTS – PUBLICATION 203published by the Air Movement and Control Association, Inc.

Appendix H – Distribution of Traverse Points

The recommended minimum number of traverse points for rectangularducts is indicated below in Figure H-3. For rectangular ducts withcross-sectional areas of 24 square feet and less, the recommendedminimum number is 24. For cross-sectional areas greater than 24 squarefeet, the minimum number of points increases as indicated in FigureH-3. The points are to be located in the centers of equal areas with theareas as nearly square as practical (see Figure H-2). If the flowconditions at the traverse plane are less than satisfactory, the accuracyof the determination of flow rate may be improved by using more thanthe recommended minimum number of points. Fewer points may beused if the flow is very uniform; however, the maximum area coveredper point should not exceed 3 square feet.

Figure H-2. Distribution of Traverse Points for Rectangular Duct

Figure H-3. Recommended Minimum Number of Traverse Pointsfor Rectangular Ducts

InsideDiameterof Duct

Number ofTraversePoints inEach of 3Diameters

Less Than 8Ft.

8 Ft. Thru12 Ft.

GreaterThan 12 Ft.

In order to obtain a representative average velocity in a duct, it isnecessary to locate each traverse point accurately. It is recommendedthat the number of traverse points increase with increasing duct size.The distribution of traverse points for circular ducts, as indicated below,are based on log-linear Pitot traverse method.

Xa = D x Ka

where D is the inside diameter of the duct and Ka is the factor correspondingto the duct size and the traverse point location as indicated in the table below.

Figure H-1. Distribution of Traverse Points for Circular Ducts

K1 K2 K3 K4 K5 K6 K7 K8 K9 K10 K11 K12 K13 K14 K15 K16

8 .021 .117 .184 .345 .655 .816 .883 .978 – – – – – – – –

12 .014 .075 .114 .183 .241 .374 .626 .750 .817 .886 .925 .986 – – – –

16 .010 .055 .082 .128 .166 .225 .276 .391 .609 .724 .775 .834 .872 .918 .945 .990

Figure 1-4. Example showing rectangular stack cross section divided into12 equal areas, with a traverse point at centroid of each area.

125-013 (1/00)

Figure 1-3. Example showing circular stack cross section divided into12 equal areas, with location of traverse points indicated.

Figure 1-2. Minimum number of traverse points for velocity (non-particu-late) traverses.

CODE OF FEDERAL REGULATIONS – 40CFR60 Appendix A, Methods 1 and 2Method 1 – Velocity Traverses for Stationary Sources

Method 2 – Determination of Gas Velocity and Volumetric Flow Rate

Calculating Air Volume. The station air volume, expressed cubic feet per minute (CFM), is the product of the air velocity through the airflowstation and the station area in square feet (Ft2).

Station Air Volume (CFM) = Air Velocity (FPM) x Station Area (Ft2)

CONVERSION CHARTVELOCITY PRESSURE in inches of water to VELOCITY in feet per minute

Calculating Air Velocity. Fechheimer Pitot airflow stations and traverse probes measure in the same manner and magnitude as the Pitot tube,via separate signals of airstream total pressure and static pressure, in inches water column (IN w.c.). To obtain velocity pressure (the forcegenerated by the velocity of the air moving in a duct), the static pressure must be subtracted from the total pressure:

Velocity Pressure (IN w.c.) = Total Pressure (IN w.c.) – Static Pressure (IN w.c.)

Air velocity, expressed in feet per minute, is a function of velocity pressure, converted by means of the following formula:

Air Velocity (FPM) = 1096.5 x Velocity Pressure (IN w.c.)Density of (Gas)

In commercial applications where air is the gas, its density is at 70º Fahrenheit and 29.92 inches of mercury (barometric pressure), and theairflow is not compressed (under 10 IN w.c.), the formula reduces to:

Air Velocity (FPM) = 4005 x Velocity Pressure (IN w.c.)

VP V.001" 127.002" 179.003" 219.004" 253.005" 283.006" 310.007" 335.008" 358.009" 380.010" 400.011" 420.012" 439.013" 457.014" 474.015" 491.016" 507.017" 522.018" 537.019" 552.020" 566.021" 580.022" 594.023" 607.024" 620.025" 633.026" 645.027" 658.028" 670.029" 682.030" 694.031" 705.032" 716.033" 727.034" 738.035" 749.036" 759.037" 770.038" 780.039" 791.040" 801.041" 811.042" 821.043" 831.044" 840.045" 849.046" 859.047" 868.048" 877.049" 887.050" 896.051" 904

VP V1.51" 49211.52" 49381.53" 49541.54" 49701.55" 49861.56" 50021.57" 50181.58" 50341.59" 50501.60" 50661.61" 50821.62" 50981.63" 51141.64" 51291.65" 51441.66" 51601.67" 51751.68" 51911.69" 52061.70" 52221.71" 52371.72" 52531.73" 52681.74" 52831.75" 52981.76" 53131.77" 53281.78" 53431.79" 53591.80" 53741.81" 53881.82" 54031.83" 54181.84" 54331.85" 54471.86" 54621.87" 54771.88" 54911.89" 55061.90" 55211.91" 55351.92" 55501.93" 55641.94" 55791.95" 55931.96" 56081.97" 56231.98" 56371.99" 56512.00" 5664

VP V.102" 1279.103" 1285.104" 1292.105" 1298.106" 1304.107" 1310.108" 1316.109" 1322.110" 1328.111" 1334.112" 1340.113" 1346.114" 1352.115" 1358.116" 1364.117" 1370.118" 1376.119" 1382.120" 1387.121" 1393.122" 1399.123" 1404.124" 1410.125" 1416.126" 1422.127" 1427.128" 1433.129" 1439.130" 1444.131" 1449.132" 1455.133" 1461.134" 1466.135" 1471.136" 1477.137" 1482.138" 1488.139" 1493.140" 1498.141" 1504.142" 1509.143" 1515.144" 1520.145" 1525.146" 1530.147" 1536.148" 1541.149" 1546.150" 1551.151" 1556

VP V.152" 1561.153" 1567.154" 1572.155" 1577.156" 1582.157" 1587.158" 1592.159" 1597.160" 1602.161" 1607.162" 1612.163" 1617.164" 1622.165" 1627.166" 1632.167" 1637.168" 1642.169" 1646.170" 1651.171" 1656.172" 1661.173" 1666.174" 1670.175" 1675.176" 1680.177" 1685.178" 1690.179" 1695.180" 1699.181" 1704.182" 1709.183" 1713.184" 1718.185" 1723.186" 1727.187" 1732.188" 1737.189" 1741.190" 1746.191" 1750.192" 1755.193" 1759.194" 1764.195" 1768.196" 1773.197" 1777.198" 1782.199" 1787.200" 1791.201" 1795

VP V.202" 1800.203" 1804.204" 1809.205" 1813.206" 1818.207" 1822.208" 1827.209" 1831.210" 1835.211" 1839.212" 1844.213" 1848.214" 1853.215" 1857.216" 1862.217" 1866.218" 1870.219" 1875.220" 1879.221" 1883.222" 1887.223" 1892.224" 1896.225" 1900.226" 1905.227" 1909.228" 1913.229" 1917.230" 1921.231" 1925.232" 1929.233" 1933.234" 1937.235" 1941.236" 1945.237" 1950.238" 1954.239" 1958.240" 1962.241" 1966.242" 1970.243" 1974.244" 1978.245" 1982.246" 1987.247" 1991.248" 1995.249" 1999.250" 2003.251" 2007

VP V.252" 2011.253" 2015.254" 2019.255" 2023.256" 2027.257" 2031.258" 2035.259" 2039.260" 2042.261" 2046.262" 2050.263" 2054.264" 2058.265" 2062.266" 2066.267" 2070.268" 2074.269" 2078.270" 2081.271" 2085.272" 2089.273" 2093.274" 2097.275" 2101.276" 2105.277" 2109.278" 2113.279" 2116.280" 2119.281" 2123.282" 2127.283" 2131.284" 2135.285" 2139.286" 2143.287" 2147.288" 2151.289" 2154.290" 2157.291" 2161.292" 2164.293" 2168.294" 2171.295" 2175.296" 2179.297" 2182.298" 2186.299" 2189.300" 2193.301" 2197

VP V.302" 2200.303" 2204.304" 2208.305" 2212.306" 2215.307" 2219.308" 2223.309" 2226.310" 2230.311" 2233.312" 2236.313" 2239.314" 2242.315" 2245.316" 2248.317" 2251.318" 2254.319" 2257.320" 2260.321" 2264.322" 2268.323" 2272.324" 2276.325" 2280.326" 2284.327" 2289.328" 2293.329" 2297.330" 2301.331" 2304.332" 2308.333" 2311.334" 2315.335" 2318.336" 2322.337" 2325.338" 2329.339" 2332.340" 2335.341" 2338.342" 2342.343" 2345.344" 2349.345" 2352.346" 2356.347" 2360.348" 2363.349" 2366.350" 2369.351" 2372

VP V.352" 2376.353" 2379.354" 2383.355" 2386.356" 2389.357" 2393.358" 2396.359" 2400.360" 2403.361" 2406.362" 2410.363" 2413.364" 2416.365" 2420.366" 2423.367" 2426.368" 2429.369" 2433.370" 2436.371" 2439.372" 2443.373" 2445.374" 2449.375" 2453.376" 2456.377" 2459.378" 2462.379" 2466.380" 2469.381" 2472.382" 2475.383" 2479.384" 2481.385" 2485.386" 2488.387" 2491.388" 2495.389" 2499.390" 2501.400" 2533.410" 2563.420" 2595.430" 2626.440" 2656.450" 2687.460" 2716.470" 2746.480" 2775.490" 2804.500" 2832

VP V.51" 2860.52" 2888.53" 2916.54" 2943.55" 2970.56" 2997.57" 3024.58" 3050.59" 3076.60" 3102.61" 3127.62" 3153.63" 3179.64" 3204.65" 3229.66" 3254.67" 3279.68" 3303.69" 3327.70" 3351.71" 3375.72" 3398.73" 3422.74" 3445.75" 3468.76" 3491.77" 3514.78" 3537.79" 3560.80" 3582.81" 3604.82" 3625.83" 3657.84" 3669.85" 3690.86" 3709.87" 3729.88" 3758.89" 3779.90" 3800.91" 3821.92" 3842.93" 3863.94" 3884.95" 3904.96" 3924.97" 3945.98" 3965.99" 3985

1.00" 4005

VP V1.01" 40251.02" 40451.03" 40641.04" 40841.05" 41031.06" 41231.07" 41421.08" 41621.09" 41811.10" 42001.11" 42191.12" 42381.13" 42571.14" 42761.15" 42951.16" 43141.17" 43321.18" 43501.19" 43681.20" 43861.21" 44051.22" 44231.23" 44421.24" 44601.25" 44781.26" 44951.27" 45131.28" 45311.29" 45491.30" 45661.31" 45831.32" 46011.33" 46191.34" 46361.35" 46531.36" 46711.37" 46881.38" 47051.39" 47221.40" 47391.41" 47561.42" 47731.43" 47901.44" 48061.45" 48231.46" 48401.47" 48561.48" 48731.49" 48891.50" 4905

VP V.052" 913.053" 922.054" 931.055" 939.056" 948.057" 956.058" 964.059" 973.060" 981.061" 989.062" 996.063" 1004.064" 1012.065" 1020.066" 1029.067" 1037.068" 1045.069" 1052.070" 1060.071" 1067.072" 1075.073" 1082.074" 1089.075" 1097.076" 1104.077" 1111.078" 1119.079" 1125.080" 1133.081" 1140.082" 1147.083" 1154.084" 1161.085" 1167.086" 1175.087" 1181.088" 1188.089" 1193.090" 1201.091" 1208.092" 1215.093" 1222.094" 1228.095" 1234.096" 1241.097" 1247.098" 1254.099" 1260.100" 1266.101" 1273

125-080 (5/00)


FAN-E AIRFLOW MEASURING STATION.Multi-point, self-averaging, Pitot traverse station with integral air straightener-equalizer honeycomb cell. Capable of continuously measuring fan dischargesor ducted airflow with an accuracy of two percent or better.

AMCA CERTIFIED in accordance with Standard 610.

VOLU-PROBE/1,2,3,4 AIRFLOW TRAVERSE PROBES.Multi-point, self-averaging, Pitot Fechheimer airflow traverse probes withintegral airflow direction correcting design. Four mounting configurationsto fit every application.


VOLU-PROBE/FI FAN INLET AIRFLOW PROBES.Multi-point, self-averaging, Pitot Fechheimer airflow probes with integral airflowdirection correcting design. For mounting directly in the inlet cones or bellmouthof centrifugal or vane-axial fans to measure fan capacities within three percent ofactual flow.

VOLU-PROBE/VS AIRFLOW PROBE TRAVERSE STATIONS.Multi-point, self-averaging, Pitot Fechheimer airflow probes factory mountedin a flanged sheet metal casing, with interconnecting tubing. Capable ofmeasuring ducted airflow within two percent accuracy without using an airstraightener or incurring significant resistance to airflow.


S.A.P./1,2,3 and S.O.A.P. STATIC PRESSURE SENSORS.Available in three separate mounting configurations, the S.A.P. family of staticpressure sensors generate a steady, non-pulsating output of room, space orplenum pressure.

The S.O.A.P. was designed to accurately sense outside atmospheric air pressure.

STAT-PROBE STATIC PRESSURE TRAVERSE PROBE.Multi-point, self-averaging, Fechheimer static pressure traverse probe foraccurate sensing of duct or system static pressure in the presence of turbulentor rotational airflows.

Air Monitor's Product Families of Flow Measurement and Pressure Sensors

QUENCH AIRFLOW MEASUREMENT(Chemical Fibers)

IQA-01

Problem

05/96, Rev.0

The process of manufacturing man-made chemical fibers involves extrudingthe molten material through a die whichhas hundreds of 1 mil holes (20% thethickness of hair), cooling the fiber at aspecific critical rate, and then ropingthe fibers together to produce threadused in manufacturing synthetic fabrics.The equipment that converts the moltenmaterial into fiber is called a spinneretmachine. In the larger fiber manufac-turing facilities there can be as many as400+ spinnerets in operation.

As with all industries, productionthroughput is a major element in main-taining or improving profitability. Withspinnerets running 24 hours per day,improving the throughput by 1% canmean as much as a million dollars per

year added to a plant’s bottom line. Thevolume (plus temperature and humidity)of quench air introduced within eachspinneret machine for cooling is criticalto the process; too little cooling will resultin excessive fiber thinning, and too muchcooling will cause the fiber to becomebrittle and break during the roping process.

The airflow measurement and controlsystems were designed around the LO-floduct air measurement unit, an actuator,damper, and a VEL-trol II transmitter/controller. Each LO-flo was factory testedat three flow rates within a test fixture atAir Monitor’s fabrication facility to ensureextreme accuracy requirements had beenmaintained.

Air Monitor’s Application EngineeringDepartment was called upon to designand manufacture a quench airflowmeasurement and control system thatwould allow the fiber manufacturer todial in the optimum quench air setpointfor the specific fiber being produced. Thissystem was engineered to achieve controlof airflow to within 1% of selectedsetpoint.

Solution

The installed systems provided thecritical airflow control required by thecustomer. Throughputs were increasedto expectation, and production loss dueto inconsistent quench airflow rates waseliminated.

Results

APPLICATION BULLETIN

P.O. Box 6358 t Santa Rosa, CA 95406 t (707) 544-2706 Phone t (707) 526-9970 Fax

IQA-02

QUENCH AIRFLOW MEASUREMENT(Chemical Man-made Fiber Production)

At the top of each draw tower, the moltenresin enters a die ("A") that has multipleholes (see drawing on reverse side).Typically, there are from 100 to 500 fibersdrawn through each die to make up a singlethread; depending on the end product, eachfiber may range from .01" to .0005" inthickness.

The fibers exiting the die are quenchedin multiple stages by airflow ("B") at acritical process rate which is developed,tested, optimized, and specified by thecustomer's R&D/Product Development.Conditioned air for the quenching processis introduced by a fan into the plenum("C").

The plenum's static pressure is measuredby a VEL-trol II Ultra Low DifferentialPressure Transmitter and Single LoopController ("D"), and its controller outputprovides a signal to the fan's variablefrequency drive (VFD). The plenum feedsmultiple (between 8 and 32) draw towers.

From the plenum, air is split into severalflow tubes/ducts, and the airflow in each ismeasured and controlled to a velocitysetpoint. Sets of VOLU-probe/SS airflowmeasurement elements and VEL-trol IIs("E") for each individual duct maintain thedesired airflow velocity by operatingdamper/actuators. Filter loading will occur,which over time affects the velocity,causing the need to modulate dampersettings to maintain the flow velocitysetpoint. Should a different productionresin or fiber thickness be run, calling fora change in the cooling/quench rates, thenthe flow velocity setpoints can quickly bechanged.

Rising toxic gases, released from thefibers during the quenching process, areremoved via that drawer tower's toxicexhaust duct ("F"). The exhaust flow ismaintained at a specific rate usingVOLU-probe/SS airflow measurementelements inserted into the toxic exhaustduct and connected to a VEL-trol II("G"). The VEL-trol II controls thetoxic exhaust fan's VFD to ensure theflow setpoint is maintained. The toxicexhaust contains particulate and resinsthat will require an AUTO-purge IIIsystem ("H") to ensure the VOLU-probe/SS sensing holes are maintained free ofobstruction.

The quench air exhaust ("I") is similarlymeasured and controlled to maintain aspecified flow rate using a VOLU-probe/SS installed in the duct and connected toa VEL-trol II ("J") to modulate thedamper/actuator.

The lower production level needs to bemaintained more positively pressurizedvs outside of the fiber drawing productionarea. In turn, the upper level productionarea has to be maintained more positivelypressurized vs. the lower level. TheVEL-trol II ("K") measures the roompressure on the upper level vs. a reference,and maintains a pressurization setpointby controlling the VFD on the supplyfan. The VEL-trol II ("L") measures theroom pressurization on the lower levelvs. the same reference, and maintains apressurization setpoint by controllingthe VFD on the exhaust fan.

09/97, Rev.0

Industry

Chemical man-made fibers, includingnylon, Dacron, fiberglass, polyester,synthetic wools, etc., used to manu-facture clothing, carpet, printed circuitboards, wire insulation, fiberglass carbodies, tennis ball nap, etc.

AMC Applications

• Quench Airflow Measurement &Control

• Room Pressurization

Need

Starting with molten resin compounds,chemical man-made fibers are formedwhen the resin is drawn through a die,and the resultant fibers are cooled by a"quench air" stream. The finer the fiber,the more accurate the airflow needs tobe controlled to ensure high productyields. Too much airflow will cause thefibers to break; too little airflow and thefiber resin will not solidify, causing it tostretch and break. The airflow quenchingthe fiber must be accurately measuredand controlled, must not be turbulent,and cannot exhibit stratification at theair duct outlet.

Secondly, the purity requirements of thefiber will dictate the level of roompressurization required in order to ensureno contaminates enter the productionarea.

Solution

APPLICATION BULLETIN

1050 Hopper Avenue t Santa Rosa, CA 95403 t (707) 544-2706 Phone t (707) 526-9970 Fax

FAN-EvaluatorAirflow Measuring Station

AIRMOVEMENTAND CONTROLASSOCIATIONINTERNATIONAL, INC. ®

AIRFLOWMEASUREMENT

STATIONAIR

PERFORMANCE

amcaCERTIFIEDRATInGS

The FAN-E is a multi-point, self-averaging Pitot traverse stationwith integral air straightener-equalizer honeycomb cell, capable ofcontinuously measuring fan discharges or ducted airflow with anaccuracy of 2% or better. The FAN-E derives its high degree ofmeasurement accuracy from a combination of precision sensorlocations, honeycomb airflow processing, pneumatic averaging of

a large number of sensed airflow pressures, and patented"symmetrical averaging" (Patent No. 3,685,355), which requiresthat all stages in the averaging process occur at a point where thereis a balanced array of sensors present, thereby assuring that eachsensed pressure is given the same "equal weight" in the averagingprocess as other sensed pressures.

Product Description

FAN-Evaluator

How It Works

Log-Tchebycheff Sensor Location. A high concentration of totaland static pressure sensors positioned according to the log-Tchebycheff rule sense the multiple and varying flow componentsthat constitute the airstream's velocity profile. The log-Tchebycheff'sperimeter weighted sensor pattern is utilized to minimize the positiveerror (measurements greater than actual) caused by the failure toaccount for slower velocities at the duct wall when using traditionalequal area sensor locations. Spacing of total pressure sensors is perASHRAE 1993 Fundamentals Handbook which is summarizedbelow. Since the static pressure across the station is relativelyuniform, a lesser number of static pressure sensors are utilized tominimize unrecovered pressure drop.

Duct / StationConfiguration ASHRAE 1993 Fundamentals Handbook

Rectangular 25 or more points, maximum 6" or 8" apart, depending on duct size.

Circular 12 to 30 points, along 2 or 3 diameters.

Fechheimer Pitot Flow Measurement. The FAN-E operates on theFechheimer Pitot derivative of the multi-point, self-averaging Pitotprinciple to measure the total and static pressure components ofairflow. Total pressure sensing ports with patented (U.S. PatentNo. 4,559,835) chamfered entrances, and Fechheimer pairs of offsetstatic pressure sensing ports combine to minimize the effect ofdirectional airflow. When located downstream of honeycomb airflowprocessing cell, the Fechheimer Pitot method is extremely effectiveat accurately measuring airflow in limited straight duct runs.

Airflow Processing. To assure extremely high levels of measuringaccuracy (2% of actual flow or better) under extreme conditionscaused by turbulent, rotating, and multi-directional airflows normallypresent near fan inlets or discharge ducts and directly downstreamfrom duct elbows, transitions, etc., the FAN-E uses open, parallelcell, honeycomb panels to "process" the air into straightened flowjust prior to the total pressure measurement plane. These honeycombpanels sharply reduce the need for long, straight runs of duct beforeand after the station to obtain accurate flow measurement.

Negligible Airflow Resistance. The FAN-E airflow measuringstation is designed to function while producing a minimum ofresistance to airflow, due to the unique honeycomb air straightener-equalizer section having a free area of 96.6%. The unique, non-restrictive characteristic of the FAN-E is seen in the Resistance vs.Airflow Velocity graph below. The values indicated are totalresistance and do not include any allowances for static regain (apotential 20% reduction to the values).

2% Certified Measurement Accuracy

Air Monitor Corporation certifies that theFAN-Evaluator Airflow Measuring Stationshown herein is licensed to bear the AMCACertified Ratings Seal – Airflow MeasurementStation Performance. The ratings shown arebased on tests and procedures performed inaccordance with AMCA Publication 611 andcomply with the requirements of the AMCACertified Ratings Program.

Performance ratings include the effect of anintegral air equalizer-straightener cell in theAMS.

Test Data

Model. FAN-E and FAN-E/SSType. Differential Pressure

Conversion Formula. Velocity = 1096 AMS Velocity Pressure

Air DensitySizes & Shapes Tested. 36" x 36" Rectangular; 36" dia. CircularApplicable Sizes Rated. Rectangular stations with cross-sectional

areas between 4.5 and 18.0 square feet.Circular stations with cross-sectional areasbetween 3.5 and 14.1 square feet.

Test Setup. AMCA Standard 610, Figure 1

Test Results – Rectangular Stations

AirflowReference Reference % Resistance

Volume, ACFM Velocity, AFPM Accuracy IN w.c.

