MICRORANGER II

ULTRASONIC LEVEL MONITOR

Instruction Manual

PL-365

November 1992

33453650PRR 2.3

TABLE OF CONTENTS

GENERAL INFORMATION

About This Manual 1 – 1About the MicroRanger II 1 – 1

SPECIFICATIONS

MicroRanger II 2 – 1Programmer 2 – 2Transducer 2 – 2Temperature Sensors (optional) 2 – 3Cabling (optional) 2 – 3

INSTALLATION

MicroRanger II 3 – 1Transducers 3 – 1Programmer 3 – 1Temperature Sensor 3 – 1Interconnection 3 – 2Synchronization 3 – 2Internal Checks 3 – 2

START UP

General 4 – 1Programmer Keypad 4 – 2Parameter Selection 4 – 3 Overview of Start Up 4 – 4Start Up 4 – 5Common Display Messages 4 – 7

FUNCTIONAL

Transceiver 5 – 1Transducer 5 – 1Temperature 5 – 2Sound Velocity 5 – 2Blanking 5 – 2Loss of Echo 5 – 3Relays 5 – 4Analog Output 5 – 6Run / Cal 5 – 6

PL-365 i

APPLICATIONS

Simple Level ApplicationExample 1 6 – 2

Pump Control ApplicationExample 2 6 – 3

High Level SwitchExample 3 6 – 5

Applications with Standpipe 6 – 6

PARAMETER DESCRIPTION

Security 7 – 1Start Up 7 – 1Relay Programming 7 – 2

TROUBLESHOOTING 8 – 1

APPENDICES

Alphbetical Parameter Listing 9 – 1Maintenance 9 – 2Glossary 9 – 3

FIGURES

FIG. 1 MicroRanger II Outline & Mounting 10 – 1FIG. 2 MicroRanger II Layout 10 – 2FIG. 3 ST-25 Series Transducer Outline & Mounting 10 – 3FIG. 4 Temperature Sensors Outline & Wiring 10 – 4

Transducer Mounting FIG. 5 Liquid Applications 10 – 5FIG. 6 Solids Applications 10 – 6FIG. 6A Easy Aimer Kit Installation 10 – 7FIG. 7 Typical Volume Applications 10 – 8FIG. 8 Typical Solids Applications 10 – 9FIG. 8A Typical Solids Applications (cont’d) 10 – 10FIG. 8B Typical Solids Applications (cont’d) 10 – 11FIG. 9 Wiring Formats 10 – 12FIG. 9A Wiring Formats (cont’d) 10 – 13FIG. 9B Wiring Formats (cont’d) 10 – 14FIG. 10 MicroRanger II Schematic 10 – 15

PL-365 ii

GENERAL INFORMATION

ABOUT THIS MANUALIMPORTANT

It is essential that this manual be referred to during installation and start up of the MicroRanger II.

The Start Up section outlines the start up procedure for the MicroRanger II. It highlights the programmerkeypad, parameter entry, common display messages and the first four required parameters; all you need todo to get the MicroRanger II to give a measurement display suitable to your application.

The Applications section provides a general description of the common applications found in industry andillustrates them with examples. It is suggested that you refer to the sub-section which most suits yourapplication. The programming may be further optimized by referring to the Parameter Description section.

ABOUT THE MICRORANGER II

The Milltronics MicroRanger II is a single point ultrasonic level monitoring system consisting of a MicroRangerII in a polycarbonate enclosure, a removable programmer and an ST-25 transducer. The unit can beprogrammed to provide relay and analog outputs from the on-board circuitry.

The MicroRanger II emits an ultrasonic signal via the transducer. The echo is reflected from the material andreceived by the transducer. The echo is processed by the MicroRanger II and the time at which the ultrasonicpulse hits the level or target is extracted and compared to the time at which it was sent. This time differentialis then converted into distance or material level as a basis for display, relay control and analog output.

It features quick start up, fast measurement response and reliable operation in harsh environments. The unitcomes standard with an LCD display, two alarm / control relays and 0 or 4 to 20mA output.

PL-365 1 – 1

SPECIFICATIONS

MICRORANGER II

Power : › 100/115/200/230 V ±15%, 50/60 Hz, jumper selective› 12/24 V DC (optional)› 15 VA

Power fuse : › 100/115 V › 1/4 amp MSL Slo-Blo or equivalent › 200/230 V › 1/8 amp MDL Slo-Blo or equivalent

Range : › 0.3 m (1ft) to 4.6 m (15 ft) under average measurement conditions

Accuracy : › 0.25% of range to a maximum of 6 mm (0.24")

Resolution : › 0.1% of range to a maximum of 2 mm (0.08")

Memory : › EEPROM (non-volatile) no back-up battery required

Programming : › via removable programmer

Displays : › 1 Liquid Crystal Displays of 4 digits, 18 mm (0.7") high

Operating temperature : › – 20 to 50 °C (– 5 to 122 °F)

Temperature compensation : › temperature sensor input› error: › without temperature sensor: 0.17% / °C

› with temperature sensor: 0.09%

Outputs : transducer drive : › 41 KHz, 300 V peak pulses of max. 1 msec duration, typically

› max. repetition rate of 400 msec/transmit

analog : › range : 0 - 20 or 4 - 20 mA› span : proportional or inverse› resolution : 0.5% of analog range› maximum loading : › 350 Ω, return to ground

› 750 Ω, return to – 12 V

relays : › 2 alarm/control relays› 1 form ‘C’ SPDT contact per relay, rated at 5 A at

220 V AC non-inductive› all relays are certified for use in equipment where the short

circuit capacity of the circuits in which they are connected is limited by fuses having ratings not exceeding the rating of the relays.

Enclosure : › NEMA 4 construction› 160 mm W x 240 mm H x 82 mm D

( 6.4" W x 9.5" H x 3.2" D)› polycarbonate

94/09/19PL-365 2 – 1

Shipping weight : › 1.8 Kg (4 lb)

PROGRAMMER

Enclosure : › general purpose › 67 mm W x 100 mm H x 25 mm D

(2.6" W x 4" H x 1" D)› ABS plastic

Operating temperature : › – 20 to 50 °C (– 5 to 122 °F)

Battery : › 9 V battery (style - ANSI/NEDA 1604)

Shipping weight : › 150 g (0.3 lb)

TRANSDUCER

Model : › ST-25 series

Measurement range : › 0.3 to 4.6 m (1 to 15 ft) under average measurement conditions

Temperature range : › – 40 to 93 °C (– 40 to 200 °F) *

Frequency : › 44 KHz

Beam angle : › 12°

Weight** : › 0.9 Kg (2 lb)

Construction : › CPVC housing with polyurethane face Optional faces :› CPVC : for corrosive applications› Teflon (flange mounted transducers only) : for highly corrosive

applications› Polyethylene foam: for dusty, non-condensing applications

› 1" NPT mounting/conduit connection› optional flange mounting, standard sizes:

4", 6", 8" and 12" (metric sizes also available)› totally encapsulated

Separation : › 365 m (1200 ft) from MicroRanger II under specified conditions (see Cabling)

Approvals : › CSA and FM***

* maximum ambient temperature for polyethylene foam facing is 77 °C (170 °F)** approximate shipping weight of transducer with standard cable length and unflanged*** approval pending

PL-365 2 – 2

TEMPERATURE SENSORS (optional)

Resistance : › 9.6K ohm (nominal) at 20 °C ±5K ohm temperature variance

Separation : › 365 m (1200 ft) from MicroRanger II under specified conditions. Refer to Cabling.