35,838 3,982 1.72 .29729,689 3,299 1.59 .22524,616 2,735 1.51 .15820,400 2,267 1.14 .08914,434 1,604 0.84 .046

8,629 959 2.08 .021

Test Results – Circular Stations

AirflowReference Reference % Resistance

Volume, ACFM Velocity, AFPM Accuracy IN w.c.

29,141 4,123 0.64 .27224,275 3,434 – 0.17 .20020,176 2,854 – 0.51 .11214,550 2,058 – 0.77 .06710,215 1,445 0.33 .038

8,672 1,227 1.24 .021

AIRMOVEMENTAND CONTROLASSOCIATION

INTERNATIONAL, INC. ®

AIRFLOWMEASUREMENT

STATIONAIR

PERFORMANCE

amcaCERTIFIEDRATInGS

Construction Features

Airflow Measuring Station

90º Connection Flanges

Total and Static Pressure Signal Connection Fittings

Welded 14 Ga.Galvanized Casing

8" Depth (10" for Beaded)

Offset FechheimerStatic Pressure Sensors

Copper Total PressureSensing Manifold

Specifications

Air Equalizer – Straightener Cell.Corrosion resistant 3003 aluminum. 3" deep x 1/2" cell.

Total Pressure Manifold.Copper tubing assembled with 50/50 tin/lead solder.Galvanized mounting and support brackets.

Static Pressure Header and Sensors.Copper tubing. Galvanized mounting bracket.

Connection Fittings.1/4" brass compression type located on the long dimension ofrectangular and flat oval stations.

Special Construction.Casing and Flanges: Aluminum, Carbon Steel, Stainless Steel,

PVC and Fiberglass, Hastelloy, Inconel.Air Equalizer–Straightener Cell: Type 304 and 316 Stainless

Steel, Carbon Steel, PVC, Hastelloy.Total and Static Pressure Manifolds: Type 316 Stainless Steel,

Hastelloy, Inconel, PVC, Kynar.Connection Fittings: Stainless Steel, Hastelloy, Nylon.

Contact the Factory for special construction stations using theabove listed and other materials.

Configurations.Rectangular, Circular, and Flat Oval.

Accuracy.2% of actual flow.

Operating Temperature.Continuous operation to 300ºF.

Casing.Rectangular. 14 gauge galvanized sheet metal, intermittent

welded casing sealed with metal caulking.Circular and Flat Oval. 18 gauge galvanized sheet metal, spot

welded casing seams.

Casing Depth.8" deep for stations with 90º flanges.10" deep, 8" from bead-to-bead for stations with beaded edges.

Flanges.Rectangular. 1-1/2" wide, 90º formed. Sizes up to 144" x 144".Circular and Flat Oval.

Sizes 10" to 24". 1" wide flanges, or beaded edge.Sizes > 24" and < 45". 1-1/2" wide flange.Sizes > 45". 3/16" x 2" bar stock flanges.

Aluminum Honeycomb Air Straightener

Copper Total PressureCentral Averaging Manifold

Note: FAN-E locations shown are not ideal. The locations indicate the minimum clearance required from air turbulence producing sources.Wherever possible, the FAN-E should be installed where greater runs of straight duct (or clearances) than shown below exist.

Minimum Installation Requirements

125-030 (May 2000)

FAN-Evaluator

( )Rectangular Duct: x = Circular Duct: x = Duct Diameter

2 H x W

H + W

The airflow measuring station(s) shall be fabricated of a minimumof 14 ga. galvanized steel, welded casing in 8" depth with 90ºconnecting flanges in a configuration and size equal to that of theduct it is mounted into. Each station shall be complete with an openparallel cell air straightener–equalizer honeycomb mechanicallyfastened to the casing, and external signal connection fittings. Anidentification label shall be placed on each station casing listingmodel number, size, area, and specified airflow capacity.

Stations shall be AMCA certified and be capable of measuring theairflow rates within an accuracy of ±2%. The maximum allowableunrecovered pressure drop caused by the station shall not exceed.085" w.c. at 2000 FPM, or .30" w.c. at 4000 FPM.

The airflow measuring station(s) shall be the FAN-Evaluator asmanufactured by Air Monitor Corporation, Santa Rosa, California.

Suggested Specification

Provide where indicated, airflow measuring station(s) capable ofcontinuously monitoring the fan or duct capacities (air volumes)they serve.

Each airflow measuring station shall contain multiple total and staticpressure sensors positioned in a log-Tchebycheff pattern.Rectangular stations having a cross-section greater than 4 squarefeet will have a minimum of 25 points of measurement. For stationshaving a dimension less than 18", locate the points of measurementat the center of equal areas not more than 6" apart, and use a minimumof two measurement points per side. For a station having a dimensiongreater than 56", the maximum distance between measurement pointswill be 8". For circular ducts having a diameter of 18" or greater,locate measurement points on three systematically disposeddiameters. For round stations smaller than 18", locate themeasurement points on two perpendicular diameters.


2X 1X 3X 1X 2X

CENTRIFUGAL FAN CENTRIFUGAL FAN VANE-AXIAL FAN DISCHARGE VANE-AXIAL FAN INLET DISCHARGE INLET

FANS DAMPERS

ELBOWS TAKEOFFS

DUCT TRANSITIONS

X2

X2

90º VANED ELBOW ROUND SWEEPELBOW

90º UNVANED ELBOW SWEEP ELBOW

1XX2

2X

X2

2X

X2 1X

X2 3X

X2

X2

α

α

α

α

α

α

X2

X2

α

α

α

α

α

LO-flo/SSPitot Traverse Station

LO-flo/SS

The LO-flo Pitot Traverse Station is a combination air equalizer-straightener with self-averaging Pitot tube traverse station. TheLO-flo is fabricated entirely of Type 316 stainless steel with allwelded construction. It is capable of operation up to 1000ºF and issuitable for application to corrosive gases within the limitation ofthe 316 stainless steel construction.

The LO-flo provides highly accurate measurement of low airvolumes of 2 to 2000 CFM for monitoring, indicating, andcontrolling applications when coupled with ultra-low span electronicdifferential pressure or flow transmitters (such as the Air MonitorVELTRON II, MASS-tron II, and VELTRON DPT-plus trans-mitters). See respective product brochures for operating ranges andperformance data.

Product Description

Specifications

Air Equalizer – Straightener Cell.Type 316 welded stainless steel cell.2" deep x ¹/₈" cell for sizes ³/₄" up to 3".3" deep x ¹/₄" cell for sizes 4" up to 8".

Total Pressure Manifold.Type 316 stainless steel tubing.

Static Pressure Chamber.Type 316 stainless steel.

Signal Connections.¹/₄" FPT.

Special Construction.14 ga, 10 ga, and ¹/₄" plate flanges. Integral RTD temperaturesensor and transmitter. PVC, Inconel, Hastelloy, etc., materialsof construction.

Accuracy.2% of actual flow.

Operating Temperature.Continuous operation to 900ºF.

Maximum Static Pressure.20 psig.

Casing.Schedule 5, Type 316 stainless steel pipe.

Casing Depth.12" deep for Models P and F.12" deep plus the depth of two transitions for Models R and FR.See rear cover for detailed dimensions.

Flanges.150 lb. raised face, Type 316 stainless steel for Models F and FR.

How It Works

Equal Area Traverse. Total and static pressure sensors arepositioned so that each sensor represents an equal portion of thestation's cross-sectional area. The total pressure sensors are the onlymeans for sensing the multiple velocity pressures in the airstreamprofile, therefore, a maximum number of total pressure sensors areutilized. Since the static pressure across the station is relativelyuniform, a lesser number of static pressure sensors are utilized.

Equal Weighted Average. The "averaging" process in the airflowmeasuring station manifolds is critical to maintaining highmeasurement accuracy. Unlike a manual Pitot tube traverse whereindividually taken velocity readings are totalled and mathematicallyaveraged, the airflow measuring station must pneumatically averageall of the sensed total pressure values in a manner that gives equalweight to each value. The adjacent figure illustrates how totalpressure sensors are positioned to represent each cross-section equalarea in a balanced pattern to achieve equal weighted averaging.

Airflow Processing. To assure extremely high levels of measuringaccuracy (2% of actual flow or better) under adverse conditionscaused by turbulent, rotating, and multi-directional airflows normallypresent directly downstream from duct elbows, transitions, etc., theLO-flo uses open, parallel cell, honeycomb panels to "process" theair into straightened flow just prior to the total pressure measurementplane. These honeycomb panels sharply reduce the need for long,straight runs of duct before and after the station to obtain accurateflow measurement.


Pitot Traverse Station


Provide at each indicated location a self-averaging Pitot traversestation with integral flow straightener-equalizer for continuousmonitoring of the air volume flow rate in that line.

Each flow traverse station shall contain multiple Pitot total and staticpressure sensors placed at concentric area centers. A flowstraightener-equalizer consisting of an open cell honeycombstructure having a minimum cell size-to-length ratio of 12 to 1 shallbe mounted upstream of the sensors to eliminate all turbulent androtational flows. The Pitot sensors shall be mounted on averaging

manifolds, terminating in external ¹/₄" FPT fittings for signalconnections. The entire flow station assembly shall be fabricatedof Type 316 stainless steel, all welded construction, and be furnishedwith the required [pipe flanges, reducers, weld-in, compressionfittings] for mounting in the indicated lines.

The flow traverse station shall be capable of measuring the airvolume within an accuracy of 2% of actual flow. The station shallbe the LO-flo Pitot traverse station as manufactured by Air MonitorCorporation, Santa Rosa, California.

Note: LO-flo locations shown are not ideal. The locations indicate the minimum clearance required from turbulence producing sources.Wherever possible, the LO-flo should be installed where straight runs exist.


Static Pressure Averaging Chamber

¹/₄" Total Pressure Signal Connection

¹/₄" FPT Static Pressure Signal Connection

Schedule 5 Pipe Casing

150 lb. Raised Face Flange(Models F and FR)

Air Equalizer-Straightener Cell

Model P – Plain Ends Model R – Reducer

Model F – Flanged Ends Model FR – Flanged Reducer

Dimensional Specifications

125-038 (9/97)

LO-flo/SS Pitot Traverse Station

StationNominal

Size

Basic Station Flange Options Reducer Options

GNominal

No. of SensorsAir

VolumeRange,CFM

AreaFactorSq Ft

Straightener/Equalizer

AFlangeSize

ASA 150#Raised Face Pipe

SizeE

FO.D.

TotalPressure

StaticPressure

O.D. I.D. C* D

³/₄"

1"

1¹/₄"

1¹/₂"

2"

3"

4"

5"

6"

8"

1.05

1.32

1.66

1.90

2.38

3.50

4.50

5.56

6.63

8.63

³/₄"1"

1¹/₄"1¹/₂"

1"1¹/₂"2"

1¹/₄"2"

2¹/₂"

1¹/₂"2"

2¹/₂"3"

2"3"

3¹/₂"4"

3"4"5"6"

4"6"8"

5"6"8"

6"8"

8"

.50

.56

.62

.69

.56

.69

.75

.62

.75

.88

.69

.75

.88

.94

.75

.94

.94

.94

.94

.94

.941.00

.941.001.12

.941.001.12

1.001.12

1.12

.920

1.185

1.53

1.77

2.245

3.334

4.334

5.345

6.407

8.407

3.884.254.625.00

4.255.006.00

4.626.007.00

5.006.007.007.50

6.007.508.509.00

7.509.00

10.0011.00

9.0011.0013.50

10.0011.0013.50

11.0013.50

13.50

—1"

1¹/₄"1¹/₂"

—1¹/₂"2"

—2"

2¹/₂"

—2"

2¹/₂"3"

—3"

3¹/₂"4"

—4"5"6"

—6"8"

—6"8"

—8"

8"

—2.02.02.5

—2.53.0

—3.03.5

—3.03.53.5

—3.54.04.0

—4.05.05.5

—5.56.0

—5.56.0

—6.0

6.0

—1.3151.661.90

—1.902.375

—2.3752.975

—2.3752.8753.50

—3.504.004.50

—4.505.5626.625

—6.6258.625

—6.6258.625

—8.625

8.625

1.10

1.10

1.10

1.25

1.25

1.25

1.25

1.25

1.25

1.25

4

4

6

6

8

14

14

14

14

14

4

4

6

6

6

8

8

8

8

8

2 to25

3 to33

5 to70

7 to95

12 to170

24 to340

40 to570

60 to880

90 to1250

150 to2160

¹/₈" x 2"

¹/₈" x 2"

¹/₈" x 2"

¹/₈" x 2"

¹/₈" x 2"

¹/₈" x 2"

¹/₄" x 3"

¹/₄" x 3"

¹/₄" x 3"

¹/₄" x 3"

.0046

.0077

.0128

.0171

.0275

.0606

.1025

.1558

.2239

.3855


SUBMITTAL SHEET

P.O. Box 6358 • Santa Rosa, CA 95406 • (707) 544-2706 • (707) 526-2825 Fax

SUB-H012, Rev. 5 (10/02)

FAN-E and LO-floMINIMUM INSTALLATION REQUIREMENTS

INSTALLATION CONSIDERATIONS. Installation factors to be considered when applying the FAN-E are as follows:

Turbulent Airflow. The unique use of honeycomb airflow straightener in the FAN-E will permit accurate flow measurement in the pres-ence of moderate air turbulence. The distances from air turbulence producing fittings, transitions, etc., shown below in the MinimumRequirements for Installation, are required to assure accurate FAN-E operation.

Airborne Contaminants. The levels of air filtration and cleanliness associated with commercial HVAC Systems, whether supply/return/exhaust/outside air, are satisfactory for operation of the FAN-E. Industrial applications containing airborne contaminants may requireperiodic manual or automatic cleaning using compressed air applied via the signal fittings, and/or physical cleaning.

Direction of Airflow. The FAN-E will function only with the airflow passing through the air straightener section prior to entering the totaland static pressure sensing section. To prevent improper installation, each FAN-E is marked with an arrow indicating the requireddirection of airflow.

MINIMUM REQUIREMENTS FOR INSTALLATION. Note: FAN-E locations shown are NOT ideal. They indicate the minimum clear-ance required from air turbulence producing sources. Wherever possible, the FAN-E should be installed where greater runs of straightduct (or clearances) than shown exist.

2X 1X 3X 1X 2X


FANS DAMPERS

ELBOWS TAKEOFFS

DUCT TRANSITIONS

X2

X2

90º VANED ELBOW ROUNDSWEEP

ELBOW


1XX2

2X

X2

2X

X2 1X

X2 3X

X2

X2

α

α

α

α

α

α

X2

X2

α

α

α

α

α

TRANSITION ANGLE: < -15º TRANSITION ANGLE: < -15º TRANSITION ANGLE: < -15º TRANSITION ANGLE: < -15º


2 H x W

H + W

3.10.2

ENGINEERING & DESIGN MANUAL

For

MODEL CA

Combustion Airflow Measuring Systems

Combustion Airflow Measuring Systems

11/97

MODEL CA - COMBUSTIONAIRFLOW MEASURING STATION

PAGE NO.

AIRFLOW PROCESSING .............................................................................................................. 1

CONSTRUCTION – STANDARD AND OPTIONAL ................................................................... 2

SUBMITTAL SHEETS

• Combustion Airflow (CA) Station - Rectangular ............................................................................. 3• Combustion Airflow (CA) Station - Rectangular w/Sensing Manifold Cleanout Plugs ................... 4• Combustion Airflow (CA) Station - Circular ................................................................................... 5• Combustion Airflow (CA) Station - Circular w/Sensing Manifold Cleanout Plugs ......................... 6• AUTO-purge III ................................................................................................................................. 7• AUTO-purge III - Installation Guide ................................................................................................. 8• AUTO-purge III - Sequence of Operations .......................................................................................... 9

OPERATION & MAINTENANCE ............................................................................................... 10

COMBUSTION AIRFLOW (CA) STATION - DESIGN & INSTALLATION GUIDE ......... 11

VELOCITY VS. RESISTANCE CHART .................................................................................... 12

PHOTOGRAPHS OF STATIONS

• Combustion Airflow (CA) Station - Circular .................................................................................. 13• Combustion Airflow (CA) Station - Rectangular w/Bellmouth ....................................................... 14

TABLE OF CONTENTS


Any physical structure placed across the flow of air in a ductwill impede the flow, the magnitude of which is a function ofthe size and shape of the structure and the quantity of airpassing through it. The Air Monitor air processing stationswere developed to produce a minimum of restriction to airflowby utilizing special open parallel cell honeycomb structureswith free areas of 96% or more. These Air Monitor airprocessing stations perform the basic conditioning functionsof straightening and equalizing the airflow.

The Model CA Combustion Airflow Measuring Station utilizesa 1" cell, hexagonal pattern, parallel cell, heavy duty weldedhoneycomb that functions as a combination air straightenerand equalizer. The 96%+ free area minimizes undesirablepressure drop on the airstream, while the 16 to 1 ratio of

peripheral area of each passage to its cross-sectional areaproduces a slight drag on the passing air. Since the drag orresistance to airflow varies with the square of the air velocity,the higher velocities are reduced while the lower velocities arepermitted to increase. In the illustration below, the arrowsrepresent the velocity magnitude after the air equalizingsection.

The process of air straightening simply removes the rotational,turbulent flow from the airstream, and directionalizes thatairflow while not significantly altering the velocity profile ofair passing through the material. Removal of rotational,multi-directional airflow is essential to the separation andaccurate measurement of the total and static pressures of theairstream.

AIRFLOW PROCESSING

1


STANDARD CONSTRUCTION

Casing. 3/16" carbon steel. Continuous welded seams. Casing depth is 12".

Flanges. Rectangular Stations: 2" wide, 90 degree formed flanges.Circular Stations: 3/16" x 2" barstock or 3/16" plate flanges, fusion welded.

Air Equalizer. 1" hexagonal, parallel cell equalizer-straightener 3" deep. .024" thick (24 ga) carbon steel.

Total Pressure Sensors and Manifold. All fabricated from Type 316 stainless steel, welded construction. Rectangular Stations: Multiple 5/64" I.D. impact sensors on ½" O.D. arms, connected to 1-1/8" O.D. averaging manifolds. Circular Stations: Multiple 5/64" I.D. impact sensors on multiple manifolds that are interconnected for signal averaging.

Manifold sizes on circular stations vary from ½" O.D. to 1" O.D. depending on unit diameter.

Static Pressure Sensors and Manifolds. All fabricated from Type 316 stainless steel, welded construction.

Rectangular and Circular Stations. Multiple 3/64" offset (Fechheimer) sensors on ¾" O.D. averaging manifolds.

Internal Signal Lines. ½" O.D., Type 316 stainless steel tubing welded to sensor manifolds and extended beyond casing exteriorvia ½" stainless steel compression fittings.

Finish. All internal and external black steel parts are provided without any special finish.

Packaging. Assembled station is crated in appropriate plywood and/or composition board over the entire air entering and leavingopenings. Entire unit is crated in dimensional lumber for protection during shipment and storage.

CONSTRUCTION

OPTIONAL CONSTRUCTION

Manual Cleanouts. Each total and static pressure manifold arm is extended through the casing wall and terminates in a femalepipe thread and plug. Removal of the plugs permits cleaning of the manifold interiors with compressed air and/or wire brushing.

AUTO-purge Control Panel. An automatic high pressure air purge system, with valving, delay relays, timer, etc., toautomatically activate a compressed air purge of the mass flow traverse probes at pre-determined time intervals. The systemshall isolate the mass flow transmitter input signal lines, lock the transmitter output signal at the last sensed value, and applyhigh volume, high pressure air to the probe manifold via a permanently connected piped air source to dislodge any particulatebuild-up at the sensor holes, as well as to discharge any accumulated particulate that may have collected in the probe manifold.To maximize the effectiveness of the automatic air purge, each manifold shall be individually purged (one at a time). All valvesand electronic circuitry are mounted in a NEMA 4 enclosure.

Protective Coatings. Two coats of oxide paint primer on casing interior, exterior, and/or air straightener surfaces.

Temperature Sensors. Single or multiple point (depends on unit size) thermocouple or RTD probes can be included in themeasuring station to provide temperature readout and/or thermal adjustment for mass flow. Type, size, and temperature rangeof the thermal probe to be customer or factory specified as required for each application.

NOTE

Alternate special construction requirements such as 1/4" or 3/8" casing thickness, large flanges,alternate materials of construction (Type 316 or 316L stainless steel, hastelloy, etc.) are available.

Contact the factory to discuss any unique or special construction needs.

2

SUBMITTAL SHEET


SUB-Q005, Rev. 3 (7/99)

COMBUSTION AIRFLOW (CA) STATIONRECTANGULAR


Casing. 3/16" carbon steel, continuous welded.Flanges. 2" wide, 3/16" carbon steel formed 90º.Air Straightener. 1" hexagonal cell, 3" deep, 0.022" thick, carbon steel.Total Pressure (T.P.) Manifolds. Type 316 stainless steel.Static Pressure (S.P.) Manifolds. Type 316 stainless steel.Signal Connection Fittings. 1/2" FPT, 316 stainless steel. (Units with more than 24 T.P. sensors require 3/4" FPT.)


1/4" carbon steel casing and formed flanges. Casing and flanges painted with iron oxide primer. Special flanges. Temperature sensor and transmitter capable of 4-20mA output. Factory drilled bolt holes. Bellmouth on air intake side.

DIMENSIONAL SPECIFICATIONS

3.2.4

SUBMITTAL SHEET


SUB-Q008, Rev. 3 (7/99)

COMBUSTION AIRFLOW (CA) STATIONCIRCULAR with Sensing Manifold Cleanout (C.O.) Plugs


Casing. 3/16" carbon steel, continuous welded.Flanges. 2" wide, 3/16" carbon steel, welded to casing.Air Straightener. 1" hexagonal cell, 3" deep, 0.022" thick, carbon steel.Total Pressure (T.P.) Manifolds. Type 316 stainless steel.Static Pressure (S.P.) Manifolds. Type 316 stainless steel.Signal Connection Fittings. 1/2" FPT, 316 stainless steel. (with more than 24 T.P. sensors require 3/4" FPT.)Manual Cleanout (C.O.) Plugs. 3/8" FPT, carbon steel.


¼" carbon steel casing and plate/bar flanges. Casing and flanges painted with iron oxide primer. Special flanges. Temperature sensor and transmitter capable of 4-20mA output. Factory drilled bolt holes. Bellmouth on air intake side.


3.4.2

SUBMITTAL SHEET

P.O. Box 6358 • Santa Rosa, CA 95406 • (707) 544-2706 • (707) 526-2825 Fax • www.airmonitor.com

SUB-M004, Rev. 6 (7/99)

AUTO-purge III


Brass and Copper Construction All wetted tubing, fittings, and valves constructed of copper and/or brass.Enclosure is NEMA 4 painted steel.External connection fittings are stainless steel FPT.

Stainless Steel Construction All wetted tubing, fittings, and valves are constructed of 316 stainless steel.Enclosure is NEMA 4 painted steel.External connection fittings are stainless steel FPT.


NEMA 4X Stainless Steel Enclosure SV-1 / SV-2 Enclosure Heater. Requires 120VAC power supply. 24VAC, 36VA Vortex Cooler. Requires 80-100 psi air supply **. 24VDC, 36VA Continuous Enclosure Purge **. 120VAC, 36VA** These options require a 24 X 24 enclosure.


8.28.2

SUBMITTAL SHEET


SUB-M009, Rev. 5 (8/01)

AUTO-purge IIIINSTALLATION GUIDE

Air Requirement.

80 to 125 psig at 100 CFM, oil and dirt free. 1 to 24 purge cycles per day, with a field selectable duration between 30 and 120seconds during which compressed air is released.

Line Size from AUTO-purge Panel to Flow Measuring Station or Probes.

Distance from AUTO-purge panelto flow measuring station air probe. Tube Size.

< 25' 1/2" S.S. tube25' - 50' 3/4" S.S. tube

> 50' 1.0" S.S. tube

Accumulator Tank (strongly recommended).Requires coalescing filter, pressure regulator, and check valve at the tank inlet.

120 gallons - All CA stations.120 gallons - Multiple VOLU-probes having a combined length greater than 10'.80 gallons - One or more VOLU-probes having a combined length less than 10'.

Line from Accumulator Tank to AUTO-purge Panel.

25' maximum length, ½" pipe (minimum). Recommend locating accumulator tank as close as possible to AUTO-purge panel.

Electrical Power Requirement.

None when used with an Air Monitor transmitter. (NOTE: This adds 36VA to the transmitter's power requirement.)24VAC, 36VA when not initiated by an Air Monitor transmitter.120VAC, 10 amp when an optional enclosure heater is installed.

Ambient Temperature.

40ºF-140ºF. For ranges above or below this ambient temperature, use of panel heater and/or cooler is required.

Purge Frequency.

Once/day minimum, once/hour maximum.

8.30.2

SUBMITTAL SHEET


SUB-M013, Rev. 7 (8/99)

AUTO-purge IIISEQUENCE OF OPERATIONS

IDENTIFICATION CODE

V-1,3 Pneumatically Piloted, 5-Way Valve, Static (low) PressureV-2,4 Pneumatically Piloted, 5-Way Valve, Total (high) PressureSV-1 Solenoid Operated 5-Way ValveSV-2 Solenoid Operated 3-Way ValveHV-1 Supply Air Shut Off ValvePI-1, 2 Gauge, Supply Air Pressure, 0-160 psigTB-2 Terminal Block, Purge Start Command from TransmitterPRV-1/FLTR-1 Pressure Regulator / Filter Assembly

SEQUENCE OF OPERATIONS

Automatic line purging interrupts airflow signal transmission atregular field selectable intervals and purges the station sensinglines with up to 125 psig air for short periods. This periodicpurging assists in maintaining the sensing orifices of the totaland static pressure manifolds in a clean, unobstructed condition.

A selectable timing sequence provided by the smart transmitteractivates solenoid valves (SV-1 and SV-2) which shuttles thetransmitter isolation valves (V3 and V4) and purge valves (V1and V2). A simultaneous output signal hold corresponding to thelast measured input is initiated by the transmitter and maintaineduntil the purge cycle is complete.

When valve V1/V3 and V2/V4 operate, the velocity pressure signallines (C and D) to the flow transmitter are isolated, and highpressure purge air AS1 is routed to the station (probes) sensinglines (A and B). The high pressure purge air cleans the flowsensing orifices of the flow station (probes) during the purgeduration.

At the end of the purge cycle the transmitter withdraws its purgesignal, de-energizing SV-1 and SV-2 and causing valves V3/V4and V1/V2 to reset after a short time delay to their normalposition, thereby reconnecting the process sensing lines to thetransmitter. After a short timed interval the transmitter signal holdis terminated and on-line signal processing resumes.

SCHEMATIC

8.32.2

SYSTEM DIAGRAMMATIC


In addition to being fabricated from durable, corrosion resistant materials, the Model CA Combustion Airflow Measuring Stationhas no moving components or parts that require periodic replacement or calibration. As such, the operation and maintenanceprocedures required for continued operation of the station are extremely limited.

The operating life of the Model CA Combustion Airflow Measuring Station is anticipated to be that of the operating life of theboiler or power facility.

OPERATION & MAINTENANCE

• The Model CA Combustion Airflow Measuring Station hasa built-in air processing section (straightening andequalizing). This enables the station to be installed withoutthe long runs of straight ductwork upstream and downstreamof the station location (as required with the airfoils, otherprobe types, etc.). On new installations, this feature canpossibly reduce ductwork requirements by permitting thedesign to be condensed. Refer to Page 12 to obtain minimumrequirements for installation of the Model CA CombustionAirflow Measuring Stations.

• The air processing section also assures that the automaticaveraging Pitot tube section will sense the duct flowaccurately, within 2 to 3% of the actual flow passing throughthe station and duct. Having no moving parts, the accuracyof the station is basic. It requires no field testing, verification,or periodic calibration.

• The pressure drop, due to the presence of the station in theduct, is extremely low (refer to Page 1). At 2,000 fpm, theresistance to airflow of the Model CA Combustion AirflowMeasuring Station at 70 degrees is only 0.12 IN w.c. Thisis a small fraction of that of airfoils, orifices, etc., and ifproperly correlated back to the fan static requirements andselection, a considerable reduction in fan horsepower andsystem operating static can be made.

• The presence of the air straightener/equalizer section alsobenefits the air pattern downstream of the station. By itselimination of rotational, turbulent airflow it can be of adecided benefit to the air distribution pattern. In applicationswhich are adjacent to the wind boxes (or ductwork take-offto them), this can be a decided help.

• The multiple total and static pressure sensors of the ModelCA Combustion Airflow Measuring Station preclude theunlikely possibility of multiple sensors plugging due toairborne contaminants in the flow stream. However, shouldsome or many of the openings become blocked, the stationwill continue to average the remaining sensors to produce ausable and highly repeatable flow signal.

• In particularly dirty applications or as a result of long termcontamination build-up, one or more of the individualsensors may become plugged. To correct for this problemwithout requiring internal cleaning or sensor manifoldremoval, all Model CA Combustion Airflow MeasuringStations can be equipped with sensor manifold cleanoutports accessible from outside the casing.

• Manual cleaning can be accomplished by removing the endcaps on the sensing manifold(s) and cleaning them by meansof compressed air. Care must be exercised during manualcleaning with the fan system operating since accumulatedcontamination will tend to blow out of the ports of unitsinstalled on the pressure side of the fan.

• Automatic cleaning can be accomplished using the AUTO-purge system, which consists of a series of valves, aprogrammable controller, and an interface with the signaltransmitter/controller contained in a NEMA 4 enclosure. Asource of high capacity 100 psi compressed air must beavailable at the installation site. The purge frequency isdetermined by the contamination level of the operatingsystem and is field set for a frequency range of once per dayto once per month.

10

SUBMITTAL SHEET


SUB-H014, Rev. 3 (3/97)

COMBUSTION AIR STATIONSMINIMUM INSTALLATION REQUIREMENTS

INSTALLATION CONSIDERATIONS. Installation factors to be considered when applying the Combustion Air Station are as follows:

Turbulent Airflow. The unique use of honeycomb airflow straightener in the Combustion Air Station will permit accurate flow measure-ment in the presence of moderate air turbulence. The distances from air turbulence producing fitt ings, transitions, etc.,shown below in the Minimum Requirements for Installation, are required to assure accurate Combustion Air Station operation.

Airborne Contaminants. Industrial applications containing airborne contaminants may require periodic manual or automatic cleaningusing compressed air applied via the signal fittings, and/or physical cleaning.

Direction of Airflow. The Combustion Air Stations will function only with the airflow passing through the air straightener section prior toentering the total and static pressure sensing section. To prevent improper installation, each Combustion Air Station is marked withan arrow indicating the required direction of airflow.

MINIMUM REQUIREMENTS FOR INSTALLATION. Note: Combustion Air Station locations shown are NOT ideal. They indicatethe minimum clearance required from air turbulence producing sources. Wherever possible, the Combustion Air Station should beinstalled where greater runs of straight duct (or clearances) than shown exist.

1X 1.5XX2

ROUND SWEEPELBOW

90º VANEDELBOW

2.5XX2

CENTRIFUGAL FANDISCHARGE

3X

FANS DAMPERS

TAKEOFFS

2.5X

1X

X2

2.5X

1.5XX2

SWEEP ELBOW90º UNVANED ELBOW

X24X

ELBOWS

DUCT TRANSITIONSX2

α

α

X2

α

α

α

α

α

α

α

X2

X2

α

α

α



2 H x W

H + W

3.6.1

MODEL CA - COMBUSTIONAIRFLOW MEASURING STATION CHART

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D H

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D L

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12


Model CA Combustion Airflow Measuring Station

PHOTOGRAPHS

13

ORDERINGINFORMATION

q Place "x" in box to make selection

Prepared By. ______________________________ Customer. __________________________ Date. __________________

Company. ______________________________ Project. __________________________ PF/WO. __________________

Phone No. ______________________________ Tag Info. __________________________ PO. __________________

CA STATION

ORDER-Q007, Rev. 2 (8/97)

DUCT INFORMATION

Material. ___________________________________ Wall Thickness. _____________________________

Inside Dimensions. ____________ W x H ____________ Dia. Max Process Temp. _________ q ºF q ºC

Insulated. q Yes Thickness _______ q External

q No q Internal

CONSTRUCTION INFORMATION

Casing

q 3/16" C.S. (standard)

q 1/4" C.S.

Air Straightener

q 1" x 3" deep, 22 ga, C.S. (std)

q 3/4" x 3", .015", SS

q Other ___________________

Bolt Holes

q None (standard)

q Per Customer Drawing, attached

q AMC Standard

Overall Depth

q 12" (standard)

q Other ___________________

Flange

q 2" (standard)

q Other ____________

Cleanout Ports

q None (standard)

q Required

Manifolds

q Permanent (standard)

q Removable VOLU-probe

Iron Oxide Primer

q None (standard)

q Yes. ______________________

__________________________

Control Dampers

q None (standard)

q Type: ________________________________________________

q Actuator: ___________________

___________________________

Signal Connections

NoteIf AUTO-purge option is selected,

then AMC will determine fitting size.

q 1/2" or 3/4" FPT, SS (standard, based on station size)

q Other: (specify) __________________

Temperature Probe

q None (standard)

q Single Point

q Multi-Point

Temperature Sensor Type

q Single Point RTD, 3 wire, 100Ω Pt

q Thermocouple

Type: q E q K q J

Bellmouth

q None (standard)

q Required

AUTO-purge INFORMATION

AUTO-purge Panel Options

q None (standard) q Upgraded NEMA 4X Stainless Steel Enclosure

q Brass/Copper Construction q Enclosure Heater

q Stainless Steel Construction

VOLU-probe/SSStainless Steel Pitot Airf low Traverse Probes

The VOLU-probe/SS Stainless Steel Pitot Airflow Traverse Probeis ideally suited for new installations or retrofit applicationsrequiring accurate airflow measurement in locations having limitedstraight duct runs. Multiple sets of total and static pressure sensingports along the entire length of the VOLU-probe/SS traverse theairstream in a single line across the duct, and average the sensedpressures in separate manifolds. An array of VOLU-probe/SS

probes are used to properly sense the typically stratified flow toprovide an equal area traverse of an entire duct cross-section. TheVOLU-probe/SS is suited for clean or harsh and particulate ladenapplications, operating at temperatures ranging from –20 to 900ºF.As a primary flow sensing means, the VOLU-probe/SS can be usedin industrial process applications ranging from power generation(combustion airflow), fiber quenching, process drying, emissionmonitoring, etc.

Product Description

VOLU-probe/SS

When installed per Air Monitor's Minimum InstallationRequirements (see back page), the minimum quantity and placementof VOLU-probe/SS airflow traverse probes shown below willproduce assured measuring accuracies of ±2-3% of actual airflow.

Accuracy

All recognized flow measurement standards (ASHRAEFundamentals, AMCA Publication 203, Industrial VentilationManual, 40CFR60, etc.) agree that accurate airflow measurementis highly dependent upon the quantity and pattern of sensing pointsin the airstream, and the relative position of the sensing points toupstream/downstream flow disturbances.

static sensor experiences a lower pressure (Ps – part of Pt) of thesame magnitude, thereby canceling out the undesired effect ofpartial total pressure (Pt). It is this unique design of offset staticpressure and chamfered total pressure sensors (see Figure 1) thatmake the VOLU-probe/SS insensitive to approaching multi-directional, rotating airflow with yaw and pitch up to 30º fromstraight flow, thereby assuring the accurate measurement of thesensed airflow rate without the presence of an airflow straightenerupstream. This unique design of the VOLU-probe/SS is coveredby U.S. Patent No. 4,559,835.

How It Works

The VOLU-probe/SS operates on the Fechheimer Pitot derivativeof the multi-point, self-averaging Pitot principle to measure thetotal and static pressure components of airflow. Total pressuresensing ports, with chamfered entrances to eliminate air directioneffects, are located on the leading surface of the VOLU-probe/SSto sense the impact pressure (Pt) of the approaching airstream (seeFigure 2). Fechheimer pair of static pressure sensing ports,positioned at designated angles offset from the flow normal vector,minimize the error inducing effect of directionalized airflow. Asthe flow direction veers from the normal, one static sensor isexposed to a higher pressure (Ps + part of Pt), whereas the other

Figure 1 Figure 2

The VOLU-probe/1SS is designed for mounting in ducts or stacksby drilling two holes in opposing walls, without the need to enterthose structures.

The VOLU-probe/1SS is furnished with a threaded end support,gasketed washer and nut, and a mounting plate with signal take-offFPT connections, all fabricated of type 316 stainless steel.

VOLU-probe/1SS – Externally Mounted

VOLU-probe/1SS & 2SS

The VOLU-probe/2SS is designed for larger ducts or stacks wherethe size permits entry for installation, or where duct externalaccessibility or clearance is insufficient to permit probe mountingfrom outside the duct.

The VOLU-probe/2SS is furnished with interior mounting and endsupport plates, and midpoint signal take-off FPT connections, allfabricated of type 316 stainless steel.

VOLU-probe/2SS – Internally Mounted

VOLU-probe/SS – Construction Options

VOLU-probe/SS Options

150 lb. Mounting Flange Probe End Supports

Temperature Probe Companion Mounting Plates


Stainless Steel Airflow Traverse Probes

Features

Provides for Equal Area Traverse. Each VOLU-probe/SScontains multiple total and static pressure sensors specifically andprecisely located along the length of the probe to provide an equalarea traverse of ducted airflow. For rectangular duct configurations,the sensors are spaced at equal distances along the probe. Forcircular duct configurations, the sensors are located at the centersof the equivalent concentric area along the probe.

True Velocity Pressure Measurement. The total and staticpressure components of airflow measured by the VOLU-probe/SScan be directly converted in velocity pressure (and velocity) withoutthe use of correction factors, thereby facilitating flow verificationwith a Pitot tube or other hand held instrumentation.

No Sensor Protrusions. The VOLU-probe/SS total and staticpressure sensors are all contained within the confines of the externalsurface of the probe. There are no protruding sensors to be bent,broken, or otherwise damaged during installation or possiblesubsequent removal for inspection or cleaning.

Rugged Construction Assures Long Service Life . The standardVOLU-probe/SS is fabricated from Type 316 stainless steel usingall welded construction. See Page 4 for construction options, andcontact Factory for alternate materials of construction such asHastelloy, Inconel, Kynar, PVC, etc.

No Air Straighteners Required. The VOLU-probe/SS uniquedual offset static pressure sensor and patented chamfered totalpressure sensor design permit the accurate measurement of theairflow rate in highly turbulent flow locations (with directionalyaw and pitch varying up to 30º from the duct's longitudinal axis)without the need for upstream air straightening means.

Offered in Two Models. The VOLU-probe/SS is offered in twobasic configurations to facilitate installation in new or existingducts or stacks; the Model 1 for external mounting, and the Model2 for internal mounting.

Negligible Resistance to Airflow. The VOLU-probe/SScylindrical configuration and smooth surface free of external sensorprotrusions permit the airstream to flow unrestricted around andbetween the installed traverse probes, creating a very minimal, ifnot negligible resistance to airflow (Ex: 0.046 IN w.c. at 2000 fpmair velocity).

Performs Equal-Weighted Averaging of Flow Signals. Throughthe use of separate averaging manifolds, the VOLU-probe/SSinstantaneously averages, on an equal-weighted basis, the multiplepressures sensed along the length of the probe, producing separate"averaged" total pressure and static pressures at the probe's externalsignal connections.

FPT Signal Connections

Offset Fechheimer Static Pressure Sensors

Integral 10 Gauge Mounting Plate

Chamfered Total Pressure Sensors

Note: VOLU-probe/SS locations shown are not ideal. The locations indicate the minimum clearance required from air turbulence producingsources. Wherever possible, the VOLU-probe/SS should be installed where greater runs of straight duct (or clearances) than shown belowexist.


125-068 (1/99)

VOLU-probe/SS


Provide where indicated an array of airflow traverse probes capableof continuously monitoring the stack or duct capacities (air volumes)it serves.

Each airflow traverse probe shall contain multiple total and staticpressure sensors and internally connected to their respectiveaveraging manifolds. The flow sensors shall not protrude beyondthe surface of each probe, and shall be the offset (Fechheimer)type for static pressure and the chamfered impact type for totalpressure measurement. The airflow sensing probe's measurementaccuracy shall not be affected by directional flow having pitch and/or yaw angles up to 30º.

Each airflow traverse probe shall be fabricated of type 316 stainlesssteel, all welded construction, and shall be furnished with the flator curved plate mounting means. In addition, access ports andaccessory hardware shall be provided to facilitate external

installation of the probe and end support (if required), yet permittingeasy probe removal for inspection, etc.

The airflow traverse probe shall not induce a pressure drop in excessof 0.046 IN w.c. at 2000 FPM, nor measurably contribute to soundlevels within the duct. Total and static pressure sensors shall belocated at the centers of equal areas (for rectangular duct) or atequal concentric area centers (for circular ducts) along the probelength. The airflow traverse probe shall be capable of producingsteady, non-pulsating signals of total and static pressure withoutneed for flow corrections or factors, with an accuracy of 2-3% ofactual flow, over a velocity range of 400 to 4000 FPM.

The airflow traverse probe(s) shall be the VOLU-probe [1SS, 2SS]as manufactured by AMC Power, Santa Rosa, California.

3X 1.5X 5X 2X 1X 4X


FANS DAMPERS

ELBOWS TAKEOFFS

DUCT TRANSITIONS

X X1.5X 2 2X 2

2X

90º VANED ELBOW ROUND SWEEP 3XELBOW

X5X 1X 2X 2 3X 1X


1 X

α

α

X 1X 2

X X 1X 2

1X 2


X2

α

α

α

α

α

α α

α

αα


2 H x W

H + W


ORDERINGINFORMATION

Place "x" in box to make selection




VOLU-probe/SS ARRAY

ORDER-Q008, Rev. 2 (8/97)

DUCT INFORMATION

Material. ___________________________________ Wall Thickness. ______________________________

Inside Dimensions. ____________ W x H ____________ Dia. Max Process Temp. _________ ºF ºC

Insulated. Yes Thickness _______ External Location or System Served: ______________________

No Internal

CONSTRUCTION INFORMATION

VOLU-probe Type

1SS External Mounted

2SS Internal Mounted

3SS Insertable/Removable

4SS Self-Supported

Temperature Probe

None (standard)

Single Point

Multi-Point


Single Point RTD, 3 wire, 100Ω Pt

Thermocouple

Type: E K J

Duct Mounting Orientation

Side of Duct.

Duct Dimension ______________

Top of Duct.

Duct Dimension ______________

Companion Mounting Flange

None (standard)

6" x 6"

6" x 6" Extended

End Support Bracket

Standard 3SS Bracket

Y-Shaped - Carbon Steel

Y-Shaped - Stainless Steel

Existing Mounting Port

P Dimension: __________________

Port Pipe Size: __________________

Pipe Schedule: __________________


AUTO-purge Panel Options

None (standard) Upgraded NEMA 4X Stainless Steel Enclosure

Brass/Copper Construction Enclosure Heater

Stainless Steel Construction

Signal Connections

NoteIf AUTO-purge option is selected,

then AMC will determine fitting size.

1/4", 1/2" or 3/4" FPT, SS

(standard, based on probe length)

1/4" Compression Stainless Steel



Other: (specify) __________________

Mounting Gasket

0-200ºF (standard)

200-400ºF

400-900ºF

Mounting Flange

10 ga. Stainless Steel (standard)

4", 150 lb. Raised Face Flange

Optional Standard

VOLU-probe/SMAirflow Traverse Probe

Product Specifications

• Accuracy. ±2%; dependent upon quantity and placement of probesto achieve traverse of ducted airflow.

• Outputs. Averaged signals of static and total pressure.

• Operating Velocity. 100 to 10,000 FPM.

• Directional Sensitivity. Not measurably affected by directionalairflows with pitch and yaw angles up to 30⁰.

• Traverse Pattern. On an equal area basis for rectangular probes.On an equal concentric area basis for circular probes.

• Resistance. Less than 0.1 times the velocity pressure head at probeoperating velocity.

• Construction. All welded construction, utilizing Type 316 stainlesssteel. 10 ga. plate, 1" MPT, or 150 lb. RF flange mounting options.

The VOLU-probe/SM Airflow Traverse Probe is ideally suited fornew installations or retrofit applications requiring accurate flowmeasurement in pipes or small duct locations having limited straightduct runs. The "tube-in-tube" design has multiple total and staticpressure sensing ports along the length of the probe to traverse theairstream in a single line across the duct or pipe, providing

separately averaged pressures at the signal connections. TheVOLU-probe/SM is suited for clean applications, operating attemperatures ranging from –20 to 900⁰F. As a primary flow sensingmeans, the VOLU-probe/SM can be used in industrial processapplications such as fiber quenching, process drying, emissionmonitoring, wastewater treatment, etc.

Product Description

The VOLU-probe/SM locations shown are not ideal. The locations indicate the minimum clearance required from air turbulence producingsources. Wherever possible, the VOLU-probe/SM should be installed where greater runs of straight duct (or clearances) than shown belowexist.



2 H x W

H + W

1X

Downstream of 15⁰ Transition Upstream of 15⁰ Transition

TRANSITIONSX2

X21.5X

90⁰ Vaned Elbow

X22X

Round Sweep Elbow

5X

90⁰ Unvaned Elbow

1X 2XX2

Sweep Elbow

1.5X

Centrifugal Fan Inlet

2X

Vane-Axial Fan Inlet

3X

1X 4X

2X

1X3X

FANS DAMPERS

ELBOWS TAKEOFFS

125-069 (1/00)

VOLU-probe/SM


static sensor experiences a lower pressure (Ps – part of Pt) of thesame magnitude, thereby canceling out the undesired effect ofpartial total pressure (Pt). It is this unique design of offset staticpressure and chamfered total pressure sensors (see Figure 1) thatmake the VOLU-probe/SM insensitive to approaching multi-directional, rotating airflow with yaw and pitch up to 30⁰ fromstraight flow, thereby assuring the accurate measurement of thesensed airflow rate without the presence of an airflow straightenerupstream. This unique design of the VOLU-probe/SM is coveredby U.S. Patent No. 4,559,835.

How It Works

The VOLU-probe/SM operates on the Fechheimer Pitot derivativeof the multi-point, self-averaging Pitot principle to measure thetotal and static pressure components of airflow. Total pressuresensing ports, with chamfered entrances to eliminate air directioneffects, are located on the leading surface of the VOLU-probe/SMto sense the impact pressure (Pt) of the approaching airstream (seeFigure 2). Fechheimer pair of static pressure sensing ports,positioned at designated angles offset from the flow normal vector,minimize the error inducing effect of directionalized airflow. Asthe flow direction veers from the normal, one static sensor isexposed to a higher pressure (Ps + part of Pt), whereas the other

Figure 1

Dimensional and Construction Information


Provide where indicated airflow traverse probe(s) capable ofcontinuous measurement of ducted airflow.