Model : TS-2 : › range : › – 40 to 93 °C (– 40 to 200 °F)› construction : › PVC body

› totally encapsulated› approvals: › CSA and FM› shipping weight : › 0.5 Kg (1 lb)

LTS-1 : › range: › – 40 to 93 °C (– 40 to 200 °F) › construction: › 304 stainless steel

› totally encapsulated › for corrosive environments

› approvals: › FM› shipping weight : › 0.7 Kg (1.5 lb)

LTS-1C : › range: › – 40 to 93 °C (– 40 to 200 °F) › construction: › 304 stainless steel

› totally encapsulated› for corrosive environments

› approvals: › CSA› shipping weight : › 0.7 Kg (1.5 lb)

CABLING (optional)

Transducer : › RG-62U coax or equivalent› must be run separately in grounded

metal conduit

Temperature Sensor : › Belden 8760, 1 pair shielded/twisted, 18 AWG or equivalent

PL-365 2 – 3

INSTALLATION

MICRORANGER II

The MicroRanger II should be mounted in an area that is: within the ambient temperature range and issuitable for the specified enclosure. The front cover should be accessible for programming and viewing.

It is advisable to keep the MicroRanger II away from high voltage or current runs, contactors and SCR control drives.

Do not mount the MicroRanger II in direct sunlightwithout the use of a sun shield

Refer to FIG. 1 for Outline and Mounting dimensions.

TRANSDUCERS

Wiring of transducer cable must be done in conjunction with approved conduit, boxes and fittings and to procedures in accordance with all governing regulations.

All transducer cabling must be run in grounded metal conduit for optimum noise immunity.

Refer to FIG. 3, ST-25 Transducer Outline and Wiring

1. Mount the transducer above the highest anticipated material level by at least 30 cm (1 ft).

2. Install the transducer so that it will have a clear sound path perpendicular to the liquid surface (refer to FIG. 7), or toward the draw point at the bottom of the bin in solids applications (refer to FIG. 8).

3. To avoid false echoes, install the transducer such that the sound path will not intersect vessel fillspouts, rough vessel walls, ladders etc. (refer to FIG. 8).

PROGRAMMER

In order to calibrate the MicroRanger II, a programmer (which has a magnetic back plate) must be set into thefront cover recess of the MicroRanger II. It can be removed when operating in the Run mode. Be sure tokeep it away from objects, such as floppy discs, that are susceptible to damage from magnetic fields. (Note: since a programmer need not be ordered with each unit, check your order if you think that theprogrammer is missing).

TEMPERATURE SENSOR

Refer to FIG. 4.

PL-365 3 – 1

INTERCONNECTION

All wiring must be done in conjunction with approved conduit, boxes and fittings and to procedures in accordance with all governing regulations.

Refer to FIG. 9 for wiring of power, transducer and temperature sensor to the MicroRanger II.

SYNCHRONIZATION

In applications where up to eight MicroRanger II’s are to be installed in close proximity or their transducercables will be in a common run, synchronization is required. When synchronized, no transceiver will transmitwithin 600 msec of another.

To synchronize the MicroRanger II with other Milltronics ultrasonic level monitors (e.g. MultiRanger,MicroRanger, LiquidRanger, etc. ...), consult with Milltronics or your distributor.

Refer to FIG. 9 for details on synchronization wiring.

INTERNAL CHECKS

› make sure that all wiring is securely fastened and to the proper terminals.› Make sure that voltage stab connector, J7, is properly set for either 100, 115, 200 or 230 V AC operation.

› Power fuse, must be installed.

› Make power connection. Be sure that wires are securely fastened and to proper terminals.

Do not operate with grounding (earthing) disconnected.

93/03/01PL-365 3 – 2

START UP

GENERAL

The MicroRanger II has two modes of operation: Run and Calibrate. When the unit is powered up, afterinstallation procedures have been completed, it is factory set to start up in the run mode, to detect thedistance from the transducer face to the target in metres. This is the normal mode of operation which canalso be programmed to display level and yield corresponding analog output and relay closures for alarms,pump controls, etc.

The Calibrate mode is used for programming the operational parameters to suit the user’s preferences andthe particular application to which the MicroRanger II will be applied. All access to the MicroRanger II is donevia the programmer when set in the front cover recess. The mode of operation is toggled between Run andCalibrate at the user’s need by pressing .

The first step when calibrating is to reset all parametersto their factory setting. Refer to Parameter Description\P-99.

When the calibration has been completed, the MicroRanger II can be made to simulate its operation; givingdisplay, alarms and analog output. Refer to Parameter Description \ P-76.

Once satisfied that the parameters have been properly entered, the unit may be put into the Run mode.

Unsatisfactory response in the Run mode, after programming, may indicate that the transducer’s aimingrequires adjustment (especially in solids applications). Refer to FIG. 6 and 8.

RUNCAL

PL-365 4 – 1

PROGRAMMER KEYPAD

All entries are made via the programmer keypad.

Key General Function

Calibrate Mode Run Mode

numeric entry

numeric entry

numeric entry

numeric entry

numeric entry

numeric entry

numeric entry

numeric entry

numeric entry

numeric entry

decimal point entry

negative entry

clear display

completes access into

enter Run mode initiates access into Cal mode

press to make a

Cal mode

measurement

enters display as contents ofselected parameter

0

1

2

4

5

6

7

9

8

3

RUNCAL

MEAS

CLR

ENTER

decrements display to showthe preceding parameter

increments display to show the next parameter

ALTDISP

alternates display to showeither the parameter numberor parameter contents

PL-365 4 – 2

PARAMETER SELECTION

To enter Calibrate mode

To enter the Calibrate mode from the Run mode, press and then .

To directly access a parameter :

With display showing

enter desired parameter number

To set a parameter :

Once the desired parameter has been obtained on the display,

Press

This will cause the display to show the content of the selected parameter. The content may be changed to anew value or code by pressing the desired numbers and then .

After a minute and a half, the content display will revert to the parameter number if the keypad is not usedfurther. Press again if it is desired to return to a display of the content.

To select the next parameter :

Press

The display will show the new parameter number, and then the parameter content if a display of the contentwas in effect for the previous parameter.

To reset a parameter to its factory value :

Press

display parameter content

Press

display will go blank

Press

factory setting of selected parameter is displayed and automatically entered.

ALTDISP

ALTDISP

ALTDISP

ENTER

ENTER

CLR

RUNCAL

PL-365 4 – 3

OVERVIEW OF START UP

Outlined below are the progamming steps required to complete the start up, after properinstallation, wiring and powering of your MicroRanger II.

select mode of measurement preferred

select unit of measurement preferred

enter distance from transducer face to the empty level

enter the span of measurement; empty to full level

These steps are detailed parameter by parameter on the following pages.

LEGEND

Press the associated key on programmer :

Display shown on MicroRanger II :

Display appears for a short time :

Programmer key : ENTER

PL-365 4 – 4

START UP

Apply power to the MicroRanger II and place the programmer in the front cover recess. Run will bemomentarily displayed and then a reading of space up to approximately 4.6 m (15 ft) will appear.

If is displayed rather than a continuous numeric reading, the actual material distance may bebeyond 4.6 m (15ft). Proceed with the programming and if persists, refer to Troubleshooting.

If / is alternately displayed, an open or short circuited transducer connection is beingindicated.

will be displayed

if is not pressed within a minute and a half of initially pressing , the CAL display will revert tothe run mode.