Each airflow traverse probe shall contain multiple forward facingtotal and static pressure sensors, internally connected to theirrespective tube-in-tube averaging manifolds. The flow sensors shallnot protrude beyond the surface of each probe, and shall be theoffset (Fechheimer) type for static pressure and the chamferedimpact type for total pressure measurement. The airflow sensingprobe's measurement accuracy shall not be affected by directionalflow having pitch and/or yaw angles up to 30⁰.

Each airflow traverse probe shall be fabricated of Type 316 stainlesssteel (or Inconel, Hastelloy, etc.), all welded construction, and shall

be furnished with a 10 ga. plate [or 1" MPT, 1"-150 lb. RF flange]mounting means.

Total and static pressure sensors shall be located at the centers ofequal areas (for rectangular duct) or at equal concentric area centers(for circular ducts) along the probe length. The airflow traverseprobe shall be capable of producing steady, non-pulsating signalsof total and static pressure without need for flow corrections orfactors, with an accuracy of 2-3% of actual flow, over a velocityrange of 400 to 4000 FPM.

The airflow traverse probe(s) shall be the VOLU-probe/SM asmanufactured by Air Monitor Corporation, Santa Rosa, California.

Figure 2

SUBMITTAL SHEET


SUB-N011, Rev. 7 (6/00)

VOLU-probe / FI-SSFAN INLET AIRFLOW TRAVERSE PROBE• DOUBLE WIDE, DOUBLE INLET• FAN INLETS LESS THAN 20" IN DIAMETER


Probe. 3/8" tube. Type 316 stainless steel.Mounting Brackets. Type 316 stainless steel.Connection Fittings. 1/4" stainless steel compression type.Operating Temperature. Continuous operation to 900ºF.


4.64.2

SUBMITTAL SHEET


SUB-N013, Rev. 8 (10/02)

VOLU-probe / FI-SSFAN INLET AIRFLOW TRAVERSE PROBE• PLUG FAN• FAN INLETS LESS THAN 20" IN DIAMETER




4.66.2

SUBMITTAL SHEET


SUB-N010, Rev. 7 (6/00)

VOLU-probe / FI-SSFAN INLET AIRFLOW TRAVERSE PROBE• SINGLE WIDE, SINGLE INLET• FAN INLETS LESS THAN 20" IN DIAMETER




4.68.2

SUBMITTAL SHEET


SUB-N012, Rev. 7 (6/00)

VOLU-probe / FI-SSFAN INLET AIRFLOW TRAVERSE PROBE• VANE AXIAL• FAN INLETS LESS THAN 20" IN DIAMETER




4.70.2

CEM SYSTEMSContinuous Emissions Monitoring

The Clean Air Act Amendments of 1990 defined those emissionsources that are subject to the Acid Rain Program provision of theAmendments, and requiring that Continuous Emission Monitoring(CEM) Systems be certified operational by November 15, 1993 forPhase 1 affected units, and by January 1, 1995 for Phase 2 affectedunits.

Virtually every existing emission source in the United States thatfalls under the EPA's Acid Rain Program will have to monitor andreport content and volume of emissions to the atmosphere. The finalversion of 40 CFR 75 imposes stringent monitoring and reportingrequirements, and very complicated certification procedures.

Proposed rules for Enhanced Monitoring (40 CFR Parts 51, 52, 60,61, and 64), Reclaim, and other state level programs are requiring

CEM systems for non-power generating stationary sources. Sourcesmust report the amount of emissions released in addition to thecontent. Therefore, a flow monitoring system may be an integral partof the CEM System.

The process of selecting a flow monitoring system is a difficult onein that it requires consideration of multiple complex factors:

• Will the system meet all certification requirements?• What is the total installed cost?• Serviceability by site personnel.• Overall reliability measured in terms of on-line %.• What ongoing Relative Accuracy Testing Audit (RATA)

frequency will be required (semi-annually or annually)?

Preface

Continuous Emissions Monitoring (CEM) Systems

Background on Continuous Flow Monitoring

The necessity for continuous flow monitoring of the volumetric rateof gaseous emissions into the atmosphere mandated by the Clean AirAct of 1990, as embodied in the Environmental Protection Agency's(EPA) 40 CFR 75 and its application to power generating exhauststacks is relatively new . . . the technology to accomplish it is NOT!

The Process Control and Heating, Ventilating, and Air Conditioningindustries have been utilizing continuous air/gas flow measuringmeans and devices for over 60 years. Admittedly, the initial industryeffort (pre-1970) at continuous air/gas flow measurement had limitedapplications. Utilized were various differential pressure type devices. . . venturis, orifice plates, nozzles, air foils, etc . . . all having thecommon characteristic of inducing extremely high magnitudes of

resistance to flow to the air/gas as it passed through the device. Theapplication for these early, highly restrictive devices were, therefore,limited to air/gas systems which had fans, blowers, etc., capable ofproducing 20 inches of water column (or more) of pressure. It wasnot until 1970 that a non-restrictive device was first introduced andbecame widely used by these industries.

In contrast, over the past 40 years and up to the Clean Air Act of1990, the EPA has based its monitoring procedures on intermittentsampling of air/gas flows . . . the manual taking of air/gas flowmeasurement in conjunction with gaseous sampling on a programmedperiodic basis (once a month, quarter, year, etc.).

generating facilities, is capable of operating in temperatures up to1000°F and contaminated abrasive air (fly ash, coal dust, etc.),replacing the high resistance airfoil station previously used for over40 years in the combustion boiler industry.

Also in the early 1980's, the increasing need to retrofit existing ducts,stacks, etc., with continuous flow monitoring devices prompted thedevelopment of the Pitot-Fechheimer airflow traverse probe utilizingthe Fechheimer offset static sensor. This flow monitoring device isunaffected by turbulent airflow yaw and pitch angles up to 30°. Usedfor duct or stack flow monitoring, it is also widely applied to faninlets to quantitatively measure fan capacities.

Simply stated, Air Monitor was formed specifically to respond to thedevelopment and need for continuous flow monitoring devices, andhas been applying its products to nuclear and fossil fuel process andexhaust (stack) systems for the past 20 years.

In parallel with the development of its continuous flow monitoringdevices, Air Monitor also designed and perfected companion ultra-low differential pressure, flow, and mass flow transmitters. Promptedby the requirements of 40 CFR 75, Air Monitor has extended itsproduct technology by developing transmitter automatic spancapability which, when combined with existing automatic zeroingcapability, has resulted in the first fully self-calibrating transmitter.

Air Monitor Corporation . . . the Continuous Flow Monitoring Pioneer

Air Monitor Corporation was formed in 1970, specifically tomanufacture and promote a flow device now generically referred toas the “Airflow Measuring Station”. Technically described as a“multiple-point, self-averaging Pitot tube airflow traverse array witha built-in air straightener, all contained in a formed metal ductsection”, this device, of which over 1,000,000 have been installedsince 1970, constituted the only means up to 1979 for continuous,instantaneous, and accurate measuring of air/gas flow rates in ducts,stacks, etc., without inducing an excessive resistance to the air/gassystem they served . . . the first non-restrictive continuous flowmonitoring.

In 1973, the airflow station was combined with an isokineticsampling nozzle array. The resulting continuous flow monitoringand isokinetic sampling station, often in conjunction with an isokineticflow control system, has been installed in over 66 nuclear powerfacilities for the continuous flow monitoring and particulate sampleextraction from the vent and exhaust stacks of these facilities. Inaddition, over 8,000 flow stations have been utilized within the airdistribution systems serving those nuclear facilities to accuratelymeasure and control airflow.

In the early 1980's, a flow station suitable for use in measuring theprimary and secondary combustion air in fossil fuel power plantswas developed. This combustion airflow measuring station, ofwhich over 2,000 (with transmitters) have been installed in power

– 2 –

40 CFR 75 Summary

On October 26, 1992, the Environmental Protection Agency (EPA)signed into law Part 75 of the Code of Federal Regulations governingContinuous Emission Monitoring. First proposed in December 1991and subjected to extensive public review, the finalized version of 40CFR 75 follows. The full version of 40 CFR 75 outlines the purpose,standards, certification process, and recordkeeping requirements formonitoring seven emission parameters:

SO2 concentration Opacity

CO2 concentration Volumetric flow

NOx concentration Diluent concentration (O

2 or CO

2)

Moisture concentration

Volumetric Flow Monitoring Systems

Prior to receiving certification by the EPA, a flow monitoring systemmust satisfy continuous emission monitoring requirements via adetailed test procedure to verify that the performance and systemconfiguration is within the EPA mandated requirements relative to:

Measurement LocationInterference CheckCalibration ErrorRelative AccuracyBias

U.S. EPA Requirements for Continuous Emissions Monitoring (CEM)

Bias is a systematic error resulting in measurements that will beconsistently low or high relative to the true flow measurement. Flowmonitors that exhibit the need for low bias will not pass certification.

Flow monitors that exhibit the need for high bias can have themonitor output values adjusted by a single correction factor.

Bias

Relative accuracy for flow monitors cannot exceed 15% throughDecember 31, 1999 for Phase I. In Phase II, beginning January 1,2000, the accuracy requirement is lowered to 10%. Flow monitorswith greater relative accuracies of 10% and 7¹⁄₂% in Phase I andPhase II respectively, are granted a reduction in frequency of RATAtesting to annually. The following chart summarizes the obtainableRATA frequencies.

Correct selection of probe location and quantity, combined withfield calibration prior to certification permits the Air Monitor flowmonitoring system to achieve annual RATA frequencies.

Relative Accuracy

EPA defines an appropriate location for installation of a CEMSystem by referencing 40 CFR 60, Appendix A, Method 1. Thedesired location would be one with a minimum of eight stack or ductdiameters downstream and two diameters upstream of any flowdisturbance. Minimum siting requirements are two downstream

diameters and one-half upstream diameter of any flow disturbances.Provisions are made in 40 CFR 75 to petition the EPA for an alternatemonitoring location when the minimum site requirements cannot bemet.

Measurement Location

Regardless of the technology used to measure flow, all flow monitoringsystems must include a means to insure that the in stack equipmentremains free of obstructions that would affect ongoing measurementaccuracy. For differential pressure flow monitors, the requirement

is for an automatic timed, periodic back purge using compressed airto keep the probe sensing ports clean and expel condensation of wetgases. Air Monitor meets this requirement with its AUTO-purge/CEM System.

Interference Check

Calibration error is calculated as the percentage differential betweena reference value and the actual monitor instrumentation reading.Calibration error must be determined during the certification process,then daily, and periodically thereafter. The daily check of calibrationmust verify that the error has not deviated more than 3.0 percent from

the reference value, with excessive deviation necessitatinginstrumentation recalibration. Air Monitor's instrumentation,consisting of its MASS-tron/CEM transmitter with AUTO-calfunction, provides daily reporting of calibration flow outputs forcalculation of calibration error in the DAS.

Calibration Error

RATA Frequency Requirementsfor Flow Monitoring Systems

Relative Accuracy Required RATA Frequency

Phase 1 Phase 2 Daily Calibration Error Test

15% 10% Semi Annual

10% 7.5% Annual

– 3 –

To assist in complying with the Clean Air Act's stringent emissionmeasurement standards, Air Monitor has assembled a cost effectiveintegrated system, depicted on Pages 6 and 7, consisting of in-stackflow measurement equipment and companion instrumentation to

provide continuous, accurate, and reliable volumetric flow monitoringfor stacks and ducts of any size and configuration. This sectionprovides detailed information on the three major components of AirMonitor's flow monitoring system.

System Components

In-Stack Flow Traverse Probe(s)

Required is the means to accurately monitor the average flow rateand temperature of the stack emissions. Flow rate monitoring isperformed by sensing individual flow components at multiple points(traversing) across one or more diameters for circular stacks or alongmultiple parallel traverses for rectangular stacks, and averaging theobtained values. Average temperature measurement is achievedusing one or more temperature probes to obtain a single full traverseof a stack.

The Air Monitor STACK-probe is an airflow traverse probe basedon differential pressure (Pitot-Fechheimer) technology for measuringairflow; the same technology that will be used during the certificationprocess to verify relative accuracy of the flow monitoring system.Each STACK-probe consists of two separate round tube self-averaging manifolds; one to measure the stack total pressure, and theother to measure stack static pressure. Multiple Pitot-Fechheimerports are positioned on each manifold on an equal area basis (forrectangular stacks) or on an equal concentric area (for circularstacks). Similarly, average stack temperature is measured using atemperature probe with multiple sensing elements spaced along theprobe length.

The engineered truss type design of the STACK-probe utilizestubular structural materials welded to a 6", 150# raised face pipe

flange, permitting cantilever probe mounting in even extremelylarge stacks. Standard Type 316 stainless steel construction insureslong-term durability and continuing accuracy in most installations,with materials such as Hastelloy C22 and Inconel available forextreme temperature and/or severely corrosive applications.Construction details are shown on Page 8.

As a basic instrument, the STACK-probe does not require any initialor periodic calibration to measure flow accurately. As a passivedevice with no moving parts or active electrical circuits, removal ofthe STACK-probe from the stack after installation for repair orcalibration is not required.

Probe Back Purge

Required for differential pressure flow monitoring systems is a backpurging means to insure that the in-stack flow monitor probe has itspressure sensing ports and averaging manifold maintained free ofparticulate build-up and vapor condensation.

When activated by Air Monitor's MASS-tron/CEM or the DataAcquisition System (DAS), the AUTO-purge/CEM Systemsequentially operates a combination of failsafe valves to automaticallyback purge the sensing lines and the STACK-probes with high

volume/high pressure compressed air for a short duration, whilesimultaneously isolating the transmitter from over-pressurization.

Standard AUTO-purge/CEM construction mounts all componentsin a steel NEMA 4 rated enclosure, with all wetted parts made ofcopper or brass. The AUTO-purge/CEM is optionally available in astainless steel NEMA 4X enclosure, with stainless steel wetted partsfor corrosive applications. See Pages 11 and 12 for additionalinformation on the AUTO-purge/CEM System.

– 4 –

AUTO-purge/CEM MASS-tron/CEM

Required is the means to convert the temperature and differentialpressure flow signals received from the in-stack traverse probe(s)into a continuous output signal representing the volumetric flow inSCFM (wet or dry basis) being discharged into the atmosphere.

The Air Monitor MASS-tron/CEM is an ultra-low differentialpressure transmitter with built-in signal conditioning, square rootextractor, and circuitry for temperature and pressure correction ofACFM to SCFM. An integral 2x16 LCD display provides localreadout of stack SCFM and temperature.

To meet the calibration error reporting requirements of 40 CFR 75,the MASS-tron/CEM used in stack flow monitoring applications isequipped with AUTO-cal circuitry. Once every 24 hours, theMASS-tron/CEM executes an AUTO-cal calibration cycle, duringwhich the transmitter output signal is held at the last sensed flowlevel. Sequentially activated valves expose the MASS-tron/CEMtransmitter to reference pressures for zero and span resulting in

corresponding calibration flow outputs, after which the MASS-tron/CEM resumes normal flow monitoring.

In addition to the local display of information, the MASS-tron/CEMprovides outputs to the Data Acquisition System (DAS) for:

Temperature ºF 4-20mADCAUTO-cal Acknowledgment Dry ContactAUTO-purge Acknowledgment Dry ContactSCFM 4-20mADC*Zero Calibration Error Signal 4-20mADC*Span Calibration Error Signal 4-20mADC*

*Serial Output. See Figure below.

The MASS-tron/CEM is available in either a 19" rack mount or aNEMA 4 enclosure, with a NEMA 4X stainless steel enclosureoptionally available. See Page 11 for dimensional specifications.

Flow Monitoring Instrumentation

System Components

Closed

AUTO-cal Relay Contact

Open

20.0mA (100%)

Normal Flow Value 15.2mA (70%)

Flow and AUTO-cal Signals

4.0mA (0%)

T0

T1

T2 T

3 T

4

T0

MASS-tron/CEM internal timer or external dry contact from DAS initiates AUTO-cal cycle. Transmitter output signal forstack flow is held at the last flow value during the AUTO-cal cycle.

T1

AUTO-cal relay contact closes. Zero flow output signal begins.

T2

AUTO-cal relay contact opens. Flow output signal goes to 4mADC.

T3

AUTO-cal relay contact closes. Calibration flow output signal begins.

T4

AUTO-cal relay contact opens. Calibration flow output signal ends. Transmitter returns to reporting actual stack flow.

– 5 –

Single Stack Traverse Schematic

Typical Installation

AUTO-purge/CEM Located on the Stack PlatformMASS-tron/CEM Located in the Instrumentation Enclosure

– 6 –

Dual Stack Traverse Schematic


AUTO-purge/CEM Located on the Stack PlatformMASS-tron/CEM Located in the Instrumentation Enclosure

– 7 –

STACK-probe w/Temperature and Insert Port


– 8 –

In-Stack Probe Configurations


– 9 –

Flow Monitor Probe and Test Port Locations

STACK-probe Locations

– 10 –

AUTO-purge /CEM Panel

Installation Dimensions

MASS-tron/CEM Panel

– 11 –

Air Requirement. 80 to 100 psig at 100 CFM, oil and dirtfree. 1 to 24 purge cycles per day, with a duration of less than2 minutes during which compressed air is released.

Ambient Temperature. 32ºF to120ºF. For ranges above orbelow this ambient temperature, use of panel heater and/orcooler is required.

Purge Frequency. Once/day minimum, once/hour maximum.

Electrical Power Requirement. 120 VAC, 10 amp. (For heaterand/or cooler.)

Line Size from AUTO-purge/CEM to STACK-probe.

Distance from AUTO-purge/CEM Panel to STACK-probe . Tube Size

< 25' ¹⁄₂" S.S. tube25' to 50' ³⁄₄" S.S. tube

> 50' 1" S.S. tube

Accumulator Tank (strongly recommended). Requirescoalescing filter, pressure regulator, and check valve at the tankinlet.

1 stack traverse – 80 gallons2 stack traverses – 120 gallons

Line from Accumulator Tank to AUTO-purge/CEM Panel.25' maximum length, ½" pipe (minimum). Recommend locatingaccumulator tank as close as possible to AUTO-purge/CEMpanel.

Line from AUTO-purge/CEM Panel to MASS-tron/CEM.

Distance Tube Size < 25' ¹⁄₄" S.S. tube25' to 200' ³⁄₈" S.S. tube > 200' ¹⁄₂" S.S. tube

Note: Adequate heat trace of signal lines and drip legs attransmitter end are recommended.

AUTO-purge/CEM Panel

Installation Requirements

Air Requirement. 25 to 120 psig instrument air supply. Per ISAS7.3, required for AUTO-span equipped MASS-tron/CEM.

Ambient Temperature. 60ºF to 80ºF. The MASS-tron/CEM isto be installed within the environmentally controlled analyzerinstrumentation shelter.

Electrical Power Requirement. 120 VAC, 1 amp.

Signal Lines Between the AUTO-purge/CEM Panel andMASS-tron/CEM Panel. Via umbilical; pre-manufacturedumbilical; or stainless steel tubing.

Pressure Test for Leak Check. Test should be performed as perISA Standard RP 7.1, with zero permissible leak tolerance.

Instrumentation (MASS-tron/CEM)

Description. Two ³⁄₈" or ¹⁄₂" O.D. HDPE tubes and one ¹⁄₂" O.D.Teflon PFA tube. Two pair 18 ga., 2 conductor twisted shielded

wire. 70ºC black FR-PE jacket. Five watt/ft. at 120VAC, self-regulating heat trace with tinned copper braid.

Umbilical Specification

– 12 –

Application Data Sheet

Order Entry Information

Prepared By. ______________________________ Customer. __________________________ Date. _______________

Company. ______________________________ Project. __________________________ PF/WO No. _______________

Phone No. ______________________________ Tag Info. __________________________ PO No. _______________

STACK INFORMATION

Single Wall Round Stack Dual Wall Round Stack Single Wall Rectangular Stack

Dimensional Information Insertion Ports with Mating Flanges, Bolts, and Gaskets• I.D. _____________ Provided By Material Size• O.D. _____________ Others (standard) Carbon Steel (standard) 6" (standard)• P _____________ Air Monitor 316SS Other __________• Height _____________ Other __________• Width _____________

PROBE CONSTRUCTION INFORMATION D1 __________D2 __________

Probe Material Bolt Hole Orientation Probe Flange Material 316SS (standard) 316SS (standard) Hastelloy C22 Other ____________ Other ___________

Ambient Temperature Optional Standard • Min ____________

• Max ____________

STACK OPERATING CONDITIONS AND FLUID DATA

Stack Discharge Temperature Average Flue Gas Composition• Maximum ________ºF %H

2O By Volume _____

• Normal ________ºF % By Volume, dry basis% CO _____

Flow Rate % O2

_____• Maximum ______ SCFM Wet Dry % N

2_____

• Normal ______ SCFM Wet Dry % CO2

_____

INSTRUMENTATION/AUTO-purge/CEM ENCLOSURE INFORMATION

Location Outputs In CEM Analyzer Shelter (standard) Per 40 CFR 75 (standard) Other _______________________ Other ______________________

Options Materials of Construction NEMA 4X SS Enclosure Brass/Copper Tubing and Valves (standard) 80 Gallon Accumulator Tank, Vertical SS Tubing and Valves 80 Gallon Accumulator Tank, Horizontal Add AUTO-plug Compressed Air Available Lightening Protection Pressure ______ psig (80 psig minimum required)

UMBILICAL INFORMATION

None With heat trace Without heat trace

Total MustEqual 100%

– 13 –

Reference Installations

125-491 (1/99)

Continuous Emissions Monitoring (CEM) Systems

Saquaro Power CompanyHenderson, NevadaUnits 1 & 2Gas/Coal Fired Cogeneration PlantDual Stack Traverse

Atochem North AmericaHouston, TexasChemical Waste IncineratorDual Stack Traverse

Florida Power & LightSanford PlantFuel: Ore EmulsionDual Stack Traverse

Nucor-Yamoto Steel CompanyBlytheville, ArkansasDual Stack Traverse

AP&C, Inc.Orlando, FloridaGas Fired Cogeneration PlantFour 9' STACK-probes

Public Service of New HampshireBow, New HampshireCoal Fired PlantSingle Traverse, Dual Probes

Pulaski Refuse to Energy PlantBaltimore, MarylandFuel: RefuseSingle Traverse, Dual Probes

James River CorporationBerlin, New HampshireBoilers/Lime KilnsEight StacksSingle & Multiple Traverses

NY State Electric & Gas CompanyCoal Fired PlantSix StacksSingle & Multiple Traverses

Lower Colorado River AuthorityCoal Fired PlantSingle Traverse, Dual Probes

Montana/Dakota PowerCoal Fired PlantTwo 8' x 14" STACK-probesFour 9' x 14' STACK-probes

P.H. GlatfelterSpring Grove, PennsylvaniaSingle Traverse, Dual Probes

Eastern Utilities/Montaup PowerWest Bridgewater, MassachusettsSingle Traverse, Dual Probes

Florida Power & LightOil/Gas Fired PlantsEighteen StacksSingle Traverse, Dual Probes

Texas-New Mexico PowerGalvert, TexasCoal Fired PlantSTACK-probesTwo Stacks

New England ElectricBrayton PointSalem HarborDual Hastelloy ProbesEight Stacks, Single Traverse