P - 1 mode of measurement

1 = material

2 = space

3 = high level switch

e.g.

reading to be measurement of material level

P - 2 units of measurement

1 = feet

2 = metres

3 = inches

4 = centimetres

* = percent

e.g.reading in % of span,programming in centimetres

RUNCAL

RUNCAL

1

4

ENTER

ENTER

ALTDISP

PL-365 4 – 5

P - 3 empty distance to transducer

factory setting, maximum emptydistance = 457.2 cm

enter actual distance

e.g.

actual empty distance = 400 cm

P - 4 span

factory setting, maximumspan = 457.2 cm

span = 300 cm

when programming is completed

e.g. level of material = 67% of span

RUNCAL

0

ENTER

3 0

0

ENTER

4 0

PL-365 4 – 6

COMMON DISPLAY MESSAGES

Display Message Comment

cable loss of echo indicates open or short circuited transducer connection

have initiated access into appears after pressingCalibrate mode

clear all parameters - P-99 master resetreturn to factory setting

loss of echo displayed in Run mode to indicate loss of echo

parameter number indicates which parameter is being displayed

percent appears when calibrating units of measurement in percent

have entered Run mode appears after pressing

no value contents of parameter empty or no reading display

spare parameter

RUNCAL

RUNCAL

PL-365 4 – 7

FUNCTIONAL

TRANSCEIVER

The MicroRanger II transceiver operates under 1 of 4 sets of fixed conditions (P-18) that are summarized as follows.

where: A = area lg= longL = largest s = shortF= first

When a measurement is initiated, the set number of pulses are transmitted. Neon lamp L1 will flash for everypulse that is transmitted. Short pulse only measurements (P-18 = 0) are restricted to the first 2 m (6.6 ft)range extending from the transducer face. When a short pulse is combined with a long pulse (P 18 ≠ 0) theshort pulse range is restricted to 1m (3.3 ft) and the long pulse covers the full measurement range of theMicroRanger II.

When the echo from the transmitted pulse set is received, the relevant echo extraction technique is applied todetermine the true material echo. The ‘ALF’ technique analyzes three echo characteristics: area, largest inheight and first. From this analysis, the echo most likely to corresponding to the true echo is chosen.

The measurement response limits the maximum rate at which the display, analog output and relay contactswill respond to the change in measurement. It is of concern especially where liquid surfaces are in agitation ormaterial falls into the sound path during filling. When in the Calibrate mode, the response rate isautomatically increased to give immediate response when "MEAS" is pressed.

*Refer to Installation\Synchronization.

TRANSDUCER

The transducer converts the electrical energy of the transmit pulse from the transceiver into acoustical energyand converts the acoustical energy of the echo back into electrical energy for the transceiver receive period.

The effective acoustical energy is generated from the face of the transducer and is radiated outward,decreasing in amplitude at a rate inversely proportional to the square of the distance. Maximum power isradiated axially (perpendicular) from the transducer face in a line referred to as the axis of transmission.Where power is reduced by half (– 3 dB), a conical boundary defining the sound beam, centered about theaxis of transmission is established. The diametric measurement of the cone in degrees defines the beamangle. Impedance matching techniques are used to optimize the transfer of power from the transducer into airand from the air back into the transducer.

code range pulses per measurement echo

(P-18) m (ft) measurement response synchronization* extraction

0 2 (6.6) s immediate no F

1 4.6 (15) s + lg 2 m/min yes ALF

2 4.6 (15) s + 2 lg 1 m/min yes ALF

3 4.6 (15) s + 2 lg 0.5 m/min yes ALF

PL-365 5 – 1

TEMPERATURE

The MicroRanger II comes factory set with a jumper across TB1- 7/8 to simulate the temperature programmedinto P-65 (factory set for 20 °C). By removing the jumper and installing a temperature sensor, automatictemperature compensation is provided (refer to FIG. 9).

In order to compensate for uniform temperature changes of the sound medium over time, temperaturesensing should be used. This will allow the MicroRanger II to more accurately measure the physical distanceswhen the medium is subjected to temperatures other than 20 °C. The expected error due to temperaturechanges will decrease from 0.17% of the transducer to material distance per Celsius degree over theoperating range to 0.09% of the measurement.

A temperature sensor, when used, should be mounted in a location which represents the temperaturefluctuations likely to occur between the transducer and the target. Avoid mounting the temperature sensor indirect sunlight as radiant heating can cause a pronounced difference between the air and the sensortemperatures.

Any one of the three temperature sensor models can be used with the MicroRanger II. The followinghighlights the more important characteristics which have a bearing on their selection. Refer to Specifications \Temperature Sensors for detailed specifications.

TS-2 : CPVC encapsulated, CSA and FM approvalLTS-1 : stainless steel, FM approvalLTS-1C : stainless steel , CSA approval

If the sound medium’s ambient temperature is to remain constant, compensation may be programmed into theMicroRanger II instead of using a temperature sensor by :

› selecting P-61› performing an empty calibration

SOUND VELOCITY

The MicroRanger II can be calibrated to correct for transducer operation in homogenous fixed temperaturevapours with sound velocities other than that of air.

The basis is to physically measure the level (measuring tape or sight glass) and enter this value via P-61. TheMicroRanger II then calculates the sound velocity by comparing the entered physical measurement to its ownultrasonic measurement (empty calibration, P-61).

BLANKING

Near blanking (P-5) is used to ignore the zone in front of the transducer where ringing or other false echo is ata level that interferes with the processing of the true echo. The minimum near blanking is factory set, but canbe overridden by entering the desired amount into P-5.

Ringing is the inherent nature of the transducer mass to continue vibrating after the transmit pulse hasceased. The amount of ringing varies with the type of transducer used and decays to acceptable levels in theorder of milliseconds. Excessive cold and over tightening of the transducer mounting (refer to FIG. 3) willincrease the ring time such that it may appear as an echo during the receive cycle. This is usually indicatedby an incorrect high level reading. This condition may be overcome by increasing the near blanking.

93/06/09PL-365 5 – 2

Far end blanking is a feature that ignores the zone below the zero or empty level where false echoes mayappear at levels that interfere with the processing of the true echo.

In applications where the zero level is above the bottom of the vessel and it is desired to monitor the zonebelow the normal zero, range extension (P-6) may be used to extend the range into the far end blanking.Range extension is entered as a percent of P-3. As range extension reduces the protection afforded by the farend blanking, it should be used judiciously. Avoid excessive range extension as this may reduce themeasurement’s reliability and accuracy. Range extension is factory set for 20% of P-3. If it is found that falseechoes are appearing ahead of the blanking zone, P-6 should be reduced accordingly.

Blanking is automatically corrected for sound velocity change where temperature and velocity compensationare used; keeping the blanking at the distance at which it was entered.

LOSS OF ECHO

A loss of echo occurs when the microprocessor deems that the calculated measurement is unreliable. Thismay be due to such circumstances as electrical noise, poor grounding or poor transducer aiming. Refer toTroubleshooting. If the condition persists for a time beyond the limit as set by the fail-safe timer (P-16), thenthe display will begin to alternately flash and a default measurement (P-15). The defaultmeasurement will be forced to the 0% (fail-safe low) or 100% (fail-safe high) of span value at themeasurement response rate (P-18).

If the loss of echo is due to an open or short in the transducer circuit, the display will immediately flash / and the last measurement in alternating fashion. The default measurementwill be immediately forced to the 0% (fail-safe low) or 100% (fail-safe high) of span level after the fail-safetimer has expired.

The relays and analog output will respond to the default reading. Refer to Relays and \ Analog Output.

Upon receiving a reliable echo, the loss of echo condition will be aborted and the reading will move to thepresent level at the measurement response appropriate to the operating profile chosen (P-18).