Philadelphia Electric CompanyCoal/Oil/Gas Fired PlantsEleven StacksSingle Traverse, Dual Probes

City of Lakeland FloridaMcIntosh Units 1,2,3Units 1,2 Gas Fired; Unit 3 Oil FiredLarsen Units 7,8 Gas FiredHastelloy/Stainless Steel ProbesFour Stacks

B.P. OilToledo, OhioChemical Waste IncineratorTwo HR160 ProbesTwo Stacks, Single Traverse

Northeast UtilitiesBerlin, CTFuel: Oil, Gas, CoalNine Stacks, Dual Traverse

New England Power Co.Manchester Street StationUnits 9, 10, 11Coal Fired PlantThree Stacks, Single Traverse

City Public Service Board ofSan AntonioJ.K. Spruce Unit 1Coal Fired PlantOne Stack, Single Traverse

Taunton Municipal Lighting PlantCleary-Flood Units 8, 9Coal Fired PlantOne Stack, Single Traverse

Prax Air - Union CarbideLiquid NitrogenGas Fired BoilerOne Stack, Single Traverse

Ultramar RefineryOil RefineryTwo Stacks, Single Traverse

Container Corp of AmericaGas Fired BoilersThree Stacks, Single Traverse


ORDERINGINFORMATION





SINGLE-POINT CEM SYSTEMS

STACK INFORMATION

q Single Wall Round Stack q Dual Wall Round Stack q Single Wall Rectangular Stack

Dimensional Information Insertion Ports with Mating Flanges, Bolts, and Gaskets

• I.D. _____________ Provided By Material Size

• O.D. _____________ q Others (standard) q Carbon Steel (standard) q 6" (standard)

• P _____________ q Air Monitor q 316SS q Other _______

• Height _____________ q Other _________

• Width _____________

PROBE CONSTRUCTION INFORMATION

Probe Material Bolt Hole Orientation Probe Flange Materialq 316SS (standard) q 316SS (standard)q Hastelloy C22 q Other ____________q Other ___________

Ambient Temperature q Optional q Standard• Min ____________• Max ____________

D1 __________

D2 __________

Page 1 of 2

ORDER-Q011, Rev. 1 (7/96)

ORDERINGINFORMATION





SINGLE-POINT CEM SYSTEMS

ORDER-Q012, Rev. 1 (7/96)

Page 2 of 2


Stack Discharge Temperature Average Flue Gas Composition• Maximum ________ºF %H

2O By Volume _____

• Normal ________ºF % By Volume, dry basis% CO _____

Flow Rate % O2

_____• Maximum ______ SCFM q Wet q Dry % N

2_____

• Normal ______ SCFM q Wet q Dry % CO2

_____

INSTRUMENTATION/AUTO-purge ENCLOSURE INFORMATION

Location Outputsq In CEM Analyzer Shelter (standard) q Per 40 CFR 75 (standard)q Other _______________________ q Other ______________________

Options Materials of Constructionq NEMA 4X SS Enclosure q Brass/Copper Tubing and Valves (standard)q 80 Gallon accumulator Tank, Vertical q SS Tubing and Valvesq 80 Gallon Accumulator Tank, Horizontalq Add AUTO-plug Compressed Air Availableq Lightening Protection Pressure ______ psig (80 psig minimum required)

UMBILICAL INFORMATION

q Noneq With heat traceq Without heat trace


ORDERINGINFORMATION





MULTI-POINT CEM SYSTEMS

ORDER-Q009, Rev. 2 (8/97)

STACK INFORMATION

Single Wall Round Stack Dual Wall Round Stack Single Wall Rectangular Stack

Dimensional Information Insertion Ports with Mating Flanges, Bolts, and Gaskets

• RAD 1 _____________ Provided By Material Size

• RAD 2 _____________ Others (standard) Carbon Steel (standard) 6" (standard)

• P _____________ Air Monitor 316SS Other _______

• Height _____________ Other _________

• Width _____________

Round Stack - Number of Traverses Rectangular Stack - Number of Traverses

1 (standard) 3 (standard)

Other ______________ Other ______________

PROBE CONSTRUCTION INFORMATION

Probe Material Bolt Hole Orientation Probe Flange Material

316SS (standard) 316SS (standard)

Hastelloy C22 Other ____________

Other ___________

Ambient Temperature Optional Standard

• Min ____________

• Max ____________

Temperature Probe

None

Single Point D1 __________

Multi-Point, half traverse (standard)

D2 __________


Single point RTD, 3 wire, 100 ohm platinum

Type K Thermocouple

Type E Thermocouple

Type J Thermocouple

Page 1 of 2

ORDERINGINFORMATION





MULTI-POINT CEM SYSTEMS

ORDER-Q010, Rev. 1 (7/96)

Page 2 of 2


Stack Discharge Temperature Average Flue Gas Composition

• Maximum ________ºF %H2O By Volume _____

• Normal ________ºF % By Volume, dry basis

% CO _____

Flow Rate % O2 _____

• Maximum ______ SCFM Wet Dry % N2 _____

• Normal ______ SCFM Wet Dry % CO2 _____

TRANSMITTER INFORMATION

Location Optional Functions

In CEM Analyzer Shelter (standard) Add AUTO-plug

Other _______________________ Add Lightning Protection

Mounting Outputs

NEMA 1 Enclosure (standard) Per 40CFR75 (standard)

In 19" Rack Mount, 10.50" High Other ______________________

NEMA 4X Stainless Steel Enclosure


Location Materials of Construction

On Stack-Outdoors Brass/Copper Tubing and Valves (standard)

On Stack-In Annulus or Shelter SS Tubing and Valves

Enclosure Options Compressed Air Available

NEMA 4 Painted CS Enclosure (standard) Pressure ______ psig (80 psig minimum required)

NEMA 4X SS Enclosure

Enclosure Heater for 20ºF to 40ºF Ambient Umbilicals Length

Continuous Enclosure Purge None (standard) N/A

Vortex Enclosure Cooler Main with heat trace ______

Enclosure Heater/Insulation for Ambient Below 20ºF Main without heat trace ______

Accumulator Tank Optional Functions

80 gallons, vertical AUTO-drain

120 gallons, vertical

80 gallons, horizontal

120 gallons, horizontal


SUBMITTAL SHEET


SUB-R009, Rev. 1 (11/98)


Adjustable Flow Sensor. ½" dia. 316 SST tube.Insertion Port Sheath. Hastelloy for protection of SST sensors.Insertion Port Airflow Barrier. Hastelloy disk for 4" Schedule 40 insertion port.Mounting Flange. 4" - 150 lb. raised face (R.F.) pipe flange, 316 SST.Handles. 316 SST.Signal Fittings. ½" compression, SST.

PERFORMANCE SPECIFICATIONS

Flow Coefficient. 0.84Accuracy. When installed in accordance with 40CFR60 Appendix A, accuracy shall be within 40CFR75

specifications.


Probe Material Mounting Flange Size Temperature Probe and Transmitter 316SS (standard) 4" – 150# (standard) 2-wire, 4-20mA, non-isolated, linearized output (standard) Hastelloy 6" – 150#

Temperature Probe TypeBolt Hole Orientation Flange Standoff RTD: Single point, 100Ω, platinum 1-Up 4" (standard) Thermocouple Single Point Multi Point E K J 2-Up (standard) Other: ___________

Temperature Transmitter Type Non-Isolated Output (standard) Isolated Output


STACK-probe / SPTYPE S PITOT FLOW SENSORADJUSTABLE LENGTH

4.10.2

S.A.P.Shielded Static Air Probes

The Air Monitor S.A.P. family of static air probes are designed for room or space pressurization applications where it is essential that thestatic pressure level within a room or space, and that of a reference pressure (corridor, adjacent space, outdoor location, etc.), be accuratelysensed, free of pulsations or effects of air movement in the vicinity of the sensing probe(s). The S.A.P./3 can also be utilized to sense thestatic pressure within fan inlet and discharge plenums or large ducts, where the presence of multi-directional and turbulent airflows prohibitthe use of flow sensitive static pressure tips or probes.

• Integral volume chamber and engineered sensing ports suppressminor room, space or plenum pressure pulsations, providing asteady (non-noisy) static pressure signal.

• Capable of sensing room, space or plenum pressures within 1%of actual static pressure.

• Measurement accuracy is unaffected by airflows up to 1000 FPMfrom a 360º radial source.

• Available in aluminum, or Type 316 stainless steel construction.

• Sensing ports provide self drainage in applications where roomor space washdown is required.

• Available in three mounting configurations:

S.A.P./1 – Surface MountS.A.P./2 – Suspended Mount via ³⁄₄" pipeS.A.P./3 – Recessed Flush Mount

Performance Specifications


Shielded Room and Space Static Pressure Sensor

Provide for each room or space, a shielded static pressure sensorsuitable for surface [recessed flush; suspended; external flush]mounting, complete with multiple sensing ports, pressure impulsesuppression chamber, airflow shielding, and ¹⁄₈" FPT [³⁄₄" FPT (forS.A.P./2)] takeoff fitting, all contained in an aluminum [316 stainlesssteel] casing, with brushed finish on exposed surfaces. These probesshall be capable of sensing the static pressure in the proximity ofthe sensor to within 1% of the actual pressure value while beingsubjected to a maximum airflow of 1000 FPM from a radial source.

The shielded room or space static pressure sensors shall be theS.A.P.[/1,/2,/3] shielded static air probe as manufactured by AirMonitor Corporation, Santa Rosa, California.

Shielded Plenum or Duct Static Pressure Sensor

Provide where indicated for each plenum [duct], two shielded staticpressure sensors suitable for mounting externally on the plenum[duct] wall in opposing positions. The plenum [duct] pressure sensorsshall be complete with multiple sensing ports, pressure impulsesuppression chamber, airflow shielding, and ¹⁄₈" FPT takeoff fitting,all contained in an aluminum [316 stainless steel] casing, withbrushed finish on exposed surfaces. These probes shall be capableof sensing the static pressure of the plenum or duct in the proximityof the sensor to within 1% of the actual pressure value.

The shielded plenum or duct static pressure sensors shall be theS.A.P./3 shielded static air probe as manufactured by Air MonitorCorporation, Santa Rosa, California.

S.A.P. – Shielded Static Air Probes


125-270 (5/00)

Application Examples

S.A.P./1 • Mounting. Surface mount.• Signal Connection. ¹⁄₈" FPT.

Construction / Dimensional Data

S.A.P./2 • Mounting. Suspended mount via ³⁄₄" pipe.• Signal Connection. ³⁄₄" FPT.

S.A.P./3 • Mounting. Recessed flush mount.• Signal Connection. ¹⁄₈" FPT.

S.A.P./3 • Mounting. External flush mount.• Signal Connection. ¹⁄₈" FPT.

S.O.A.P.Static Outside Air Probe

Air Monitor's S.O.A.P. static outside air probe isdesigned for accurate and instantaneous sensing ofoutside static air pressure levels.

To optimize the performance of the S.O.A.P., it mustbe located away from all structures and obstacles ofsufficient size to create a wind induced pressureenvelope. Typical locations are on an elevated positionin an outdoor parking lot, in a below ground recess(landscaped or lawn area), away from buildings, in abelow ground location like a parking garage with non-forced ventilation, or on a rooftop mounted polesufficiently elevated to be outside any anticipated windinduced pressure envelope.

The circular shape of the S.O.A.P. presents a 360º radialentrance for the flow of air (wind) through the sensor.The perforations located on the entering air edges ofthe parallel plates act as a means of diffusing theentering airflow to minimize the effect of non-horizontal flow on the sensor performance, thereby permitting entry flows with approachangles up to 60º from the horizontal without affecting the accuracy of the pressure measurement. The perforations located near the center ofthe bottom plate opposite the signal connection serve to relieve the venturi effect that will develop with higher airflow rates (winds) throughparallel plates, thereby permitting non-pulsating sensing in the presence of high wind gusts. It is the combined action of the above uniquedesign features of the S.O.A.P. static outside air probe that permits it to sense the outside atmospheric air pressure to within 1% of the actualvalue when being subjected to varying horizontal radial wind flows with velocities up to 40 miles per hour and sense within 2% and 3%when subjected to similar wind flows having approach angles up to 30º and 60º to the horizontal respectively.

Product Features

• Sensing accuracy not affected by wind velocities up to 40 milesper hour.

• Perforations on plate edges diffuse the effect of wind approachangles on sensor performance.

• Made entirely of Type 316 stainless steel.

• Mounting via 2" FPT stainless steel connection fitting.

Product Description

• Capable of sensing the outside atmospheric air pressure to within1% of the actual value.

• Unique circular parallel plate design maintains sensing accuracyregardless of flow (wind) direction or pattern.

• Operation not affected nor impaired by rain or snow.

• Construction has no moving parts nor required maintenance.

S.O.A.P. Static Outside Air Probe

125-275 (5/00)

The Need for a Stable, Common Pressure Reference

For the accurate measurement and/or control of room, laboratory,space, or building pressurization, it is essential that these sensedpressure levels be referenced to a common pressure. Ideally, thatreference is the outdoors. But the usual outdoor sensor, because ofits design, has to be shielded from the wind, and often ends up

located where it will be subjected to the pressure envelope developedby the wind's effect upon the building, refer to the following figure.The magnitude of the pressure envelope that can be created byvarious wind velocities is also shown below.

Dimensional Specification


Provide for the room or space static pressure indicating or controllingsystems an outdoor static pressure sensor constructed of 10 ga. Type316 stainless steel with a 2" diameter FPT connection.

The outdoor air probe shall be capable of sensing the outsideatmospheric air pressure to within 2% of the actual value when

subjected to radial wind velocities up to 40 miles per hour withapproach angles up to 30º to the horizontal.

The static outside air probe shall be the S.O.A.P. as manufacturedby Air Monitor Corporation, Santa Rosa, California.


WIND VELOCITYMILES PER HOUR

UPWIND SIDEINCHES W.C.

DOWNWIND SIDEINCHES W.C.

10 0.035 – 0.015

15 0.088 – 0.025

20 0.14 – 0.050

25 0.22 – 0.065

30 0.30 – 0.090

35 0.42 – 0.125

40 0.54 – 0.180

45 0.70 – 0.260

50 0.85 – 0.340

55 1.06 – 0.425

60 1.28 – 0.540

65 1.70 – 0.700

VELTRON DPTUltra-Low Range

Pressure & Flow Transmitter

IndicationDisplay.

Optional 3¹⁄₂ digit LCD.

Input/OutputInput.

Differential pressure (high and low).

Output.4-20mADC, linear to pressure or flow (requires optionalsquare root function).

PowerPower Supply.

14-40VDC. Two wire basic configuration.

Load Limitations.

Circuit Protection.Power input is reverse polarity protected.

TransmitterType.

Differential Pressure, Flow

Accuracy.±0.5% of Natural Span, including non-linearity, hysteresis,deadband, and non-repeatability.

Ranges. Natural Spans Bi-Polar Natural Spans0 to 25.00 IN w.c.0 to 10.00 IN w.c. –10.00 to 10.00 IN w.c.0 to 5.00 IN w.c. – 5.00 to 5.00 IN w.c.0 to 2.00 IN w.c. – 2.00 to 2.00 IN w.c.0 to 1.00 IN w.c. – 1.00 to 3.00 IN w.c.0 to 0.50 IN w.c. – 0.50 to 0.50 IN w.c.0 to 0.25 IN w.c. – 0.25 to 0.25 IN w.c.0 to 0.10 IN w.c. – 0.10 to 0.10 IN w.c.

Stability.±0.5% of Natural Span for six months.

Vibration Effect.±0.05% of Natural Span/5G to 60 Hz.

Temperature Effect.Zero. 0.015% of Natural Span/⁰F.Span. 0.015% of Natural Span/⁰F.

Mounting Position Effect.Zero shift only; corrected through transmitter manualzeroing.

Span and Zero Adjustment.Via multi-turn potentiometers located inside the fieldwiring end cap.

Zero Elevation and Suppression.Maximum zero elevation. 100% of calibrated span.

Requires an optional bi-polar transducer.Maximum zero suppression. 60% of calibrated span.

Damping.Standard. 1.25 seconds to 98% Full Span step.Adjustable. 0.25 to 10 seconds via socketed resistor.

Overpressure and Static Pressure Limit.25 psig.

Temperature Limits.–20 to 180⁰F Storage.+32 to 140⁰F Operating.

Humidity Limits.0-95% RH, non-condensing.


VELTRON DPT

GND

14 to 40 VDCPOWER SUPPLY

EARTHGROUND

XMITZERO

XMITSPAN

LOAD


Ultra-Low Differential Pressure & Flow Transmitter

Accuracy. The VELTRON DPT is designed to maintain an accuracyof ±0.5% of Natural Span. For a span of 0 to 0.10 IN w.c., this isequivalent to an output accuracy of ±0.0005 IN w.c. differentialpressure or ±6.33 FPM velocity.

Primary Signal Noise Filter. To eliminate background noise andpulsations from the flow signal, the VELTRON DPT is equippedwith a user selectable low pass filter.

Square Root Function (optional). When equipped with the squareroot option, the VELTRON DPT can provide an output signal linearto velocity or volume.

High Turndown Ratio Operation. The VELTRON DPT, with itshigh level of accuracy, can maintain linear output signals onapplications requiring velocity or pressure turndown of 5 to 1.

Continuous Display of Process (optional). The VELTRON DPTcan be equipped with a 3¹⁄₂ digit LCD display to provide acontinuous readout of the measured process in engineering units(Inches w.c., SCFM, lbs/hr, etc.).

Hazardous Locations. The VELTRON DPT is Factory Mutualand CSA approved for the following:

• Explosion Proof: Class 1, Division 1, Groups B, C, D.• Dust Ignition Proof: Class II, III, Division 1, Groups E, F, G.• Suitable for indoor and outdoor NEMA Type 4X hazardous

locations.

Enclosure. The VELTRON DPT is packaged in a NEMA Type 4Xenclosure with standard industrial process connections.


Optional3¹⁄₂ digitLCD Display

6.75(Max)

4.50(Max)

Locknut

Calibration Port

5.40(Max)

³⁄₄-14 NPTconduitconnections(2 places)

NEMA 4XField wiringend.

High port¹⁄₄-18 NPT

for pressureconnection

Low port¹⁄₄-18 NPTfor pressureconnection

Process Connections. Industry standard ¹⁄₄"-NPT ports on 2¹⁄₈"centers on bottom of base.

Electrical Connections. Dual ³⁄₄" conduit connections.Terminal strip for field wiring and test points.

Electrical Enclosure. NEMA Type 4X aluminum body withNeoprene gaskets.

Physical Specifications

O-Rings. BUNA N.

Paint. Polyurethane with epoxy primer.

Mounting. Flat and angle mounting brackets for 2" pipe.

Weight. 9.4 lbs.

125-024-00 (1/00)

VELTRON DPT

Mounting Configurations with Optional Brackets


The transmitter shall be capable of receiving flow signals (totaland static pressure) from an airflow station or probe array, andproduce an output linear and proportional to static or velocitypressure.

(Optional) The transmitter will include a means of performing aninternal square root of the process signal to provide an output signallinear to velocity or volume.

(Optional) The transmitter shall contain an integral LCD capableof indication of the process during normal operating mode.

The transmitter will be available in multiple Natural Spans coveringthe range of 0.10 IN w.c. to 10.0 IN w.c. with an accuracy of ±0.5%of Natural Span. The transmitter shall be capable of maintaininglinear output signals on applications requiring 5 to 1 velocity orpressure turndown.

The transmitter shall be the VELTRON DPT as manufactured byAir Monitor Corporation, Santa Rosa, California.


Mount to Horizontal Channel

Mount to Flat Surface

Angle Mount to Horizontal Pipe Vertical Mount to Horizontal Pipe

Vertical Mount to Vertical Pipe

Note: Mounting bracket kit includes³⁄₈-16 U-bolt, nuts, and washers for2" Schedule 40 pipe, plus 4 bolts andwashers to attach the transmitter to themounting bracket.

ORDERINGINFORMATION





VELTRON DPT

ORDER-Q022, Rev. 6 (3/01)

APPLICATION - INDUSTRIAL (Either Differential Pressure Measurement or Flow Measurement – Check only one)

q Differential Pressure Measurement such as duct, room or space pressure.

Minimum __________ Units:

Normal __________ Transmitter Span: _________ to _________ q IN w.c. q Pascals

Maximum __________ q mm of w.c. q Other: ________________

q Flow Measurement. If Differential Pressure Measurement is checked above, skip this section.q Volumetric Flow Measurement. Flow rate measured for actual process conditions.q Mass Flow Measurement.q Volumetric Flow Measurement. Flow rate measured is converted to standard conditions (68ºF, 29.921" Hg).

Note: Unless otherwise noted below, AMC will add 10% to the max. flow rate given below for transmitter full span.

Flow Rate Temperature Duct Static Pressure MediaMinimum __________ Minimum __________ Minimum __________ q Air. (0.07513 lbs/ft3)

Normal __________ Normal __________ Normal __________ q Gas. _________________

Maximum __________ Maximum __________ Maximum __________Gas Density at 68ºF & 29.921" Hg

Units.q Lbs/Hr q NM3/H q Kg/Hr Units. Units.q ACFM q SCFM q Other _____ q ºF q IN w.c. ________ lbs/ft3

q Do not add 10% q ºC q Other ____________

Site Elevation: ____________________ OR Average Barometric Pressure: ____________________IN Hg.

FLOW SENSING ELEMENT

q Air Monitor Station/Probeq Other. If checked, provide flow rate vs. ∆P formula.

DENSITY COMPENSATION. Skip this section if Differential Pressure Measurement Application is checked above.

qNot required. Use above specified density for transmitter span calculation.

qDensity Compensation performed in DCS by others. If checked, transmitter display and output will be IN w.c. for the above processconditions. Square root will be turned OFF.qSingle Point Correction in VELTRON DPT: Average Operating Temperature ________ºF

Average Operating Static Pressure ________ IN w.c.

Page 1 of 1

Formula

This form must be completed inorder to process your order.

CALIBRATION CERTIFICATE

qNone (standard)

qNIST Traceable FactoryCalibration Certificate

VALVE MANIFOLD

qNone (standard)

q 3 Valve, S.S.

q5 Valve, S.S.

DISPLAY

qNone (standard)

q3-1/2 digit LCD (only

displays process variable)

ID TAG

qNone (standard)

q2" x 4" S.S. wired on tag

VELTRON DPT-plusMicroprocessor Based Ultra-Low RangePressure & Flow "Smart" Transmitter

The VELTRON DPT-plus transmitter is furnished with anautomatic zeroing circuit capable of electronically adjusting thetransmitter zero at predetermined time intervals while simul-taneously holding the transmitter output signal.

The automatic zeroing circuit eliminates all output signal drift dueto thermal, electronic or mechanical effects, as well as the need forinitial or periodic transmitter zeroing. For transmitters operatingin a moderately steady temperature location (thus no thermally

with Automatic Zeroing Circuit

VELTRON DPT-plus

Indication

Display. A backlit, graphical LCD providing three lines of datadisplay. Also used for programming.

Inputs/Outputs

Analog Inputs. Differential pressure (high and low), and 4-20mA,2-wire, internally or externally loop powered temperature signal.

Analog Outputs. Dual 4-20mA outputs, individually configurableas internally powered/non-isolated, or externally powered/isolated.

Digital Inputs. Digital contacts for AUTO-purge external start.

Digital Outputs. Dual Form A dry contacts rated for 3 amps at24VAC/VDC for optional HI/LO alarm; or dual Form A dry contactsfor AUTO-purge activation and acknowledgment.