92/03/25

ringing true echo(level)

false echo

typical receiver signal

end of transmit,transducer face

0level

far end blanking

range extension (P-6)as % of P-3

empty distance to transducerP-3

P-5 near blanking

range

typical processed signal

PL-365 5 – 3

RELAYS

GENERAL

Two on board relays are provided in the MicroRanger II. Each relay may be assigned one out of three functions.

Functions

high alarm : alarm On status occurs when the level rises to the On setpoint and returns to normalwhen a level of 5% or more of span below the On setpoint is reached.

low alarm : alarm On status occurs when the level lowers to the On setpoint and returns to normalwhen a level of 5% or more of span above the On setpoint is reached.

control : › down : control down status occurs when the level rises to the On setpoint and returns to normal when the level lowers to the Off setpoint.

› up : control up status occurs when the level lowers to the On setpoint and returns to normal when the level rises to the Off setpoint.

Setpoints

The setpoints are measured outward from the face of the transducer and are always entered in the linearunits of measurement selected in P-2 (not %)

For the control function :

› if the On setpoint is closer than the Off setpoint, the relay functions as a control down.

› if the On setpoint is farther than the Off setpoint, the relay funtions as a control up.

RELAY STATUS

Fail-safe

When the fail-safe timer expires, the relays will respond as follows :

Calibrate

Upon entering the Calibrate mode, the relays holds their prior status but respond to measurements takenwhen is pressed.

FAIL-SAFE MODE RELAY STATUS

P-15 high alarm low alarm control down control up

fail-safe high On Off On Off

fail-safe low Off On Off On

MEAS

PL-365 5 – 4

Simulation

Parameter P-76 can be used to simulate relay operation in the Calibrate mode. Relays programmed forcontrol function do not respond to simulation.

If the relay status can affect plant operation or personnel safety, it is advisable to override the relay functions

or disconnect the relay wiring.

Keep power disconnected at main breaker when MicroRanger II cover is removed.

PROGRAMMING

n/a = not applicable Hi = high alarm Lo = low alarm Cntl = control

Complete programming of each relay requires two steps :

1 : To select a relay function, select a function parameter and enter the desired function.

2 : To enter a setpoint, select a setpoint parameter and enter the desired distance.

94/09/19

RELAY 1 RELAY 2

Function Setpoints Function Setpoints

P-9 P-10 P-11 P-12 P-13 P-14

Hi On n/a Hi On n/a

Lo On n/a Lo On n/a

Cntl On Off Cntl On Off

e.g. relay 1

press until desiredfunction is displayed

press to enterdisplayed function

ENTER

ALTDISP

PL-365 5 – 5

ANALOG OUTPUT

The MicroRanger II can be programmed to provide an analog output (P-7) range of 0 to 20 or 4 to 20 mA, andfor proportional or inverse span. The 4 and 20 mA levels can be trimmed slightly via P-97 and P-98respectively to compensate for any offset between the MicroRanger II and the customer’s equipment.

The analog output responds in the following manner :

n/a = not applicable

STATUS

Fail-safe

When the fail-safe timer expires, the analog output level will respond in its normal manner to the defaultfail-safe levels; high or low.

Calibration

Upon entering the Calibrate mode, the analog output holds its prior level but responds to measurements takenwhen is pressed.

Simulation

Parameter P-76 can be used to simulate the analog output operation in the Calibrate mode.

If the analog output signal can affect plant operation or personnel safety. It is advisable to override the signal or disconnect the wiring.

Keep power disconnected at main breaker when MicroRanger II cover is removed.

RUN / CAL

When mode of operation is changed from Run to Calibrate, the transceiver stops operating. As a courtesy theunit will automatically access the last parameter addressed and display it. The last measurement is storedand its reading, alarm status and analog output levels are frozen. If is pressed, the MicroRanger II willreact as if it were momentarily placed in the Run mode. Otherwise, it can not respond to changes in levelwhile in the Calibrate mode.

When the mode of operation is changed from Calibrate to Run, the transceiver resumes its operation. Thereading displayed will be that of the last measurement taken, either during the previous Run mode or while inthe Calibrate mode. The reading will change at a rate controlled by the measurement response of theprocessing parameter (P-18).

92/03/25

ANALOG Mode of Measurement, P = 1

OUTPUT 1 (material) 2 (space) 3 (h.l.s.)

responds to material level material distance material distance

if P-7 = 0 off off n/a

if P-7 = 1 or 2, full empty n/a

reads 20 mA when

if P-7 = 3 or 4, empty full n/a

reads 20 mA when

MEAS

MEAS

PL-365 5 – 6

APPLICATIONS

This section highlights the most common applications to which the MicroRanger II can be applied. Otherapplications not listed here may be akin to those listed or a combination thereof (e.g. monitoring pistonposition on a wood pulverizer is in essence a level application).

When programming, refer to the application which is most similar to yours. A practical example has beengiven to further expand on the programming features. As the example may not cover all facets of theparticular application, the user should become familiar with the parameters available. Refer to Parameter Description.

The minimum distance from the transducer face to the target is limited by the minimum near blanking value (P-5) of 30 cm (1ft).

PL-365 6 – 1

SIMPLE LEVEL APPLICATION

The most common application of the Milltronics ultrasonic level measuring systems is for simple levelmonitoring, whereby the material level or space between the transducer and reflecting surface is measuredand displayed. This may or may not include alarms and mA output.

EXAMPLE 1

The application is to obtain levelmeasurement and a corresponding 4 - 20 mAoutput proportional to material level in a bin.The transducer face is 15 ft from the binbottom. The empty level will be at 0 ft(bottom) and the full level will be at 14 ft fromthe bottom (span). A high alarm is requiredat 4 ft from the top and a low alarm isrequired at 3 ft from the bottom (12 ft fromthe top). In the event of a loss of echo, theMicroRanger II is to go into fail-safe low after2 minutes.

select:

P-1 enter option "1", material level

P-2 enter option "1", units in feet

P-3 enter "15", empty distance to transducer

P-4 enter "14", span

P-5 enter "1", blanking distance, 15’ - 14’ = 1’

P-7 enter code "2", 4 - 20 mA output

P-8 enter "2", display maximum 2 digits after decimal

P-9 enter " HI ", relay 1 - high alarm function

P-10 enter "4", relay 1 - alarm ON

P-12 enter " LO ", relay 2 - low alarm function

P-13 enter "12", relay 2 - alarm ON

P-15 enter option "2", fail-safe low

P-16 enter "120", fail-safe timer - 2 min. (120 sec)

Press : to re-enter Run mode

14 ’Span

4 ’Highalarm

12 ’Low alarm

15 ’empty

distance

1 ’ blanking

RUNCAL

PL-365 6 – 2

PUMP CONTROL APPLICATION

The basic difference between a simple level application and a pump control application is that the relaysassigned to pump function are normally in a de-energized state and are energized when pumping is required.

When in the Calibrate mode, pump relays will be held de-energized (OFF). In the event of a loss of echocondition, the pump relays will respond to the fail-safe default value. Refer to Functional \ Relays.

The mA output, however, will remain at its prior value but will respond to measurements taken when ispressed.