Temperature Compensation Selection. Pushbutton selection oflinearized or non-linear temperature transmitter input for thefollowing temperature sensing types:

Type E –50 to 1750⁰F –50 to 950⁰C

Type T –50 to 750⁰F –50 to 400⁰C

Type J –50 to 2000⁰F –50 to 1090⁰C

Type K –50 to 2000⁰F –50 to 1090⁰C

RTD –50 to 1500⁰F –50 to 815⁰C

PowerPower Supply.Standard 24VAC (20-28VAC) or 24VDC (20-40VDC).Optional 120VAC (100-132VAC), via external transformer.

Power Consumption.Standard: 18VA at 24VAC; 13VA at 24VDC; 36VA at 120VAC.With AUTO-purge Management: 54VA at 24VAC; 48VA at

24VDC; 108VA at 120VAC.

Circuit Protection. Power input is fused and reverse polarityprotected.

Transmitter

Accuracy. 0.1% of Natural Span, including hysteresis,deadband, non-linearity, and non-repeatability.

Type. Differential pressure, flow, and mass flow.

Ranges. Natural Spans Bi-Polar Natural Spans0 to 25.00 IN w.c.0 to 10.00 IN w.c. –10.00 to 10.00 IN w.c.0 to 5.00 IN w.c. – 5.00 to 5.00 IN w.c.0 to 2.00 IN w.c. – 2.00 to 2.00 IN w.c.0 to 1.00 IN w.c. – 1.00 to 1.00 IN w.c.0 to 0.50 IN w.c. – 0.50 to 0.50 IN w.c.0 to 0.25 IN w.c. – 0.25 to 0.25 IN w.c.0 to 0.10 IN w.c. – 0.10 to 0.10 IN w.c.0 to 0.05 IN w.c. – 0.05 to 0.05 IN w.c.

Span Rangeability. The calibrated span can be down ranged to40% of the Natural Span.

Stability. ±0.5% of Natural Span for six months.

Temperature Effect. Zero. None; corrected by AUTO-zero.Span. 0.015% of Natural Span/⁰F.

Mounting Position Effect. None; corrected through transmitterautomatic zeroing.

Span and Zero Adjustment. Digital, via internally locatedpushbuttons.

Low Pass Filtration. Response time to reach 98% of a stepchange is adjustable from 2.0 to 250.0 seconds.

Overpressure and Static Pressure Limit. 25 psig.

Automatic Zeroing.Accuracy. Within 0.1% of calibrated span.Frequency. Every 1 to 24 hours on 1 hour intervals.

Temperature Limits.–20 to 180⁰F Storage; +32 to 140⁰F Operating.

Humidity Limits. 0-95% RH, non-condensing.


induced span drift), this automatic zeroing function essentiallyproduces a "self-calibrating" transmitter. The automatic zeroingcircuit will re-zero the transmitter to within 0.1% of its operatingspan; for a transmitter with a 0.02 IN w.c. operating span, thisrepresents a zeroing capability within 0.00002 IN w.c.

To permit manual calibration of the VELTRON DPT-plus, anelectronic switch is provided to permit manual positioning of thezeroing valve.


Ultra-Low Differential Pressure & Flow "Smart" Transmitter

Accuracy. The VELTRON DPT-plus is designed to maintain anaccuracy of 0.1% of Natural Span. For a span of 0 to 0.05 IN w.c.,this accuracy is equivalent to an output accuracy of ±0.00005 INw.c. differential pressure or ±0.90 FPM velocity.

Microprocessor Based Functionality. The VELTRON DPT-pluson-board microprocessor performs the functions of operatingparameter selection, transmitter configuration, input/output anddisplay signal scaling, and transducer calibration. Imbeddedsoftware performs span, flow, and 3-point "K" factor calculations.Input to the microprocessor is via pushbuttons.

Electronic Respanning. The VELTRON DPT-plus operating spancan be electronically selected anywhere between the Natural Spanand 40% of Natural Span, without having to perform recalibrationinvolving an external pressure source.

Air Density Correction. The VELTRON DPT-plus is capable ofaccepting a process temperature input to perform density correctionto volumetric or mass flow. Temperature input is a 4-20mA signalfrom a remote temperature transmitter; non-linear temperatureinputs can be linearized by the microprocessor. Temperature sensortype is software selectable from the following choices:Thermocouple types E, T, J, and K; or Platinum RTD.

High Turndown Ratio Operation. The VELTRON DPT-plus,with its high level of accuracy and automatic zeroing circuitry, canmaintain linear output signals on applications requiring velocityturndown of 10 to 1 (equal to a velocity pressure turndown of 100to 1).

Features

Continuous Display of Process. The VELTRON DPT-plus comesequipped with a multi-line, backlit, graphical LCD for use duringtransmitter configuration and calibration, and to display multiplemeasured processes in engineering units. The LCD provides oneline having 8 digits with double wide and double high characters,two 20 digit lines having standard size characters, and variousdescriptors for transmitter operating status.

Primary Signal Noise Filter. To eliminate background noise andpulsations from the flow signal, the VELTRON DPT-plus has auser selectable low pass digital filter.

AUTO-purge Management (optional). For "dirty air" applicationsrequiring the use of an Air Monitor AUTO-purge system, theVELTRON DPT-plus provides the capabilities of establishing purgefrequency and duration while giving the user a choice of eitherinternally timed cycle frequency or externally triggered purgeinitiation. During the purge cycle all transmitter outputs aremaintained at their last value prior to the start of the purge cycle.

Hazardous Locations. The VELTRON DPT-plus is FactoryMutual and CSA approved for the following:• Explosion Proof: Class 1, Division 1, Groups B, C, D.• Dust Ignition Proof: Class II, III, Division 1, Groups E, F, G.• Suitable for indoor and outdoor NEMA Type 4X hazardous

locations.

Enclosure. The VELTRON DPT-plus is packaged in a NEMA 4Xenclosure with standard industrial process connections.

High port ¹⁄₄–18 NPTfor pressure connection

³⁄₄–14 NPT conduitconnections (2 places)

NEMA 4XField wiringend

Low port ¹⁄₄–18 NPTfor pressure connection

7.88(Max)

2¹⁄₈

6.75(Max)

4.50(Max)

Standard LCDGraphical Display

Locknut

Calibration Port

Process Connections. Industry standard ¹⁄₄"-NPT ports on 2¹⁄₈"centers on flanges. ¹⁄₂"-NPT ports on bottom of base.

Electrical Connections. Dual ³⁄₄" conduit connections. Terminalstrip for field wiring and test points. External terminal strip withplug-in connectors.

O-Rings. BUNA N.


Electrical Enclosure. NEMA 4X aluminum body withNeoprene gaskets.

Paint. Polyurethane with epoxy primer.

Mounting. Flat and angle mounting brackets for 2" pipe.

Weight. 10.5 lbs.

125-025-00 (1/00)

VELTRON DPT-plus


The mass flow transmitter shall be capable of receiving flow signals(total and static pressure) from an airflow station or probe arrayequipped with a temperature sensing means, internally performdensity correction for the process temperature, and produceindividual outputs linear and scaled for standard air volume ormass flow, and temperature.

The mass flow transmitter shall contain an integral graphic LCDfor use during the configuration and calibration process, and becapable of indicating multiple process parameters (temperature,flow, dp, etc.) during normal operating mode. All transmitterparameter setting, zero and span calibration, and display scalingwill be performed digitally in the on-board microprocessor via inputpushbuttons.

The mass flow transmitter will be available in multiple naturalspans covering the range of 0.05 IN w.c. to 10.0 IN w.c. with an

accuracy of 0.1% of natural span. The transmitter shall be furnishedwith a transducer automatic zeroing circuit and be capable ofmaintaining linear output signals on applications requiring 10 to 1velocity (100 to 1 pressure) turndown. The transmitter shall becapable of having its operating span electronically selected withouthaving to perform recalibration involving an external pressuresource.

(Optional) The transmitter will provide the means of managing asystem for automatic high pressure purge of the airflow station orprobe array, with user selectable purge frequency and duration,while maintaining the last transmitter output during the purge cycle.

The mass flow transmitter shall be the VELTRON DPT-plus asmanufactured by Air Monitor Corporation, Santa Rosa, California.

Mounting Configurations with Optional Brackets


Angle Mount to Horizontal Pipe Vertical Mount to Horizontal Pipe Mount to Horizontal Channel

Mount to Flat SurfaceVertical Mount to Vertical Pipe

Note: Mounting bracket kit includes³⁄₈-16 U-bolt, nuts, and washers for2" Schedule 40 pipe, plus 4 bolts andwashers to attach the transmitter to themounting bracket.

ORDERINGINFORMATION





VELTRON DPT-plus

ORDER-Q020, Rev. 7 (3/01)














FLOW SENSING ELEMENT

q Air Monitor Station/Probeq Other. If checked, provide flow rate vs. ∆P formula.

TEMPERATURE SENSING ELEMENT TEMPERATURE TRANSMITTERqNone qSupplied by others. If checked, provide the temperature transmitter information.

q 4-20mA = ______ ºF to ______ ºFqTemperature Probe to be supplied by Air Monitor. q 2 wire 4-20mA (loop powered by VELTRON DPT-plus)

Probe includes temperature transmitter. or q 4-20mA self-poweredq Single Point RTD Probe (3 wire, 100 ohm platinum) q Linear to Temperature or q Linear to Voltage.q Single Point T/C Probe, Type ____ T/C AMC recommends Linear to Temperature. If not, the VELTRON DPT-plusq Multi Point (3) T/C Probe, Type ____ T/C can linearize the temperature signal for the following sensors:

q RTD (3 wire, 100 ohm, platinum) q Thermocouple Type "J"q Thermocouple Type "K" q Thermocouple Type "T"q Thermocouple Type "E"

DENSITY COMPENSATION. Skip this section if Differential Pressure Measurement Application is checked above.

qDensity Compensation is done in the VELTRON DPT-plus.qNot required. Use above specified density for transmitter span calculation.qDensity Compensation performed in DCS by others. If checked, transmitter display and output will be IN w.c. for the above process

conditions. Square root will be turned OFF.qSingle Point Correction in VELTRON DPT-plus: Average Operating Temperature ________ºF

Average Operating Static Pressure ________ IN w.c.

Page 1 of 2

Formula


ORDERINGINFORMATION





VELTRON DPT-plus

ORDER-Q021, Rev. 8 (7/04)

TRANSMITTER CONFIGURATION

DISPLAY. Backlit graphics LCD OUTPUTS.

Line #1 Main Process Variable (Flow or DP) q Non-isolated (standard)

Line #2 Select one below: q Isolated. (Loop power to be provided by others).

q Temperature

q Flow (not available if main process is DP) Output #1 Main Process (Flow or DP) Variable

q DP

q Bar graph of the main process variable (0-100%) Output #2 Select one below:

q Alarm Setpoint #1 q Temperature

q Alarm Setpoint #2 q Flow

q Transmitter Tag q DP

Line #3 Select one below:

q Temperature

q Flow (not availabe if main process is DP)

q DP

q Bar graph of the main process variable (0-100%)

q Alarm Setpoint #1

q Alarm Setpoint #2

q Transmitter Tag

ALARMS. Not available if AUTO-purge Management is selected. Must be the same range and units as the measured variable.

qNone (standard)

q Low/High .................... Low Setpoint __________ High Setpoint __________q High1/High2 ............... High1 Setpoint __________ High2 Setpoint __________q Low1/Low2 ................. Low1 Setpoint __________ Low2 Setpoint __________

AUTO-purge MANAGEMENT. Not available if Alarms are selected. Must be the same range and units as the measured variable.

qDisabled (standard)qEnabled (Internally Timed). The VELTRON DPT-plus initiates the AUTO-purge sequence at preset time intervals programmed in the

VELTRON DPT-plus (user selectable).q Enabled (Externally Timed). The VELTRON DPT-plus receives an external dry contact to initiate the AUTO-purge sequence.

Note: To allow us to select the correct coil voltage on the AUTO-purge solenoids, you MUST advise the power input to the VELTRON DPT-plus.

Power Input. Must check one of the following:q 24VACq 24VDC

Page 2 of 2


qNone (standard)qNIST Traceable Factory Calibration

Certificate

VALVE MANIFOLD

qNone (standard)q 3 Valve, S.S.

q5 Valve, S.S.


ID TAG

qNone (standard)

q2" x 4" S.S. wired on tag

VELTRON IIMicroprocessor Based

Pressure & Flow "Smart" Transmitter

NEW

0.1% ACCURACY

The VELTRON II transmitter is furnished with an automatic zeroingcircuit capable of electronically adjusting the transmitter zero atpredetermined time intervals while simultaneously holding thetransmitter output signal.

The automatic zeroing circuit eliminates all output signal drift dueto thermal, electronic or mechanical effects, as well as the need forinitial or periodic transmitter zeroing. For transmitters operated intemperature controlled spaces (with no thermal effect upon span),

this automatic zeroing function essentially produces a "self-calibrating" transmitter. The automatic zeroing circuit will re-zerothe transmitter to within 0.1% of its operating span; for a transmitterwith a 0.02 IN w.c. operating span, this represents a zeroing capabilitywithin 0.00002 IN w.c.

To permit manual calibration of the VELTRON II, an electronicswitch is provided to permit manual positioning of the zeroing valve.


VELTRON II

Indication

Displays. Standard 2 line x 20 character LCD provides one line ofdata display. Optional 4 line x 20 character backlit LCD providesup to 4 lines of data display.

LED's indicate CPU activated, AUTO-zero in progress, AUTO-zeroover-ranged, AUTO-purge in progress, and auxiliary alarm "on"status.

Inputs/Outputs

Analog Inputs. A single input is field configurable via jumper for0-5VDC, 0-10VDC, or 4-20mADC. For use with optional specialfunction.

Analog Outputs. Dual transmitter outputs are individuallyconfigurable via jumper for 0-5VDC, 0-10VDC, or 4-20mADC.Two additional outputs are optionally available.

Digital Inputs. Dry contact for AUTO-purge external start.

Digital Outputs. Form C dry contacts rated for 3 amps at 24VAC/VDC for optional HI/LO alarm. Dual Form A dry contacts rated for3 amps at 24VAC/VDC for AUTO-purge activation andacknowledgment.

Power

Power Supply.Standard 24VAC (20-28VAC) or 24VDC (20-40VDC).Optional 120VAC (100-132VAC), via external transformer.

Power Consumption.Standard: 18VA at 24VAC; 13VA at 24VDC; 36VA at 120VAC.With AUTO-purge Management: 54VA at 24VAC; 48VA at 24VDC;108VA at 120VAC

Circuit Protection. Power input is isolated, fused, and reversepolarity protected.

Transmitter


Accuracy. 0.1% of Natural Span, including non-linearity,hysteresis, deadband, and non-repeatability.



Transducer Response Time. 0.5 second to reach 98% of a stepchange.

Temperature Effect. Zero. None; corrected by AUTO-zero.Span. 0.015% of Full Span/ºF.

Mounting Position Effect. None; corrected by AUTO-zero.

Span and Zero Adjustment. Digital, via internally located push-buttons.


Low Pass Filtration. Response time to reach 98% of a step changeis adjustable from 2.0 to 250.0 seconds.


Temperature Limits. –20 to 180ºF Storage; +40 to 140ºF Operating.




Ultra-Low Differential Pressure & Flow "Smart" Transmitter

Accuracy. The VELTRON II is designed to maintain an accuracyof 0.1% of Natural Span. For a span of 0 to 0.05 IN w.c., this accuracyis equivalent to an output accuracy of ±0.00005 IN w.c. differentialpressure or 0.45 FPM velocity at span.

Continuous Display of Process. All VELTRON II's are equippedwith a 2x20 liquid crystal display (LCD) for use during theconfiguration and calibration process, and to display one transmitteroutput during normal operating mode. An optional 4x20 backlitLCD display provides up to four lines of data display, with eachline individually scalable in user selectable format and units ofmeasure.

Analog Communication. Each analog input and output signal canbe individually configured for 0-5VDC, 0-10VDC, or 4-20mADCby means of a single jumper.

Electronic Respanning. The VELTRON II operating span can beelectronically selected anywhere between the Natural Span and 40%of Natural Span, without having to perform recalibration involvingan external pressure source.

Primary Signal Noise Filter. To eliminate background noise andpulsations from the flow signal, the VELTRON II is equipped witha user selectable digital low pass filter.

Microprocessor Based Functionality. The VELTRON II's on-boardmicroprocessor performs the functions of operating parameterselection, transmitter configuration, input/output and display signalscaling, and transducer calibration. Imbedded software performsspan, flow, and 3-point "K" factor calculations. Input to the micro-processor is via pushbutton.

Features

AUTO-purge Management (optional). For "dirty air" applicationsrequiring the use of an Air Monitor AUTO-purge system, theVELTRON II provides the capabilities of establishing purgefrequency and duration while giving the user a choice of eitherinternally timed cycle frequency or externally triggered purgeinitiation. During the purge cycle all transmitter outputs aremaintained at their last value prior to the start of the purge cycle.

High Turndown Ratio Operation. The VELTRON II, with itshigh level of accuracy and automatic zeroing circuitry, can maintainlinear output signals on applications requiring velocity turndown of10 to 1 (equal to a velocity pressure turndown of 100 to 1).

Special Functions and Alarm Capability. The VELTRON II iscapable of performing one of five special application functions usinga second transmitter as an input: Summed flow, flow differential,low signal select, high signal select, or percent deviation. The specialfunction output can be both displayed and provided as an analogoutput signal. Alarms related to the measured process can beconfigured for one of three modes: Low/Low, Low/High, and High/High.

Multiple Operating Power Selections. Standard input powersupplied to the VELTRON II can be either 24VAC or 24VDC viaautomatic selection. An optional 120VAC external power transformer(UL listed) can be provided.

Enclosure. The VELTRON II is furnished in a NEMA 1 aluminumenclosure with external, unitary plug in terminal strips for ease ofinstallation and removal. An optional junction box is available forapplications requiring enclosed field wiring.

Removabletop cover

External, unitaryplug-in terminalstrips for fieldwiring connections

Transmitter status LED's

ON-OFF power switch

Integral liquid crystaldisplay. Optional fourline display shown.

AluminumNEMA 1 enclosure

Instrumentmounting bracket

High and low pressure,1/8” connections.Suitableto accept barb orcompression fittings.

Signal Connections.High and low pressure, 1/8" FPT.

Electrical Connections.External terminal strip with plug-in connectors. Optionalterminal strip enclosure with dual 3/4" (.875" actual) conduitconnections.


Enclosure.NEMA 1 aluminum enclosure.

Weight.4.1 lbs.

125-550 (8/04)

VELTRON II



The transmitter shall be capable of receiving flow signals (total andstatic pressure) from an airflow station or probe array and producedual outputs linear and scaled for air volume, velocity, differentialpressure, etc.

The transmitter shall contain an integral multi-line digital displayfor use during the configuration and calibration process, and todisplay one transmitter output during normal operating mode. Alltransmitter configuration, parameter setting, zero and spancalibration, plus display formatting and scaling will be performeddigitally in the on-board microprocessor via input pushbuttons.

The transmitter will be available in multiple natural spans coveringthe range of 0.05 IN w.c. to 10.0 IN w.c. with an accuracy of 0.1%of natural span. The transmitter shall be furnished with a transducerautomatic zeroing circuit and be capable of maintaining linear outputsignals on applications requiring 10 to 1 velocity (100 to 1 pressure)turndown.

The transmitter shall be capable of having its operating spanelectronically selected without having to perform recalibrationinvolving an external pressure source.

(Optional) The transmitter will provide the means of managing asystem for automatic high pressure purge of the airflow station orprobe array, with user selectable purge frequency and duration, whilemaintaining the last transmitter output during the purge cycle.

(Optional) Using a second transmitter as an input, the internalmicroprocessor can perform a summed flow, flow differential, lowsignal select, high signal select or percent deviation calculation,with the result being displayed and provided as an analog outputsignal.

The transmitter shall be the VELTRON II as manufactured by AirMonitor Corporation, Santa Rosa, California.


ORDERINGINFORMATION





VELTRON II

ORDER-Q023, Rev. 8 (10/02)














FLOW SENSING ELEMENTq Air Monitor Station/Probeq Other. If checked, provide flow rate vs. ∆P formula.


Display.q 2x20 LCD standard (only displays process variable).q 4x20 LCD (optional)

Display Line 1 ............................ Display Line 2 ......................... Display Line 3 ......................... Display Line 4 Process Variable (standard) (select one) (select one) (select one)

q Special Func Input ............q Special Func Input ............q Special Func Inputq Special Func Output .........q Special Func Output .........q Special Func Outputq Raw DP* ............................q Raw DP* ............................q Raw DP*q Transmitter Tag .................q Transmitter Tag .................q Transmitter Tagq None ..................................q None ..................................q None *not available if measured variable is DP.

Outputs. 4-20mA (std) 0-10VDC 0-5VDC

Output #1, Process Variable .........................q (std) ..................q .......................q Output #2, Process Variable .........................q ...........................q (std) ..............qq Output #3, (select one below) (optional) ......q ...........................q .......................qq Special Function q Processq Raw DP q None

q Output #4 (select one below) (optional) .......q ...........................q .......................qq Special Function q Processq Raw DP q None

Page 1 of 2

Formula


ORDERINGINFORMATION





VELTRON II

ORDER-Q024, Rev. 9 (07/04)

DENSITY COMPENSATION. Skip this section if Differential Pressure Measurement Application is checked on Page 1.

qNot required. Use above specified density for transmitter span calculation.

qDensity Compensation performed in DCS by others. If checked, transmitter will display and output IN w.c. for the above processconditions. Square root will be turned OFF.qSingle Point Correction in VELTRON II: Avg Operating Temp ________ºF Avg Operating Static Pressure ________ IN w.c.

SPECIAL FUNCTIONS

q None (standard)

q Summed Flow .......... This function allows an external input signal to be summed with the transmitter signal.Special Function Output = Transmitter Flow + External Flow

q ∆ CFM ...................... This function allows an external input signal to be subtracted from the transmitter signal.Special Function Output = Transmitter Flow – External Flow

q Averaged Flow ......... This function allows an external input signal to be averaged with the transmitter signal.Special Function Output = (Transmitter Flow + External Flow)

2q High Select ............... This function selects higher signal between transmitter signal and external signal.

q Low Select ................ This function selects lower signal between the transmitter signal and external signal.

q % Deviation Alarm.... This special function calculates % deviation from the external reference flow signal.

Special Function O/P = (Transmitter Flow – External Flow) x 100External Flow

Special Function Input. q 4-20mA q 0-10VDC q 0-5VDC

In order to appropriately scale the external input signal, please state the range: ___________ to ___________ Flow units: _________(Units must be the same as measured variable).

ALARMS. Must be the same range and units as the measured variable.

qNone (standard)

q Low/High .................... Low Setpoint __________ High Setpoint __________q High1/High2 ............... High1 Setpoint __________ High2 Setpoint __________q Low1/Low2 ................. Low1 Setpoint __________ Low2 Setpoint __________

– OR –

AUTO-purge MANAGEMENT

qDisabled (standard)qEnabled (Internally Timed). The VELTRON II initiates the AUTO-purge sequence at preset time intervals programmed in the VELTRON

II (user selectable).q Enabled (Externally Timed). The VELTRON II receives an external dry contact to initiate the AUTO-purge sequence.

Note: To allow us to select the correct coil voltage on the AUTO-purge solenoids, you MUST state the power input to the VELTRON II.