EXAMPLE 2

The application is to control the level in a wet well 3metres deep. It is required that :

• the level be displayed in metres

• a pump down control -

start pumping at 0.5 m from the transducer facestop pumping at 2.5 m form the transducer face

• the transducer to be mounted 3.3 m from the bottom of the wet well

• the span of level in the well to be 3 m

• in the event of loss of echo, go into fail-safe low after 30 seconds to protect pumps

select :

P-1 enter code "1", material level

P-2 enter code "2", units in meters

P-3 enter "3.3", empty distance to transducer

P-4 enter "3", span

P-5 enter "0.3", near blanking distance, 3.3 m - 3.0 m = 0.3 m

P-6 enter "20", range extension (factory setting)

P-8 enter "2", display max. 2 digits after decimal

P-9 enter "Ctrl", relay 1 - control function

P-10 enter "0.5", relay 1 - pump ON

P-11 enter "2.5", relay 1 - pump OFF

P-15 enter option "2", fail-safe low to protect pumps

3 mspan

0.5 mpump on

0.3 m blanking

2.5 mpump off

3.3 mempty

distance

MEAS

PL-365 6 – 3

P-16 enter "30", fail-safe timer at a max. draw rate of 0.2 m/min, this would protect pumps. If a loss of echo occurred at 0.5 m, after 30 sec. the level would equal thatof acceptable low level alarm and the pump would shut off

P-18 enter code "2", operating profile - 1m/min response rate

press : to re-enter Run modeRUNCAL

PL-365 6 – 4

HIGH LEVEL SWITCH

The application allows the MicroRanger II to act as a high level switch. The important difference between thisand a simple level application is that if the material being measured drops beyond range, the MicroRanger IIwill default to its maximum range reading and not to a loss of echo condition.

The transducer should be aimed so that it is perpendicular to the angle of repose at the alarm level.

EXAMPLE 3

A high level switch is required in a silo when the materiallevel comes to within 2 ft of the transducer face.

perform :

P-99

select :

P-1 enter code "3", high level switch

P-9 enter " HI ", relay 1 - high alarm

P-10 enter "2", relay 1 - alarm ON

press : to re-enter Run mode

2’ high level alarm

RUNCAL

PL-365 6 – 5

APPLICATIONS WITH STANDPIPE

In many liquid applications, access to the vessel must be made via a standpipe. In such cases, Milltronicscan provide flange mounted transducers that will readily mate to the flanged standpipe (refer to FIG. 7).Another option is to hang the transducer from a blind flange.

The standpipe length should be as short and the diameter as large as possible. As a rule of thumb, the -3 dBcone of the sound beam should not intersect the standpipe wall in applications opening into a vessel.Otherwise, additional near blanking (P-5) will be required to compensate for the interference zone created bythe opening. Refer to Specifications \ Transducers or Appendices \ Glossary .

transducerradiatingsurface

nointersection transducer

radiatingsurface

sound beamintersectspipewall

reflection atinterference zonecreated by opening

vessel

vessel

near blanking extension of 150 mm (6")past end of standpipe may be required

novessel

no additionalblanking required

no additionalblanking required

PL-365 6 – 6

PARAMETER DESCRIPTION

NOTE: › (F) indicates P-99 parameter factory setting, where applicable. For reference only - factory setvalues may change with software revisions.

› (V) indicates parameter can be viewed only, not entered

P-0 security

this parameter can be used to secure the content of parameters P-01 through P-99 so that theycan not be changed. This however does not prevent the parameters from being selected andviewed.

Security is ON if the content of P-00 is any value other than 1954. P-00 can only be directaccessed.

enter: 1954 = security OFF 1954 = security ON

P-1 mode of measurement

enter 1 = material level 2 = space measurement (F)3 = high level switch

P-2 units of calibration and display

entering this parameter will set the associated units for parameters3, 4, 61 and 76.

enter 1 = feet 1 * = calibrate in feet, display in %2 = meter (F) 2 * = calibrate in meters, display in %3 = inches 3 * = calibrate in inches, display in %4 = centimeter 4 * = calibrate in centimeters, display in %

NOTE: For % display, entry must be made as " # * " and will be displayed as ‘ # P ‘.

P-3 empty distance to transducer

enter distance. (F= 4.572)

P-4 span

distance from empty (0%) to full (100%) level. ( F = 4.572 )

enter desired amount

PL-365 7 – 1

P-5 blanking (refer to Functional \ Blanking)

enter distance required, in units as set in P-2 ( F = 0.300 )

P-6 range extension

used to extend the measurement range into the far end blanking. Refer to sectionFunctional \ Blanking.

enter, as a percent of P-3, the distance below 0 not blanked (F=20)

P-7 analog output

enter 0 = off1 = 0 to 20 mA2 = 4 to 20 mA (F)3 = 20 to 0 mA4 = 20 to 4 mA

P-8 decimal point location

The number of digits after the decimal will automatically reduce to avoid display overflow.

enter 0 = no digits after decimal1 = one digit after decimal (F)2 = two digits after decimal

Parameters P-9 to P-14 are further described in Functional \ Relay.

P-9 relay 1 - function

select : OFFHI (high alarm)LO (low alarm)Cntl (control)

P-10 relay 1 - ON setpoint

enter ON setpoint in units selected in P-2, from face of transducer down.(F= )

P-11 relay 1 - OFF setpoint

enter OFF setpoint in units selected in P-2, from face of transducer down.(F= )

PL-365 7 – 2

P-12 relay 2 - function

select : OFFHI (high alarm)LO (low alarm)Cntl (control)

P-13 relay 2 - ON setpoint

enter ON setpoint in units selected in P-2, from face of transducer down.(F= )

P-14 relay 2 - OFF sepoint

enter OFF setpoint in units selected in P-2, from face of transducer down.(F= )

P-15 fail-safe mode

in the event that a loss of echo condition extends past the time set in the fail-safe timer (P-16), the MicroRanger II will alternately flash and a default measurement corresponding to one of the following modes. Refer to Functional \ Loss of Echo.

enter 1 = high (F)2 = low

P-16 fail-safe timer

the amount of time delay before going into fail-safe mode. Range is 0.001 to 9999. (F=30.00)

enter "desired amount of time", in seconds.

P-17 relay status

during alarm ON or control Up or Down condition, the relay status can be made to alternately flash with the measurement reading.

0 = Off1 = On

P-18 operating profile

93/06/11

range pulses per measurement echom (ft) measurement response synchronization extraction

enter : 0 = 2 (6.6) s immediate no F1 = 4.6 (15) s + lg 2 m/min yes ALF2 = 4.6 (15) s + 2 lg 1 m/min yes ALF3 = 4.6 (15) s + 2 lg 0.5 m/min yes ALF

PL-365 7 – 3

P-61 empty calibration

this provides sound velocity compensation on an empty tank. This is required on a volume application where the atmosphere in the tank is other than air or the atmospheric temperature is constant but other than 20°C and no temperature sensor is being used. (F= )

Empty tank as much as permissible. Leave filled with normal vapour and at normal operating temperature. Refer to FIG. 7.

Press . The MicroRanger II will take a measurement and display the level in the linear unitschosen (not percent). Press at least five times and insure that a stable reading is being obtained.

Enter the actual space or level (P-2).

Press . The MicroRanger II will now calculate the correct sound velocity to be used in future measurements.

P-65 air temperature in °C

as measured by temperature sensor

P-76 measurement and simulation

measurement

Press to view the measurement reading in the CAL mode.

Press to update the ultrasonic measurement.

simulation

Press to simulate the rise and fall of the material level.

The simulation will raise and lower the material level through the calibrated span , P-4.

Pressing during simulation causes the apparent level to rise.

Pressing during simulation causes the apparent level to fall.

Continuous depression of or increases the respective rate of level change.

To end the simulation program, press .

95/05/18

MEAS

ENTER

MEAS

ALTDISP

MEAS

ENTER

ALTDISP

PL-365 7 – 4

P-80 echo confidence (V)

a measure of echo reliability.Press . An ultrasonic measurement will be taken and the echo confidence updated.This feature is useful when aiming the transducer.

short pulse echolong pulse echo

a display of indicates an opened or shorted transducer cable.