POWER INPUT. Must check one of the following:q 24VAC q 24VDC q 120VAC (via external transformer)

Page 2 of 2

CONDUIT CONNECTION BOXqNone (standard)q Installed


CONNECTION FITTINGSq1/8" FPT (standard)q1/4" Compression (brass)q1/4" Compression (stainless steel)

ID TAGqNone (standard)q2" x 4" S.S. wired

on tag

CALIBRATION CERTIFICATEqNone (standard)qNIST Traceable Factory

Calibration Certificate

NOTE: Either Alarms orAUTO-purge Management(only one) is available.

VEL-trol IIMicroprocessor Based

Pressure & Flow "Smart" Transmitter-Controller

NEW

0.1% A

CCURACY

The VEL-trol II transmitter-controller is furnished with an automaticzeroing circuit capable of electronically adjusting the transmitterzero at predetermined time intervals while simultaneously holdingthe transmitter output signal.

The automatic zeroing circuit eliminates all output signal drift dueto thermal, electronic or mechanical effects, as well as the need forinitial or periodic transmitter zeroing. For transmitters operatedin temperature controlled spaces (with no thermal effect upon span),

this automatic zeroing function essentially produces a “self-calibrating” transmitter. The automatic zeroing circuit will re-zero the transmitter to within 0.1% of its operating span; for atransmitter with a 0.02 IN w.c. operating span, this represents azeroing capability within 0.00002 IN w.c.

To permit manual calibration of the VEL-trol II, an electronic switchis provided to permit manual positioning of the zeroing valve.


VEL-trol II

Indication

Displays. Standard 2 line x 20 character LCD provides twolines of data display. Optional 4 line x 20 character LCDprovides up to 4 lines of data display.

LED's indicate CPU activated, AUTO-zero in progress, AUTO-zero over-ranged, AUTO-purge in progress, and auxiliary alarm"on" status.

Inputs/Outputs

Analog Inputs. Dual inputs are field configurable via jumperfor 0-5VDC, 0-10VDC, or 4-20mADC. For use with optionalspecial function and controller external setpoint.

Analog Outputs. The single transmitter and controller outputsare individually configurable via jumper for 0-5VDC,0-10VDC, or 4-20mADC. Two additional outputs are optionallyavailable.

Controller. Controller output type is P, I, , user selectableforward or reverse acting. Controller setpoint is user selectableas internal or via external analog input.

Digital Inputs. Dry contacts for soft start command and AUTO-purge external start command.

Digital Outputs. Form C dry contacts rated for 3 amps at24VAC/VDC for optional HI/LO alarm. Dual Form A drycontacts rated for 3 amps at 24VAC/VDC for AUTO-purgeactivation and acknowledgment.

PowerPower Supply.Standard 24VAC (20-28VAC) or 24VDC (20-40VDC).Optional 120VAC (100-132VAC), via external transformer.

Power Consumption.Standard: 18VA at 24VAC; 13VA at 24VDC; 36VA at 120VAC.With AUTO-purge Management: 54VA at 24VAC; 48VA at 24VDC;108VA at 120VAC

Circuit Protection. Power input is isolated, fused, and reversepolarity protected.

Transmitter


Accuracy. 0.1% of Natural Span, including non-linearity,hysteresis, deadband, and non-repeatability.



Transducer Response Time. 0.5 second to reach 98% of a stepchange.

Temperature Effect. Zero. None; corrected by AUTO-zero.Span. 0.015% of Full Span/ºF.

Mounting Position Effect. None; corrected by AUTO-zero.

Span and Zero Adjustment. Digital, via internally locatedpushbuttons.


Low Pass Filtration. Response time to reach 98% of a step changeis adjustable from 2.0 to 250.0 seconds.


Temperature Limits. –20 to 180ºF Storage.+40 to 120ºF Operating.



1D

NEWNEWNEWNEWNEW→→→→→


Ultra-Low Differential Pressure & Flow "Smart" Transmitter-Controller

Removable top cover.

External, unitary plug-interminal strips for field

wiring connections.

Transmitter status LED's.

Side located ON-OFFpower switch.

Integral liquid crystaldisplay. Optional fourline display shown.

Aluminum NEMA 1enclosure.

Instrumentmounting bracket.

High and low pressure,¹⁄₈" FPT input signalconnections. Suitableto accept barb orcompression fittings.

Primary Signal Noise Filter. To eliminate background noise andpulsations from the flow signal, the VEL-trol II is equipped with auser selectable digital low pass filter.

Special Functions and Alarm Capability. The VEL-trol II iscapable of performing one of five special application functions usinga second transmitter as an input: Summed flow, flow differential,low signal select, high signal select, or percent deviation. Thespecial function output can be both displayed and provided as ananalog output signal. Alarms related to the measured process canbe configured for one of three modes: Low/Low, High/Low, andHigh/High.

Continuous Display of Process. All VEL-trol II's are equippedwith a 2x20 liquid crystal display (LCD) for use during theconfiguration and calibration process, and one line of data displayplus the control setpoint. An optional 4x20 backlit LCD providesup to four lines of data display, with each line individually scalablein user selectable format and units of measure.


AUTO-purge Management (optional). For “dirty air” applica-tions requiring the use of an Air Monitor AUTO-purge system, theVEL-trol II provides the capabilities of establishing purge frequencyand duration while giving the user a choice of either internallytimed cycle frequency or externally triggered purge initiation.During the purge cycle all transmitter outputs are maintained attheir last value prior to the start of the purge cycle.

Enclosure. The VEL-trol II is furnished in a NEMA 1 aluminumenclosure with external, unitary plug in terminal strips for ease ofinstallation and removal. An optional junction box is available forapplications requiring enclosed field wiring.

Features

Accuracy. The VEL-trol II is designed to maintain an accuracy of0.1% of natural full span. For a span of 0 to 0.05 IN w.c., thisaccuracy is equivalent to an output accuracy of ±0.00005 IN w.c.differential pressure or ±0.90 FPM velocity.

Accurate, Dynamically Stable Controller Action. The VEL-trolII incorporates the three control modes of proportional, integralreset, and inverse derivative to permit the controller action to betuned to the extreme dynamics of the airflow or pressurizationcontrol process. The selection of the P, I, tuning parameters isaccomplished using pushbuttons. The controller operating setpointcan alternate between either the internal fixed setpoint or theexternal variable setpoint, relative to the transmitter signal orspecial function output.

Microprocessor Based Functionality. The VEL-trol II's on-boardmicroprocessor performs the functions of operating parameterselection, transmitter configuration, input/output and display signalscaling, controller tuning, and transducer calibration. Imbeddedsoftware performs span, flow, and 3-point "K" factor calculations.Input to the microprocessor is via pushbutton.

Electronic Respanning. The VEL-trol II operating span can beelectronically selected anywhere between the Natural Span and40% of Natural Span, without having to perform recalibrationinvolving an external pressure source.

Multiple Operating Power Selections. Standard input powersupplied to the VEL-trol II can be either 24VAC or 24VDC viaautomatic selection. An optional 120VAC external powertransformer (UL listed) can be provided.

High Turndown Ratio Operation. The VEL-trol II, with its highlevel of accuracy and automatic zeroing circuitry, can maintain linearoutput signals on applications requiring velocity turndown of 10 to1 (equal to a velocity pressure turndown of 100 to 1).

1D




Signal Connections. High and low pressure, ¹⁄₈" FPT.

Electrical Connections. External terminal strip with plug-inconnectors. Optional terminal strip enclosure with dual ¹⁄₂"(.875" actual) conduit connections.


Enclosure. NEMA 1 aluminum enclosure.

Weight. 4.1 lbs. – 24VDC5.1 lbs. – 24VAC and 120VAC

125-630 (1/99)

VEL-trol II

1D



The transmitter-controller shall be capable of receiving flow signals(total and static pressure) from an airflow station or probe arrayand produce an output linear and scaled for air volume, velocity,differential pressure, etc. The internal P, I, three-mode controllershall be capable of controlling at a user selectable internal orexternal setpoint, and output a 0-5VDC, 0-10VDC, or 4-20mADCcontrol signal.

The transmitter-controller shall contain an integral multi-line digitaldisplay for use during the configuration and calibration process,and to display one transmitter output plus controller setpoint duringnormal operating mode. All transmitter configuration, parametersetting, zero and span calibration, plus display formatting andscaling will be performed digitally in the on-board microprocessorvia input pushbuttons.

The transmitter-controller will be available in multiple naturalspans covering the range of 0.05 IN w.c. to 10.0 IN w.c. with anaccuracy of 0.10% of natural span. The transmitter-controller shallbe furnished with a transducer automatic zeroing circuit, and becapable of maintaining linear output signals on applicationsrequiring 10 to 1 velocity or pressure turndown.

The transmitter-controller shall be capable of having its operatingspan electronically selected without having to perform recalibrationinvolving an external pressure source.

(Optional) The transmitter-controller will provide the means ofmanaging a system for automatic high pressure purge of the airflowstation or probe array, with user selectable purge frequency andduration, while maintaining the last transmitter output during thepurge cycle.


The transmitter-controller shall be the VEL-trol II as manufacturedby Air Monitor Corporation, Santa Rosa, California.


ORDERINGINFORMATION





VEL-trol II

ORDER-Q033, Rev. 8 (10/02)

APPLICATION - INDUSTRIAL (Either Differential Pressure Measurement or Flow Measurement – Check only one)q Differential Pressure Measurement such as duct, room or space pressure.

Minimum __________ Units:Normal __________ Transmitter Span: _________ to _________ q IN w.c. q PascalsMaximum __________ q mm of w.c. q Other: ________________










Display.q 2x20 LCD. Line 1: Measured Variable Line 2: Controller Setpoint (standard)q 4x20 LCD (optional)

Display Line 1 ............................ Display Line 2 ......................... Display Line 3 ......................... Display Line 4 Measured Variable (standard)(select one) (select one) (select one)

q Alarm Setpoint #1 .............q Alarm Setpoint #1 .............q Alarm Setpoint #1q Alarm Setpoint #2 .............q Alarm Setpoint #2 .............q Alarm Setpoint #2q Controller Setpoint ............q Controller Setpoint ............q Controller Setpointq Controller Output ...............q Controller Output ...............q Controller Outputq Special Func Input ............q Special Func Input ............q Special Func Inputq Special Func Output .........q Special Func Output .........q Special Func Outputq Raw DP* ............................q Raw DP* ............................q Raw DP*q Transmitter Tag .................q Transmitter Tag .................q Transmitter Tagq None ..................................q None ..................................q None *not available if measured variable is DP.


Output #1, Measured Variable .......................................................q (standard) ........q ..........................q Output #2, Controller ......................................................................q (standard) ........q ..........................qq Output #3, (select one below) (optional) .......................................q ..........................q ..........................qq Special Function q Measured Variable q Controllerq Raw DP q None

q Output #4 (select one below) (optional) ........................................q ..........................q ..........................qq Special Function q Measured Variable q Controllerq Raw DP q None

Page 1 of 2

Formula


ORDERINGINFORMATION





VEL-trol II

ORDER-Q034, Rev. 9 (07/04)

DENSITY COMPENSATION. Skip this section if Differential Pressure Measurement Application is checked above.qNot required. Use above specified density for transmitter span calculation.qDensity Compensation performed in DCS by others. If checked, transmitter will display and output IN w.c. for the above process condi-

tions. Square root will be turned OFF.qSingle Point Correction in VEL-trol II: Avg Operating Temp ________ºF Avg Operating Static Pressure ________ IN w.c.

SPECIAL FUNCTIONSq None (standard)q Summed Flow ........... This function allows an external input signal to be summed with the transmitter signal.

Special Function Output = Transmitter Flow + External Flowq ∆ CFM ....................... This function allows an external input signal to be subtracted from the transmitter signal.

Special Function Output = Transmitter Flow – External Flowq Averaged Flow .......... This function allows an external input signal to be averaged with the transmitter signal.

Special Function Output = (Transmitter Flow + External Flow) ÷ 2q High Select ............... This function selects higher signal between transmitter signal and external signal.q Low Select ................ This function selects lower signal between the transmitter signal and external signal.q % Deviation Alarm .... This special function calculates % deviation from the external reference flow signal.

Special Function O/P = (Transmitter Flow – External Flow) ÷ External Flow x 100


In order to appropriately scale the external input signal, state the range: _________ to _________ *Flow units: _________ (*Units must be the same as measured variable)


qNone (standard)

q Low/High .................... Low Setpoint __________ High Setpoint __________

q High1/High2 ............... High1 Setpoint __________ High2 Setpoint __________

q Low1/Low2 ................. Low1 Setpoint __________ Low2 Setpoint __________

– OR –

AUTO-purge MANAGEMENT

qDisabled (standard).qEnabled (Internally Timed). The VEL-trol II initiates the AUTO-purge sequence at preset time intervals programmed in the VEL-trol II

(user selectable).q Enabled (Externally Timed). The VEL-trol II receives an external dry contact to initiate the AUTO-purge sequence.

CONTROLLER DATAAction q Reverse. Controller output increases when process decreases below the setpoint.

q Direct. Controller output decreases when process decreases below the setpoint.

Softstart (Requires an external dry contact closure to enable the controller output. When contact is open, controller output is at minimum).q None (standard). q Required.

SETPOINTSq Internal Setpoint (standard). Setpoint Value: __________ (Must be same range and units as measured variable)q External Setpoint. q None

q 0-5VDCq 0-10VDC Setpoint Value: __________ (Must be same range and units as measured variable)q 4-20mA

q Internal & External Setpoints. This requires an external dry contact closure to switch from an internal setpoint to an external setpoint.

Page 2 of 2

CONDUIT CONNECTION BOXqNone (standard)q Installed


CONNECTION FITTINGSq1/8" FPT (standard)q1/4" Compression (brass)q1/4" Compression (stainless steel)

ID TAGqNone (standard)q2" x 4" S.S. wired

on tag

CALIBRATION CERTIFICATEqNone (standard)qNIST Traceable Factory


NOTE: Either Alarms orAUTO-purge Management(only one) is available.

MASS-tron IIMicroprocessor Based

Mass Flow "Smart" Transmitter

The MASS-tron II transmitter is furnished with an automatic zeroingcircuit capable of electronically adjusting the transmitter zero atpredetermined time intervals while simultaneously holding thetransmitter output signal.

The automatic zeroing circuit eliminates all output signal drift dueto thermal, electronic or mechanical effects, as well as the need forinitial or periodic transmitter zeroing. For transmitters operated intemperature controlled spaces (with no thermal effect upon span),

this automatic zeroing function essentially produces a “self-calibrating” transmitter. The automatic zeroing circuit will re-zerothe transmitter to within 0.1% of its operating span; for a transmitterwith a 0.10 IN w.c. span, this represents a zeroing capability within0.0001 IN w.c.

To permit manual zeroing and/or re-spanning of the MASS-tron II,an electronic switch is provided to permit manual positioning ofthe zeroing valve.


MASS-tron II

Transmitter

Ranges. Natural Full Span Min Calibrated Span0 to 10.00 IN w.c. 0 to 4.00 IN w.c.0 to 5.00 IN w.c. 0 to 2.00 IN w.c.0 to 2.00 IN w.c. 0 to 0.80 IN w.c.0 to 1.00 IN w.c. 0 to 0.40 IN w.c.0 to 0.50 IN w.c. 0 to 0.20 IN w.c.0 to 0.25 IN w.c. 0 to 0.10 IN w.c.0 to 0.10 IN w.c. 0 to 0.04 IN w.c.0 to 0.05 IN w.c. 0 to 0.02 IN w.c.

Accuracy.±0.25% of Natural Span, including non-linearity,hysteresis, and non-repeatability.


Transducer Response Time.0.5 second to reach 98% of a step change.

Temperature Effect.Zero. None; corrected by AUTO-zero.Span. 0.015% of Full Span/ºF.

Mounting Position Effect.None; corrected by AUTO-zero.

Span and Zero Adjustment.Digital, via internally located push-buttons.


Low Pass Filtration.Response time to reach 98% of a step change isadjustable from 1.75 to 28.0 seconds.


Temperature Limits.–20 to 180ºF Storage.+40 to 120ºF Operating.


IndicationDisplays.

Standard 4 line x 20 character backlit LCD provides four linesof data display.

LED's indicate CPU activated, AUTO-zero in progress,AUTO-zero over-ranged, AUTO-purge in progress, andauxiliary alarm "on" status.

Inputs/OutputsAnalog Inputs.

Dual inputs are field configurable via jumper for 0-5VDC,0-10VDC, or 4-20mADC. One is reserved for temperatureinput; the other for use with optional special function.

Analog Outputs.Four standard outputs are individually configurable via jumperfor 0-5VDC, 0-10VDC, or 4-20mADC.

Digital Inputs.Dry contact for AUTO-purge external start command.

Digital Outputs.Form C dry contacts rated for 3 amps at 24VAC/VDCfor optional HI/LO alarm. Dual Form A dry contacts forAUTO-purge activation and acknowledgment.

Temperature Compensation Selection.Push-button selection of linearized or non-linear input. Choiceof thermocouple or 100 ohm platinum RTD temperature sensortype.

Type E -50 to 1750ºF -50 to 950ºCType T -50 to 750ºF -50 to 400ºCType J -50 to 2000ºF -50 to 1090ºCType K -50 to 2000ºF -50 to 1090ºCRTD -50 to 1500ºF -50 to 815ºC

Pressure Compensation.Absolute pressure (atmospheric or duct static), up to 60 INHg.

PowerPower Supply.

Standard 24VAC (20-28VAC) or 24VDC (20-40VDC).Optional 120VAC (100-132VAC).

Power Consumption.13.5VA at 24VAC, 10.0VA at 24VDC, 18.7VA at 120VAC.

Circuit Protection.Power input is fused and reverse polarity protected.



Ultra-Low Mass Flow "Smart" Transmitter

Removabletop cover.


wiring connections.

Transmitter status LED's.

Side located ON-OFFpower switch.

Integral liquidcrystal display.



High and low pressure,1/8" FPT input signalconnections. Suitableto accept barb orcompression fittings.

Accuracy. The MASS-tron II transmitter is designed to maintainan accuracy of ±0.25% of natural full span. For a span of 0 to 0.05IN w.c., this accuracy is equivalent to an output accuracy of±0.000125 IN w.c. differential pressure or ±1.12 FPM velocity.

Continuous Display of Process. All MASS-tron II transmittersare equipped with a 4x20 backlit liquid crystal display (LCD) foruse during the configuration and calibration process, and to displayup to four lines of output data (SCFM, ºF, Absolute Pressure, lbs/hr, etc.) during normal operation, with each line individually scalablein user selectable format and units of measure.

Special Functions Capability. Built into the MASS-tron IImicroprocessor is the capability to perform special applicationfunctions involving two transmitters. Using a second transmitteras an input to the MASS-tron II, one of the following functions canbe performed: summed flow, flow differential, low signal select,high signal select, or percent deviation. The special function outputcan be both displayed and provided as an analog output signal.

High Turndown Ratio Operation. The MASS-tron II transmitter,with its high level of accuracy and automatic zeroing circuitry, canmaintain linear output signals on applications requiring velocityturndown of 10 to 1.


Primary Signal Noise Filter. To eliminate background noise andpulsations from the flow signal, the MASS-tron II is equipped witha user selectable digital low pass filter.

Microprocessor Based Functionality. The MASS-tron II's on-board microprocessor performs the functions of operating parameterselection, transmitter configuration, input/output and display signalscaling, density correction, and transducer calibration. Input to themicroprocessor is via push-button, with separate user and technicianaccess.

Air Density Correction. The MASS-tron II transmitter is capableof performing both air temperature and air pressure correction.Temperature input is an analog signal from a remote temperaturetransmitter; non-linear temperature inputs can be linearized by themicroprocessor. Process pressure is measured by means of aninternal absolute pressure transmitter connected to the transmitterstatic pressure signal input.

AUTO-purge Management (optional). For “dirty air” applica-tions requiring the use of an Air Monitor AUTO-purge system, theMASS-tron II provides the capabilities of establishing purgefrequency and duration while giving the user a choice of eitherinternally timed cycle frequency or externally triggered purgeinitiation. During the purge cycle all transmitter outputs aremaintained at their last value prior to the start of the purge cycle.

Multiple Operating Power Selections. Standard input powersupplied to the MASS-tron II can be either 24VAC or 24VDC viaautomatic selection. An optional 120VAC external powertransformer (UL listed) can be provided.

Enclosure. The MASS-tron II transmitter is furnished in a NEMA1 aluminum enclosure with external, unitary plug in terminal stripsfor ease of installation and removal. An optional junction box isavailable for applications requiring enclosed field wiring.

Features

Signal Connections.High and low pressure, 1/8" FPT.

Electrical Connections.External terminal strip with plug-in connectors. Optionalterminal strip enclosure with dual 1/2" (.875" actual) conduitconnections.


Enclosure.NEMA 1 aluminum enclosure.

Weight.4.1 lbs. - 24VDC5.1 lbs. - 24VAC and 120VAC

125-005 (7/98)

MASS-tron II


The mass flow transmitter shall be capable of receiving flow signals(total and static pressure) from an airflow station or probe arrayequipped with a temperature sensing means, internally performdensity correction for the process temperature and absolute pressure,and produce individual outputs linear and scaled for standard airvolume or mass flow, temperature and absolute pressure.

The mass flow transmitter shall contain an integral digital displayfor use during the configuration and calibration process, and capableof simultaneous indication of the process flow, temperature andabsolute pressure during normal operating mode. All transmitterconfiguration, parameter setting, zero and span calibration, plusdisplay formatting and scaling will be performed digitally in theon-board microprocessor via input push-buttons.

The mass flow transmitter will be available in multiple natural spanscovering the range of 0.05 IN w.c. to 10.0 IN w.c. with an accuracyof ±0.25% of natural span. The transmitter shall be furnished witha transducer automatic zeroing circuit and be capable of maintaininglinear output signals on applications requiring 10 to 1 velocity orpressure turndown.

(Optional) The transmitter will provide the means of managing asystem for automatic high pressure purge of the airflow station orprobe array, with user selectable purge frequency and duration, whilemaintaining the last transmitter output during the purge cycle.


The mass flow transmitter shall be the MASS-tron II asmanufactured by Air Monitor Corporation, Santa Rosa, California.



ORDERINGINFORMATION





MASS-tron II

ORDER-Q018, Rev. 8 (10/02)

APPLICATION - INDUSTRIAL (Check only one)q Volumetric Flow Measurement. Flow rate measured for actual process conditions.q Mass Flow Measurement.q Volumetric Flow Measurement. Flow rate converted to standard conditions (68ºF, 29.921" Hg).

PROCESS CONDITIONS. Note: Unless otherwise noted below, AMC will add 10% to the max. flow rate given below for transmitter full span.








TEMPERATURE SENSING ELEMENT TEMPERATURE TRANSMITTERqNone (supplied by others) qSupplied by others. If checked, provide the temperature transmitter information.

q 4-20mA = ______ ºF to ______ ºFqTemperature Probe to be supplied by Air Monitor. q 2 wire 4-20mA (loop powered by MASS-tron II) or q 4-20mA self-powered

Probe includes temperature transmitter. q Linear to Temperature or q Linear to Voltageq Single Point RTD Probe (3 wire, 100 ohm platinum)q Single Point T/C Probe, Type ____ T/C AMC recommends Linear to Temperature. If not, the MASS-tron IIq Multi Point (3) T/C Probe, Type ____ T/C can linearize the temperature signal for the following sensors:

q RTD (3 wire, 100 ohm, platinum) q Thermocouple Type "J"q Thermocouple Type "K" q Thermocouple Type "T"q Thermocouple Type "E"

DENSITY COMPENSATIONThe MASS-tron II corrects for density changes due to changes in temperature and absolute pressure.The Factory default standard conditions are 68ºF and 29.921" Hg.For standard conditions other than stated above, provide the following: Standard Temp: _____ºF Standard Pressure: _____" Hg


Display.