P-83 echo strength, in dB above 1 uV (V)

P-84 noise ( V)

average and peak ambient noise in dB above 1 uV rms.

Ambient noise includes acoustical and electrical noise being picked up by the transducer/receivercircuit when the transmit/receive cycles have been disabled during the Calibrate mode.

averagepeak

P-89 software revision number (V)

P-90 memory test (V)

display will momentarily go blank and then show either:

- memory is intact

- RAM failure

- EPROM failure or

- EEPROM failure

93/01/14

MEAS

ENTER

PL-365 7 – 5

P-91 LCD relay test (V)

- all LCD segments should flash- all relays should turn on and off sequentially- press any other key to stop

P-92 mA output test

the mA value from the previous measurement will be displayed or a test value may be entered,ranging from 0.000 to 20.000. The displayed mA value is transmitted as a mA signal from TB1-4/5.

P-93 temperature sensor resistance in K Ω (V)

P-94 transmitter test (V)

the transmitter will fire at a regular rate and the transmit neon L1 will flash correspondingly.Press any other key to stop.

P-95 programmer test (V)

then press each key from left to right starting with the top row.

The display will acknowledge each switch pressed by displaying the following:

KEY DISPLAY KEY DISPLAY

if any switch is pushed out of sequence or malfunctions, the display will show

ENTER

ENTER

ENTER

CLR

RUNCAL

MEAS

ALTDISP

ENTER

2

3

4

5

6

7

8

9

0

1

PL-365 7 – 6

P-96 watchdog reset test (V)

hyphens will flash for 5 seconds or less and then place the MicroRanger II into the Run mode.Should the test fail, the MicroRanger II will not go back into the Run mode.

P-97 trim for 4mA

when this parameter is initially selected, the mA output goes to 4mA. The MicroRanger II,however, will display a typical value of 12. The value can be increased or decreased bypressing or respectively or by entering a value. This will proportionally change themA output value so that remote equipment will read 4 mA.

e.g. : Micro II remote equipment

P-98 trim for 20 mA

when this parameter is initially selected, the mA output goes to 20mA. The MicroRanger II,however, will display a typical value of 214. The value can be increased or decreased bypressing or respectively or by entering a value. This will proportionally change themA output value so that remote equipment will read 20 mA.

e.g. : Micro II remote equipment

P-99 master reset

to reset all parameters to their factory setting.

CLR

ALTDISP

clear all complete

clear all messageENTER

ENTER

1

ENTER

52

PL-365 7 – 7

TROUBLESHOOTING

Transducer location and aiming are the most important factors affecting the reliability of the MicroRanger II.

SYMPTOM CAUSE ACTION

Loss Of Echo (LOE) - open circuit - check transducer wiringneon L1 will flashbut no pulsing will - defective transducer - try a substitutebe felt on transducer or MicroRanger IIface, display will flash LOE

Loss Of Echo (LOE) - short circuit - check transducer wiringneon L1 will be continuously off and - defective transducer no pulsing will be or MicroRanger II - try a substitutefelt on transducer face

display will flash LOE, - application too dusty or steamy - re-aim transducer,neon L1 will flash, under these conditions range refer to transducer installationpulsing is felt on may be adversely affectedtransducer face - use polyethylene foam

faced transducer fordusty applications,do not use on wetapplications

- if condition occurs - increase fail-safe

only during filling timer, P-16

- transducer face covered - inspect and clean, check thatshipping cardboard is removed

- move transducer tobetter location

- mount in standpipe

- transducer location or aiming - re-locate or re-aim transducer- poor installation - refer to transducer installation - moved by material or vibration & mounting diagram- flanging not level

- level or target out - check transducer specificationof range - check parameters

PL-365 8 – 1

Reading Does Not - MicroRanger II processing wrong echo - re-aim transducer,Change, But Level Does i.e. vessel wall, structural member, refer to transducer installation

stationary agitator, material & mounting diagramhang-up or rat-tailing

- transducer ringing, - transducer must not reading high level be in contact with metal

- mounting need only behand tight

- refer to mounting diagram

Reading Consistently - reading offset - check P-3 & P-4Off By Fixed Amount

Reading Error - temp. compensation - install temp. sensor, Progressively Worsens refer to InstallationWith Distance

- sound velocity compensation - P-61

Display Blank, Neon L1 - loss of power - check power wiring, Not Flashing jumpers & fuse.

Display Will Not - programmer improperly - refer to Installation Respond To positioned Programmer

- infra-red window - inspect and cleanobstructed

Reading Erratic - liquid surface agitated - try an operating profile with a slower response, P-18

- relocate transducer

- material filling - relocate transducer- try an operating profile

with a slower response, P-18

- electrical noise - transducer cable must be in grounded metal conduit

- refer to installation &wiring diagram

- try an operating profile with a filter, P-18

Response Slow - try an operating profile witha fast response, P-18.

SYMPTOM CAUSE ACTION

PL-365 8 – 2

air temperature P-65analog output P-7blanking P-5decimal point P-8empty calibration P-61empty distance P-3fail-safe mode P-15fail-safe timer P-16measurement, reading P-76mode of measurement P-1operating profile P-18range extension P-6reading P-76relay 1 - Function P-9relay 1 - Off setpoint P-11relay 1 - On setpoint P-10relay 2 - Function P-12relay 2 - Off setpoint P-13relay 2 - On setpoint P-14relay status P-17reset P-99security P-0simulation P-76span P-4units P-2

ALPHABETICAL PARAMETER LISTING

PARAMETER #

PL-365 9 – 1

MAINTENANCE

The MicroRanger II requires no maintenance. However, a program of periodic preventive maintenanceshould be initiated. This should include regular inspection, general cleaning and good housekeepingpractices.

Enclosures and circuit boards should be cleaned only when the power is disconnected at the main breaker,using a vacuum and clean, dry paint brush. Check all electrical terminals for corrosion and arcing.

If the MicroRanger II is mounted in a dusty or oily environment, make sure that the calibrator and front coverare kept clean, otherwise it may impede the infrared signal transmission required for programming.

It is also a good idea to periodically check the face of the transducer. It should be free of material build-upcorrosion or deformation.

PL-365 9 – 2

GLOSSARY

beam angle : › angle between the opposing one-half power limits (-3dB) of the sound beam

blanking : › zone in which received echoes are ignored.

EEPROM : › electrically erasable programmable read only memory.

EPROM : › erasable programmable read only memory.

LCD : › liquid crystal display.

measurement : › each time a transmit pulse or set number of pulses is sent to the transducer.

ringing : › the inherent nature of the transducer to continue vibrating after the transmit pulse has ceased.

PL-365 9 – 3

MICRORANGER II

OUTLINE AND MOUNTING

160 mm(6.3")

131 mm(5.1")

lid screws6 places

240 mm(9.5")

228 mm(9")

programmer

97 mm(3.8")

82 mm(3.2")

lid, clearpolycarbonate

CSA enclosure 4polycarbonate

customer mounting screw

mounting holes(accessed under lid 4.3 mm(0.17") dia. 4 places

suitable location forconduit entrances

(water tight conduit hubs should beused to maintain the enclosure rating)

Milltronics recommends using a punch for making holes in the enclosure.

FIG. 1

ENTERALT

RUN

DISP

CAL MEASCLR

4

6 7 8

1 2 3

9

5

0

PL-365 10 – 1

MICRORANGER II LAYOUT

FIG. 2

LCD board

mother board

1 2 3 4 5 6 7 8 9 1610 11 12 13 14 15TB1

VOLTAGESELECT

RELAYS SHOWN INDE-ENERGIZED POSITION250 VAC, 5 AMP

PETERBOROUGH ONT.ARLINGTON TEXAS.BROMSGROVE WORCS. ENG

MADE IN CANADA

+ - B

DLHS

LK

WHT

100 5

11

002

032

1/4 AMPSLOBLO

J7

R32

17 18

RL2

SYNC

N12V

HOT

SHL

TRANS mA OUT TEMP

RL1

L1 N GRL2

SEE INSTRUCTION BOOKFOR COMPLETE RATING

FU1

DATA

PETERBOROUGH, ONTARLINGTON, TEXAS

LCD1

CLK

L C D IIMADE IN CANADA

C1 ML 5101438P5V

COM

IC10IC5IC6

J3R33

P1

C8

R14

R34R35

R36R15

R16

C33

C34CR1 C38

IC14IC13

PIN 1

C39

C1 + +C2

IC1

R17

D4R19

D5

R20R21R22

D6

D7

C10

R23

R24

C3

IC2

R3R2R1

C11

R25

R45R44

R46R47R48R49

R40R39

C20 C21

C22IC3

R42R41

BR1

POSITION J5 FOR100/115/200/230VAC OPERATION50/60 HZ 15 VA

MDL FUSE

+

C41

+

C43

C37

CONV1

C42

C40

IC17C36

IC16IC15

DATA

+

R63R62R61

R31

R30

C28

C15

RL2 RL1C18

R11R12R13

D8

TRANS

C17C16

Q3S2

T1

C14

Q5Q7

C25

R53R52

D9C24

D10

R51R50

Q6

R9R10

D2

D1R8

Q1C7

C4R4

C5

R5R6R7

C6

R43

C23

R29R28

C13Q2

R27R26

C12+

+

C32C31

+ZD1

C30R65

D15

D14R64

C29

IC9

Q12R55R56

Q9C27R57

R59R60

Q10 J4

D11

D12

R54C26A

PN 24751322PCB 10E279 R1

INSTRUCTION BKPL365

ML 51026191MICRO II

SLOBLO MDL FUSE1/4 AMP - 100/115 VAC1/8 AMP - 200/230 VAC

SN

T2

L1

S1

D13R58

PD1

RCVR

J1J2

COM

R18 C9

P2

EPROMPV5

P12V

J6P5V

J5

HS1

R

D

PL-365 10 – 2

OR

ST-25 SERIES TRANSDUCER OUTLINE AND WIRING

radiatingsurface

120 mm(4.7")

84 mm(3.3") dia.

STANDARD ST-25B TRANSDUCER

1" NPT

cable

cable

radiatingsurface

STANDARD ST-25C TRANSDUCER

86 mm(3.4") dia.

135 mm(5.3")

1" NPT

1" NPT

ST-25B 120 mm (4.7")or

ST-25C 135 mm (5.3")

Dia. Aradiatingsurface

cable

bolt hole

25 mm(1")

factory bondedassembly

Dia. B

FLANGED MOUNTED ST-25 SERIES TRANSDUCER

TB1SHLD

HOT

2

HLD

1

OT

SHTB1 21

direct connection

connection via customer junction box

MicroRanger IIboard B

Notes: - Do not route cable openly in raceways.

- Cable length: - standard: - 1m ( 3’ )- optional: - consult Milltronics

- Radiating surface: - standard: - polyurethane- optional: - polyethylene, for dusty, non-corrosive non-condensing applications

- telfon ( flanged ), for highly corrosive applications- CPVC, for corrosive applications

- Cable must be run in a grounded metal conduit with no other cabling (except temp. sensor cable). Ground shield only at MicroRanger II. Insulate shield at junctions to prevent inadvertent grounding.

- Transducer wiring must be done in conjuction with approved conduit, boxes and fittings and to procedures in accordance with all governing regulations.

Dimensions are to North American standards.Optional dimensions to European and Asian standardsalso available.

Flange Size Dia. A Dia. B Holes Holes (dia.)

inch mm inch mm inch mm inch

3 152 6.0 191 7.5 4 19 0.75

4 191 7.5 229 9 8 19 3/4

6 241 9.5 279 11 8 22 7/8

8 299 11.75 343 13.5 8 22 7/8

12 432 17 483 19 12 22 7/8

FIG. 3PL-365 10 - 3

TEMPERATURE SENSORS OUTLINE AND WIRING

305 mm( 12 " )

3/4 " NPT

21 mm( 0.8 " )

dia.

227 mm( 9 " )

13 mm( 0.5 " )

dia.

3/4 " NPT

1/4 " NPT60 mm( 2.3 " )

41 mm( 1.7 " )

dia.

1" NPT

TS-2CPVC plastic

LTS-1 LTS-1C

1/2 " NPT

CSAFM, BASEEFA

304 Stainless Steel

NOTES :

1. The temperature sensor should be mounted in a location which represents the temperature fluctuationslikely to occur between the transducer and the target. To avoid false readings, mount the sensor out of direct sunlight. Radiant heating can cause a significant differential between air and sensor temperatures.

2. Temperature sensor cable can be run with transducer cable in a grounded metal conduit. Ground shield only at MicroRanger II. Insulate shield at junctions to prevent inadvertent grounding.

3. Temperature sensor wiring must be done in conjunction with approved conduit, boxes and fittings and to procedures in accordance with all governing regulations.

4. Cable lengths : - standard : 1 m ( 3’)- optional : consult Milltronics

FIG. 4

SHLD

WHT

BLK BLK

WHT

SHLD

BLK

SHLD

6 7 8

TB1

WHTsensor cable

toMicroRanger II(Beldon 8760)

customer’s junction box

Temperature Sensor Wiring

PL-365 10 - 4

TRANSDUCER MOUNTING - LIQUID APPLICATIONS

Bracketflexible conduit

steel channel

* 1 " NPT PVCcoupling

transducerST-25 series

Plywood

* 1 " NPT PVCcoupling

Plywood mounting provides excellentisolation, but must be rigid enough toavoid flexing if subjected to loading.

Flexible conduit mounted transducer shouldnot be subjected to wind, vibration or jarring.

Flexible Conduit

Flange, gasket and hardware supplied bycustomer. Refer to standpipe application, section

** nylon bolt5/8 " - 11

** nylon nut

*** flat face flange only

* 1" NPT PVCcoupling

Customer flanged standpipe. If metal flange, must be welded topipe. Refer to standpipe application, for pipe length.

* 1" NPT PVCnipple

** neoprene gasket( min. 1/4 " thk. )

Blind Flange Flanged Transducer

* Items supplied with all ST-25 transducers.** Items supplied with flanged transducers.

GUIDELINES :

1. Do not mount transducer directly to metal. Use PVC coupling and nipple as provided.

2. Do not overtighten mounting. Hand tightening of nylon bolts and nuts or PVC coupling and nipple is sufficient.

3. In liquid applications, transducer mount ( flange, bracket, conduit or plywood ) must keep transducer perpendicular to liquid surface.

4. Transducer installation, whether in non-hazardous ( as shown ) or hazardous areas, must be done in conjunction with approved conduit, boxes and fittings and to procedures in accordance with all governing regulations.

5. Flanges must be flat face only. ***Do not use raised face or lap joint flanges.*** Inner standpipe surface and ends must be smooth and free of burrs, ridges or seems.

FIG. 5PL-365 10 - 5

FIG. 6

hand tightenonly!