4x20 LCD standard Display Line 1 ... Flow (standard) Display Line 2 ... Temp (standard) Display Line 3 ... Abs. Pressure (standard) Display Line 4 ... (select one below)

q Special Function Inputq Special Function Outputq Raw DPq Transmitter Tagq Noneq Alarm Setpoint #1q Alarm Setpoint #2


Output #1, Flow (standard) ................q ...................q ..................q Output #2, Temp (standard) ...............q ...................q ..................q Output #3, Abs. Pressure (standard) .q ...................q ..................q

Output #4 (select one below) .............q ...................q ..................qq Special Function q Raw DP

q Flow q Temp

q Abs. Pressure q None

Page 1 of 2

Formula


ORDERINGINFORMATION





MASS-tron II

ORDER-Q019, Rev. 9 (07/04)

SPECIAL FUNCTIONS

q None (standard)

q Summed Flow .......... This function allows an external input signal to be summed with the transmitter signal.Special Function Output = Transmitter Flow + External Flow

q ∆ CFM ...................... This function allows an external input signal to be subtracted from the transmitter signal.Special Function Output = Transmitter Flow – External Flow

q Averaged Flow ......... This function allows an external input signal to be averaged with the transmitter signal.Special Function Output = (Transmitter Flow + External Flow)

2q High Select ............... This function selects higher signal between transmitter signal and external signal.

q Low Select ................ This function selects lower signal between the transmitter signal and external signal.

q % Deviation Alarm.... This special function calculates % deviation from the external reference flow signal.

Special Function O/P = (Transmitter Flow – External Flow) x 100External Flow


In order to appropriately scale the external input signal, please state the range: ___________ to ___________ Flow units: _________(Units must be the same as measured variable).

NOTE: Either Alarms or AUTO-purge Management (only one) is available.


qNone (standard)

q Low/High .................... Low Setpoint __________ High Setpoint __________

q High1/High2 ............... High1 Setpoint __________ High2 Setpoint __________

q Low1/Low2 ................. Low1 Setpoint __________ Low2 Setpoint __________

– OR –

AUTO-purge MANAGEMENT. (Cannot be selected if Alarms, above, is selected)

qDisabled (standard)

qEnabled (Internally Timed). The MASS-tron II initiates the AUTO-purge sequence at preset time intervals programmed in theMASS-tron II (user selectable).q Enabled (Externally Timed). The MASS-tron II receives an external dry contact to initiate the AUTO-purge sequence.

Note: To allow us to select the correct coil voltage on the AUTO-purge solenoids, you MUST state the power input to the MASS-tron II.

Power Input. Must check one of the following:q 24VACq 24VDCq 120VAC (via external transformer)

Page 2 of 2


qNone (standard)qNIST Traceable Factory


CONDUIT CONNECTION BOX

qNone (standard)q Installed


CONNECTION FITTINGS

q1/8" FPT (standard)q1/4" Compression (brass)q1/4" Compression (stainless steel)

ID TAG

qNone (standard)q2" x 4" S.S. wired

on tag

AUTO-purge III

Air Monitor's AUTO-purge III is designed for applications wherethe presence of airborne particulate might impair the measurementaccuracy of Air Monitor's Combustion Air Station or VOLU-probearray. When activated by an Air Monitor "smart" flow transmitter(such as the VELTRON II, VEL-trol II, MASS-tron II, or VELTRONDPT-plus) or distributed control system, the AUTO-purge III

activates a combination of fail-safe valves to introduce high pressure/high volume air to the flow measuring device's sensing ports for ashort duration, while simultaneously isolating the transmitter fromover pressurization. This periodic purging assists in maintainingthe sensing ports of the total and static pressure manifolds in a clear,unobstructed condition.

Product Description

AUTO-purge III

Identification Code

V-1,3 Pneumatically Piloted, 5-Way Valve, Static (low) PressureV-2,4 Pneumatically Piloted, 5-Way Valve, Total (high) PressureSV-1 Solenoid Operated, 5-Way ValveSV-2 Solenoid Operated, 3-Way Valve

HV-1 Supply Air Shut Off ValvePI-1,2 Gauge, Supply Air Pressure, 0-160 psigPRV-1 Pressure Regulator

Sequence of Operations

When valves V1/V3 and V2/V4 operate, velocity pressure signallines (C and D) to the flow transmitter are isolated, and high pressurepurge air (AS1) is routed via the process signal lines (A and B) tothe station/probe array, cleaning the total and static pressure sensingports.

At the end of the purge cycle the transmitter withdraws its purgesignal, de-energizing SV-1 and causing valves V1/V2 and V3/V4to reset after a short time delay to their normal position, therebyreconnecting the process signal lines to the transmitter. After a shorttimed interval the transmitter signal hold is terminated and on-linesignal processing resumes.

Automatic line purging disconnects the transmitter from the processsensing lines at regular field selectable intervals and purges theairflow station or probe array with up to 125 psig air for shortperiods. This periodic purging assists in maintaining the sensingorifices of the total and static pressure manifolds in a clean,unobstructed condition.

A selectable timing sequence provided by the smart transmitteractivates solenoid pilot valve SV-1 which shuttles the transmitterisolation valves (V3 and V4) and purge valves (V1 and V2). Asimultaneous output signal hold corresponding to the last measuredinput is initiated by the transmitter and maintained until the purgecycle is complete.

Schematic

AUTO-purge III

Standard Construction

Brass and Copper Construction• All wetted tubing, fittings, and valves constructed of copper

and/or brass.• Enclosure is NEMA 4 painted steel.• External connection fittings are stainless steel FPT.

Stainless Steel Construction• All wetted tubing, fittings, and valves constructed of 316

stainless steel.• Enclosure is NEMA 4 painted steel.• External connection fittings are stainless steel FPT.

Optional Construction

NEMA 4X Stainless Steel Enclosure Enclosure Heater. Requires 120VAC power supply. Vortex Cooler. Requires 80-100 psi air supply.* Continuous Enclosure Purge*

*These options require a 24x24 enclosure.

SV-1 & SV-2 24VAC 24VDC 120VAC


Installation Guide

125-061 (9/97, Rev. 1)

AUTO-purge III

Air Requirement

• 80 to 125 psig at 100 CFM, oil and dirt free.

• 1 to 24 purge cycles per day, with a field selectable durationbetween 30 and 120 seconds during which compressed air isreleased.

Line Size

• If distance from AUTO-purge Panel to Flow Measuring Stationor Probes is less than 25', tube size to be ¹/₂" O.D. Wall thicknessno greater than 0.065".

• If distance from AUTO-purge Panel to Flow Measuring Stationor Probes is 25' to 50', tube size to be ³/₄" O.D. Wall thickness nogreater than 0.065".

• If distance from AUTO-purge Panel to Flow Measuring Stationor Probes is greater than 50', tube size to be 1.0" O.D. Wallthickness no greater than 0.065".

Purge Frequency

• Dependent upon the particulate concentration in each application.

• Adjustable in hourly increments; once per day the minimumfrequency, and once per hour the maximum frequency.

Purge Cycle Duration

• Dependent on sensing line size, length, and routing.

• Minimum: 60 seconds.Maximum: 120 seconds.

Ambient Temperature

• 32ºF to 120ºF.

• For ranges above or below this ambient temperature, use of panelheater and/or cooler is required.

Accumulator Tank (strongly recommended)

• Requires coalescing filter, pressure regulator, and check valve atthe tank inlet.

120 gallons - All CA stations.

120 gallons - Multiple VOLU-probes having a combined lengthgreater than 10'.

80 gallons - One or more VOLU-probes having a combinedlength less than 10'.

Line from Accumulator Tank to AUTO-purge Panel

• 25' maximum length, ¹/₂" pipe (minimum).

• Recommend locating accumulator tank as close as possible toAUTO-purge Panel.

Electrical Power Requirement

• 36VA, provided via the Air Monitor smart transmitter ordistributed control system's maintained activation signal.

• 120VAC, 10 amp when an optional enclosure heater is installed.

prevent transmitter overpressurization during purge system reset,loss of power, or in the event of unexpected loss of the purge controlsignal. The sequencing of the purge cycle shall not require the useof an onboard microprocessor or PLC. Between purge cycles, thesystem shall isolate the purge valves from the compressed air source.

The purge system shall be the AUTO-purge III as manufactured byAir Monitor Corporation, Santa Rosa, California.


The purge system shall be capable of periodically routing 100 CFMat 80-125 psi to the flow measuring element while simultaneouslyisolating the flow transmitter; low pressure continuous type purgesare not acceptable. A single, powered [24VAC, 24VDC or 120VAC]activation signal from a [VELTRON II, VEL-trol II, MASS-tron II,or VELTRON DPT-plus] smart transmitter or distributed controlsystem will activate the purge cycle and control the purge cycleduration. The purge system will use air to open/air to close purgevalves in conjunction with pneumatic fail safe control logic to


CAMSCombustion Airflow Management System

TM

The Air Monitor CAMSTM Combustion Airflow ManagementSystem is designed to fulfill the need for a reliable and accuratemeans of flow measurement in combustion airflow applications.Combined into a single engineered package are the CAMMTM

Combustion Airflow Management Module containing the

microprocessor based instrumentation to measure the airflow andmanage the purge cycle, and the AUTO-purge III to protect againstany degradation in performance of the duct mounted measurementdevice(s) due to the presence of airborne particulate.

Product Description

CAMS – Combustion Airflow Management SystemTM

CAMMTM Performance Specification

Accuracy.±0.1% of Natural Span, including non-linearity, hysteresis,and non-repeatability.


Temperature Effect.Zero: None; corrected by AUTO-zero.Span: 0.015% of Full Span/ºF.

Power Consumption.54VA at 24VAC; 48VA at 24VDC; 108VA at 120VAC.

CAMMTM Functional Specification

Digital Output.Separate Form "A" dry contacts (maintained) forAUTO-purge activation and acknowledgment.

Digital Inputs.Separate dry contacts (momentary) for AUTO-purgeexternal start and purge interrupt commands.

Analog Outputs.Four standard outputs for flow, temperature, absolutepressure, and special function individually configurablevia jumper for 0-5VDC, 0-10VDC, or 4-20mADC.

Analog Inputs.Dual inputs are field configurable via jumper for 0-5VDC,0-10VDC, or 4-20mADC. One is reserved for temperatureinput; the other for use with special function.

AUTO-purge Management.AUTO-purge cycle is initiated via an external dry contact(momentary), or via an internal timer with field selectablefrequencies of 1 to 24 hours, in 1 hour increments.

Low Pass Filtration.Response time to reach 98% of a step change is adjustablefrom 2.0 to 250.0 seconds.

Power Supply.Standard 24VAC (20-28VAC) or 24VDC (20-40VDC),with automatic selection. Optional 120VAC (100-132VAC) via external UL listed transformer.


Automatic Zeroing.Accuracy. Within 0.1% of calibrated span.Frequency. Every 1 to 24 hours selectable on 1 hour

intervals.

Circuit Protection.Power input is fused and reverse polarity protected.

Span and Zero Adjustment.Digital, via internally located push-buttons.

Displays.Standard 4 line x 20 character LCD provides four lines ofdata display.

Temperature Compensation Selection.Push-button selection of linearized or nonlinear input.Choice of thermocouple (Type E, K, J, and T) or 100 ohmplatinum RTD temperature sensor type.

Pressure Compensation.Absolute pressure (atmosphere or duct static), up to60"Hg.


Temperature Limits.–20ºF to 180ºF Storage.+40ºF to 120ºF Operating.

Special Functions Certification Rapid Stop Summed Flow Standard Yes Differential Flow NIST Traceable No

CAMMTM Construction Options

Air Monitor's AUTO-purge III is designed for applications wherethe presence of airborne particulate might impair the measurementaccuracy of Air Monitor's Combustion Air Station or VOLU-probearray. When activated by a CAMMTM or distributed control system,a combination of fail-safe valves are operated to introduce high

pressure/high volume air to the flow measuring device's sensingports for a short duration, while simultaneously isolating theCAMMTM from overpressurization. This periodic purging assistsin maintaining the sensing ports of the total and static pressuremanifolds in a clear, unobstructed condition.

Product Description

AUTO-purge III

NOTE: CAMSTM with Rapid StopTM option requires an enclosure that is 24" wide by 30" high.

NEMA 4X Stainless Steel Enclosure Vortex Cooler. Requires 80-100 psi air supply. Rapid StopTM

Power 24VAC 24VDC 120VAC

Optional Construction


Brass and Copper Construction• All wetted tubing, fittings, and valves constructed of copper and/

or brass.• Enclosure is NEMA 4 painted steel.• External connection fittings are stainless steel FPT.

Standard Construction

AUTO-purge III

Sequence of Operation

Automatic line purging disconnects the CAMMTM from the processsignal lines at regular field selectable intervals and purges theairflow station or probe array with up to 125 psig air for shortperiods. This periodic purging assists in maintaining the sensingorifices of the total and static pressure manifolds in a clean,unobstructed condition.

A selectable timing sequence provided by the CAMMTM activatessolenoid pilot valve SV-1 which shuttles the CAMMTM isolationvalves (V-3 and V-4) and purge valves (V-1 and V-2). A simul-taneous output signal hold corresponding to the last measured inputis initiated by the CAMMTM and maintained until the purge cycleis complete.

When valves V-1/V-3 and V-2/V-4 operate, velocity pressure signallines to the CAMMTM are isolated, and high pressure purge air(AS1) is routed via the process signal lines (A and B) to the station/probe array, cleaning the total and static pressure sensing ports.

At the end of the purge cycle the CAMMTM withdraws its purgesignal, de-energizing SV-1 and causing valves V-1/V-2 and V-3/V-4 to reset after a short time delay to their normal position, therebyreconnecting the process signal lines to the CAMMTM. After ashort timed interval the CAMMTM signal hold is terminated andon-line signal processing resumes.

Purge Cycle Timing

CAMMTM – Standard CAMMTM with Rapid StopTM

Schematic

IDENTIFICATION CODE

V-1,3 Pneumatically Piloted, 5-WayValve, Static (low) Pressure

V-2,4 Pneumatically Piloted, 5-WayValve, Total (high) Pressure

SV-1 Solenoid Operated, 5-Way ValveSV-2 Solenoid Operated, 3-Way ValveHV-1 Supply Air Shut Off ValvePI-1,2 Gauge, Supply Air Pressure,

0-160 psigPRV-1 Pressure Regulator

SV-3A,3B Solenoid Operated, 3-Way Valve(Optional for Rapid Stop)

CAMM – Combustion Airflow Management ModuleTM


Removabletop cover.


wiring connections.

ON-OFF power switch.

Integral liquidcrystal display.



Features


Primary Signal Noise Filter. To eliminate background noise andpulsations from the flow signal, the CAMMTM is equipped with auser selectable digital low pass filter.

Air Density Correction. The CAMMTM is capable of performingboth air temperature and air pressure correction. Temperature inputis an analog signal from a remote temperature transmitter; non-linear temperature inputs can be linearized by the microprocessor.Process pressure is measured by means of an internal absolutepressure transducer connected to the transmitter static pressuresignal input.

AUTO-purge Management. The CAMMTM provides the capabil-ities of establishing purge frequency and duration while giving theuser a choice of either internally timed cycle frequency or externallytriggered purge initiation. During the purge cycle all transmitteroutputs are maintained at their last value prior to the start of thepurge cycle. Upon receipt of a dry contact input, the CAMMTM

will interrupt a purge cycle in progress and return to normaloperation.

Optional Rapid StopTM. The Rapid StopTM valving combined withpurge sequence timing in the CAMMTM permits a reduction of therecovery portion of an AUTO-purge cycle from a typical 30 secondsto as short as 5 seconds.

Accuracy. The CAMMTM is designed to maintain a measurementaccuracy of ±0.1% of natural full span. For a span of 0 to 0.05 INw.c., this accuracy is equivalent to an output accuracy of ±0.00005IN w.c. differential pressure or ±0.90 FPM velocity.

Continuous Display of Process. All CAMMsTM are equipped witha 4x20 backlit liquid crystal display (LCD) for use during theconfiguration and calibration process, and to display four lines ofoutput data (Flow, Temperature, Absolute Pressure, or SpecialFunction) during normal operation, with each line individuallyscalable in user selectable units of measure.

Special Functions Capability. Built into the CAMMTM micro-processor is the capability to perform special application functionsinvolving two transmitters. Using a second transmitter as an input,the CAMMTM can compute the sum of, or differential between thetwo measured flows. The special function output can be bothdisplayed and provided as an analog output signal.

Microprocessor Based Functionality. The CAMM'sTM on-boardmicroprocessor performs the functions of operating parameterselection, transmitter configuration, input/output and display signalscaling, density correction, and transducer calibration. Input to themicroprocessor is via pushbutton.

High Turndown Ratio Operation. The CAMMTM, with its highlevel of accuracy and automatic zeroing circuitry, can maintain linearoutput signals on applications requiring flow measurementturndown of 10 to 1.


Installation Guide

Ambient Temperature

• 40ºF to 120ºF.• For ranges above or below this ambient temperature, use of panel

heater and/or cooler is required.

Accumulator Tank (strongly recommended)

• Requires coalescing filter, pressure regulator, and check valve atthe tank inlet.120 gallons – All CA stations.120 gallons – Multiple VOLU-probes having a combined length

greater than 10'. 80 gallons – One or more VOLU-probes having a combined

length less than 10'.

Line from Accumulator Tank to AUTO-purge Panel

• 25' maximum length, ¹/₂" pipe (minimum).• Recommend locating accumulator tank as close as possible to

CAMSTM Panel.

Electrical Power Requirement

• 54VA at 24VAC; 48VA at 24VDC; 108VA at 120VAC.• 120VAC, 10 amp when an optional enclosure heater is installed.

Air Requirement

• 80 to 125 psig at 100 CFM, oil and dirt free.• 1 to 24 purge cycles per day, with a field selectable duration

between 30 and 120 seconds during which compressed air isreleased.

Line Size

• If distance from CAMSTM Panel to Flow Measuring Station orProbes is less than 25', tube size to be ¹/₂" O.D. Wall thicknessno greater than 0.065".

• If distance from CAMSTM Panel to Flow Measuring Station orProbes is 25' to 50', tube size to be ³/₄" O.D. Wall thickness nogreater than 0.065".

• If distance from CAMSTM Panel to Flow Measuring Station orProbes is greater than 50', tube size to be 1.0" O.D. Wall thicknessno greater than 0.065".

Purge Frequency

• Dependent upon the particulate concentration in each application.• Adjustable in hourly increments; once per day the minimum

frequency, and once per hour the maximum frequency.

Purge Cycle Duration

• Dependent on sensing line size, length, and routing.• Minimum: 60 seconds normal; 5 seconds with Rapid StopTM.• Maximum: 150 seconds.

CAMS – Combustion Airflow Management SystemTM

Field Wiring Diagrams

125-009-00 (5/00)

Airflow MetersStationary and Panel Mounted

Ease of Installation. Factory mounted, pre-tubed and calibratedfor ease of field installation. Customer specified signal connectionfittings included.

Indication. Each meter serves as a visual monitor of the HVACsystem and fan operation. Can indicate slipping or broken fan belts,fan off due to overload, closed fire dampers, failing fan bearing,open access door, erratic controls performance, etc.

Custom Scaling. Meter faces custom scaled in user selectablevolume, velocity, and/or pressure engineering units of measure.

Identification Label. Each meter is provided with an applicationspecific, engraved, plastic data plate stating the system, the airflowstation number, and the maximum meter range.

Features

Accuracy. Rated at 70ºF, ±2.0% for 1.0" to 6.0" w.c. range;±3.0% for 0.50" w.c. range; ±4.0% for 0.25" w.c. range.

Temperature Limits. 20ºF to 140ºF Operating.

Overpressurization Limit. –20" Hg to 15 psig on either side ofdiaphragm.


125-105 (9/97)

Airflow Meters



Stationary Meter

Type. Stationary.

Gauge. Diaphragm activated, differential pressure.

Enclosure. Anodized aluminum, NEMA 1.

Signal Fittings. Standard barbed fittings for ¹/₄" O.D. tubing.Other fittings available.

Display. Custom, dual scaled display of process.

Meter Panel

Type. Door mounted (minimum of two meters per panel).

Gauge. Diaphragm activated, differential pressure.

Enclosure. NEMA 1 steel with polyurethane paint finish.

Signal Fittings. Standard barbed fittings for ¹/₄" O.D. tubing.Other fittings available.

Display. Custom, dual scaled display of process.


Stationary Meter. Provide where indicated a stationary meterconsisting of a dual-scale, diaphragm-actuated, differential pressuregauge mounted in an anodized aluminum enclosure. Gauges to becustom scaled to read in user selected volume, velocity, and/orpressure units of measure. Meter to be complete with internaltubing, [specify type] signal connection fittings, wall mountingbrackets, and furnished with a plastic data plate listing the system,the airflow station number, and the maximum scheduled air volume.

The meter shall be the Stationary Meter as manufactured by AirMonitor Corporation, Santa Rosa, California.

Meter Panel. Provide where indicated a meter panel consistingof multiple dual-scale, diaphragm-actuated, differential pressuregauges mounted in a NEMA 1 steel enclosure. Gauges to be customscaled to read in user selected volume, velocity, and/or pressureunits of measure. Meter to be complete with internal tubing,[specify type] signal connection fittings, wall mounting brackets,and furnished with a plastic data plate listing for each gauge, thesystem, the airflow station number, and the maximum scheduledair volume.

The central panel shall be the Meter Panel as manufactured by AirMonitor Corporation, Santa Rosa, California.

Stationary Meter Meter Panel


SUBMITTAL SHEET


SUB-Q003, Rev. 2 (6/04)

CONTINUOUS PROTECTIVE PURGEFLOW TRANSMITTER

THEORY OF OPERATION

A regulated constant volume of purge air is introduced insensing lines. When any resistance to flow occurs, constantvolume purge circuit wil l create an equal amount of backpressure to overcome this resistance. Velocity pressuresensed at airflow station is reproduced as a back pressure atflow transmitter by purge air. Sensing lines are filled withpurge air, thereby keeping lines free of duct effluent.

Since each sensing line can have an unequal resistance, systemrequires initial zeroing to achieve zero differential pressure at thetransmitter. This is accomplished by adjusting the amount of purgeair in one of the two legs of the sensing lines. Adjustment is madeuntil true differential is achieved at transmitter. No flow or pressurecondition in duct must exist for initial zeroing.

FLOW CALIBRATION PROCEDURE

1. Verify high and low signal input lines are connected to flowelement and have zero input pressures. (Zero flowcondition.)

2. Connect a calibration gauge PI-CAL as shown.

3. Open HV-1 to provide pressure to purge generator PY-1.Set PRV-1 to obtain a reading of 5 PSI at PI-1.

4. Check calibration gauge for zero differential after 15 or moreseconds to see if balancing of purge differential pressure isrequired.

5. Adjust the V.R. screw CW or CCW until you have a reading asclose to zero as possible.

Caution: Hard tubing is recommended, as any blockage (pinching) of sensing lines can cause over-pressurization damage to thetransmitter.

6.30.2

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