TRANSDUCER MOUNTING - SOLIDS APPLICATIONS

0

0 330

300

270

240

210

180150

120

9060

30

conduit clamping screws ( 1/4" - 20 x 1/2" ),use 1/8" allen key to adjust

transducer direction 0° to 360°

sighting block binding screws

angle block binding screws

transducer angle 0° to 20°

mounting holes - 3 places 11 mm ( 7/16 " ) dia. on 157 mm( 6.2 " ) bolt centre dia.

angle block

sighting block

mounting block

3/4 " x 1 "reducing coupling

transducer

76 mm( 3 " )

178 mm( 7 " )

3/4 " NPT aluminum conduitx 300 mm ( 12 " ) long

customer mounting plate. Refer totransducer outline for dimension details

minimum 90 mm ( 3.5" ) dia. clearance for transducer aiming

3/4 " locknut

cast aluminum

In solids applications, the transducer should be mounted so that it is aimed toward the low leveldraw point. To facilitate this mounting, it is suggested that the optional Milltronics Easy Aimer Kitbe used.

PL-365 10 – 6

EASY AIMER KIT INSTALLATION

1. Assemble transducer to conduit via reducing coupling supplied and feedconduit through center hole of aiming fitting, secure assembly with the conduit clamping screws.

2. Install locknut onto top end of threaded conduit

3. Bolt down mounting block ( i.e. to access plate of bin ) in a location away fromfill points or structural members that may intersect the sound’s path toward the low level draw point.

4. Leaving the sighting block binding screws fastened, loosen the angle blockbinding screws. Rotate angle block until transducer is pointing at the desiredangle. Angle reference graduations on the sighting block are 3.3° apart; e.g. ifline at 0° on angle block is 2 graduations past the 0° on the sightingblock, then transducer is angled at 6.6° from vertical.

Re-fasten angle block binding screws.

5. Lossen the sighting block binding screws and rotate sighting block untiltransducer is pointing in the desired direction. Direction reference graduationson the mounting block are 30° apart.

Re-fasten sighting block binding screws.

NOTE : It may take several attemps at various angles/directions to obtainoptimum results. Refer to sections Installation\Transducers andTroubleshooting\General for guidelines in aiming the transducer.

FIG. 6APL-365 10 – 7

FIG. 7

TYPICAL VOLUME APPLICATION

3

12

tank manufacture’sfull level

"Alternate"

span: corresponds to tankmanufacture’s capacity specification

tank manufacturer’s empty level

Empty level for "alternate"location. Below this level, echowould reflect away from thetransducer

discharge

Maximum full level for fullcalibration. Above this levelerroneous readings willresult as level has enteredblanking zone. (shaded area)

"Preferred" "Bad"

1. In most tanks, the transducer should be centered as much as possible ( without interference from inlet ) for optimum reading range. Beam should not detect bin bottom. If this occurs, use range extension (P-25) to omit false echoes.

Refer to Specification \ Transducers for transducer beam angle.

2. Transducer face must be parallel to liquid surface. Echo will miss improperly leveled transducer.

3. When performing an empty or full calibration, tank must contain its normal vapour and be at its normal temperature.

PL-365 10 – 8

FIG. 8

TYPICAL SOLIDS APPLICATIONS

1

2

1

1

emptying profile

bin wall seams

optional aiming fitting

1. Transducer too close to materialinlet. Falling material will intersectsound beam and cause erroneousreadings or loss of echo.

1. Transducer angled to avoid seams in bin wall and aimed at discharge in order to read bin when empty.

2. Avoid intersecting bin wall seams,structural members and wall irregularities. Otherwise, refer toadvanced calibation.

1. On fluid like solids, aim transducerperpendicular to material surface.

minimal angle of repose

discharge

filling profile

PL-365 10 – 9

FIG. 8 A

TYPICAL SOLIDS APPLICATIONS ( cont’d )

LC

mounting plate or junction box

transducerconveyor belt

height adjustment

do not install transducer on tangent areaof belt as loading affects zero

install transducer over idler to minimize beltsagging between idlers caused by material loading

install transducer perpendicular to belt so thatecho is not reflected away from transducer

CONVEYORS

centering adjustment

mount transducer on conveyor centerline

PL-365 10 – 10

FIG. 8 B

TYPICAL SOLIDS APPLICATIONS (cont’d)

3 2 14

agitator

infeed

STORAGE BIN WITH AGITATOR

1

typical high leveltypical low level

drag conveyor

infeed

DRYER - WOOD CHIPS

1. Transducer should be kept away from infeed2. Where agitators are in use, set P-47 = 13. Transducer should be aimed away from wall projections4. Transducer should not be in line with agitator blades where possible and away from agitator shaft.

1. Transducer should be mounted prependicular to slope of wood chips

PL-365 10 – 11

WIRING FORMATS

Basic Wiring

Optional Temperature Sensor(additional to basic wiring)

to transducer referto FIG. 3

select voltage via J7

For 100/115/200/230 VAC operation

to temperature sensor (cable may be run in conduit with transducer cable)

Note : remove jumper acrossterminals 7 & 8

— — — wiring by customer FIG. 9

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

HOT

SHLD

N12V

SHLD

BLK

WHT

SYNC

L2N

GR

L1

RELAY 2 RELAY 1OUTPUTTRANS

mA TEMP POWER

+ -

TB1

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

HOT

SHLD

N12V

SHLD

BLK

WHT

SYNC

L2N

GR

L1

RELAY 2 RELAY 1OUTPUTTRANS mA TEMP POWER

+ -

TB1

14 15 16 17 18

+ -

to 12 V DC for 12 V optionor

to 24 V DC for 24 V option

Optional DC Power

PL-365 10 – 12

WIRING FORMATS (cont’d)

to customer’s equipmentmaximum loading 350 Ω

mA output wiring into floatinginput only, 750 Ω maximum.

Do not ground!mA Output - Floating

(additional to basic wiring)

mA Output - Grounded(additional to basic wiring)

FIG. 9A— — — wiring by customer

Note : TB1 - 5 is internally connected to hydroground TB1 - 18

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

HOT

SHLD

N12V

SHLD

BLK

WHT

SYNC

L2N

GR

L1

RELAY 2 RELAY 1OUTPUTTRANS mA TEMP POWER

+ -

TB1

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

HOT

SHLD

N12V

SHLD

BLK

WHT

SYNC

L2N

GR

L1

RELAY 2 RELAY 1OUTPUTTRANS mA TEMP POWER

+ -

TB1

PL-365 10 – 13

WIRING FORMATS (cont’d)

Synchronization(additional to basic wiring)

NOTES : - Refer to Installation \ Synchronization for synchronization requirements- In addition to the interconnection of the sync terminals, units must share a common ground- Maximum 8 units in synchronization

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18TB1

NL2 GRL1

ON

MOC

CN

CNYS

THW

KLB

DLHS

V21N

DLHS

TOH

RELAY 1RELAY 2TRANS TEMP POWEROUTPUTmA

-+

COM

NO

NC

NC

CN

ON

MOC

ON

COM N

L2 GRL1ON

MOC

CN

CNYS

THW

KLB

DLHS

V21N

DLHS

TOH

RELAY 1RELAY 2TRANS TEMP POWEROUTPUTmA

-+

+ -

mAOUTPUT POWERTEMPTRANS RELAY 2 RELAY 1

HOT

SHLD

N12V

SHLD

BLK

WHT

SYNC

NC

COM

NO

L1 GRL2N

TB1

TB1 181716151413121110987654321

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

MicroRanger II #2

MicroRanger II #1

last MicroRanger II

FIG. 9B

PL-365 10 – 14

PL-365

Fig. 10, Schematic, not available in this format. Refer to paper copy of manual.