Tel : 031-427-8005 E-mail : info @ taehung.co.kr

Features

Ordering Information

AIRTRON

Process Type : FT = Airflow Measurement

PT = Pressure Measurement

Option : MO = RS485 Modbus RTU

AL = Alarm Output (SPDT)

AIRTRON is microprocessor based airflow & pressure

transmitter which measure air velocity with pitot tubes,

and duct static or differential pressure in HVAC control

system applications.

The AIRTRON consist of temperature compensated

low differential pressure sensing module, auto - zeroing

valve & circuit and state of the art digital electronics

in the transmitter which has industry standard output

signal for remote monitoring and control.

Airflow & PressureSmart Transmitter

AIRTRON

▶ R&D center, Hospital

▶ Industrial buildings

▶ Pharmaceutical, etc

▶ AHU fan flow measurement

▶ Duct airflow measurement

▶ Air pressure measurement

Typical Applications

▶ Multi - points linearization

▶ Malfunction diagnostic capability

▶ Auto zeroing capability

Rugged and Reliable

▶ 0 - 6 to 0 - 50 m/s flow range

▶ 0.5% of Accuracy

▶ No position effected

Ultra-low Diff. Pressure Sensor

▶ Simple configuration menus

▶ Long - term stability

▶ No maintenance required

Low Cost of Ownership

▶ Microprocessor based functionality

▶ 4 - 20 mA or 0 -10 Vdc, RS485 Modbus.

▶ Air volume and velocity display

Flexible Functionality

73, Simin - daero, Dongan - gu, Anyang, GY., South KoreaTel : 031 - 427 - 8005 Fax : 031- 427 - 8020E-mail : info @ taehung.co.kr Website : www.taehung.co.kr

Agent :

Airflow & Pressure Transmitter

Technical Specifications

Performance

▶ Diff. Pressure Span : 0 - 2.5 to 0 - 200 mmH2O (± 1.25 to ± 125 mmH2O)

▶ Accuracy : 0.5% of full scale

▶ Temperature Effect : ■ Zero : None-corrected by Auto-zeroing ■ Span : 0.025% of span/℉

▶ Temperature Limits : ■ Operating : -10 to 60℃ ■ Storage : -40 to 80℃

▶ Overpressure Limits : 5 psi

▶ Humidity Limits : 0 to 95% RH, non-condensing

▶ Span Adjustments : Performed by internally mounted push buttons

▶ Zero adjustments : Performed by internally mounted auto-zeroing circuit & valve selectable 1 - 24 hours on 1 hour intervals

▶ Display & Output Low Pass Filter : A step change is adjustable in 8 increments

▶ Malfunction Diagnostics : Self-malfunction diagnostics display

Indication

▶ LCD Display with backlit, selectable engineering units such as m3/h, m3/m, ft3/m, m/s, mmWC, inWC, Pa.

Outputs

▶ Analog Output 4 - 20 mADC, 0 -10 VDC or RS485 Modbus▶ Alarm Outputs : 2 × SPDT Relay contact 1A @ 24VDC

Power

▶ Power Supply : 24 VAC/DC, ±10 %▶ Power Consumption : ■ 2.3 VA at 24 VAC ■ 2.5 VA at 24 VDC

Enclosure

▶ Process Connections : 2 × 1/4”Barbed fittings▶ Material : Painted steel or Stainless steel

Dimension Wiring

102

126

155

49

FRONT

BOTTOM

RS485 Modbus

3 or 4 WIRE (Analog Output)

<FIELD>

<AIRTRON>Internally

Connected

DP/FLOWANALOGSIG IN

24VAC/DCPOWER

PLC / DDC

＋ － ＋ －

RS48524VAC/DCPOWER

PLC / DDC

＋ － A B

CN3

SIG COM

ANALOGOUT

POWER

＋24 COM

CN3

A B

RS485POWER

＋24 COM

COM NO COM NO

ALARM2

ALARM1

EXTERNALSWITCH

－ ＋

PLC / DDC

CN4 (Optional)

＋24 COM SIG COM

ALARMRELAYOUT 2

ALARMRELAYOUT 1

EXTERNALSWITCH

IN

＋24 COM

CN3

＋24 COM SIG COM

ALARMRELAYOUT 2

ALARMRELAYOUT 1

EXTERNALSWITCH

IN

＋24 COM

COM NO COM NO

ALARM2

ALARM1

EXTERNALSWITCH

－ ＋

PLC / DDC

<FIELD>

<AIRTRON>

Tel : 031-427-8005 E-mail : info @ taehung.co.kr

Operating Principal

Type FP airflow measuring probe consists of multiple sets

of fechheimer pitot total and static pressure sensing ports,

positioned along the length of the probe to traverse the duct

cross-section, average the sensed pressures in separate

internal manifolds, and provide a measurement of velocity

pressure accurate within 2% of actual flow when the quantity

of the probes and the location in the duct are in accordance

with our minimum installation requirements.

Type FP is available in externally mounted, insertable/removable

and Internally mounted versions to fit the needs of both new

installation and retrofit applications.

Airflow Measuring ProbeType FP

Duct Mounting & Dimensions

T.P. & S.P.Takeoffs

TP SP

传感器

Duct Wall

A = Duct I.D.

B = Probe Dia.

MOUNTING PLATE (mm)

102

102

Threaded End SupportGasket, Washer, and Nut

Mounting Platewith Gasket

102 × 102 200 - 1300

1301 - 2700

Mounting Plate

102 × 102

8

D

8

19

B

25

30

C

尺寸 (mm)

A

40 INSERTION HOLE END HOLE

C

D

Airflow

Type FP airflow measuring probe utilize self averaging, multi points

pitot technology which produces differential pressure from a total

and dual offset static pressure ports of air movement of duct or pipe.

Total pressure sensing ports (Pt) are located on the leading surface

of the probe which effects on dynamic pressure to induce total

pressure by velocity of airflow. Static pressure sensing ports (Ps)

are positioned at angles offset from the flow normal vector, minimize

the error including effect of turbulent airflow. i.e.One static sensor is

exposed to a higher pressure, the other static sensor exposed a

lower pressure of the same magnitude, this elimination of the undesired

effect of partial total pressure is assuring the accurate and stable

measurement without airflow straightener upstream.

Figure 1

TotalPressureSensor

StaticPressureSensors

Ps

Ps

Pt

Pt

Ps

TOTAL PRESSURESTATIC PRESSURE

TotalPressureAveragingManifold

Printed Oct. 2016

73, Simin - daero, Dongan - gu, Anyang, GY., South KoreaTel : 031 - 427 - 8005 Fax : 031- 427 - 8020E-mail : info @ taehung.co.kr Website : www.taehung.co.kr

Agent :

the location indicate the minimum clearance required from air tur-

bulence producing source to guarantee measuring performance

Airflow measurement is highly dependent upon the quantity and

pattern of sensing points of the duct crosssectional area in the

airstream, we recommend quantity of airflow senising depend on

within 2% accuracy. the airflow element should be installed

where greater distance of straight duct than shown below.

duct size in accordance with measurement standard (ASHRAE

fundamentals, AMCA publication 203, etc) shown below guide

line for the measurement accuracy within 1-2% of actual airflow.

Sensing Element InstallationMinimum Installation Requirements

Accuracy

Retangular Duct : X =H＋W

2(H×W)

Circular Duct : X = Duct Diameter

SWEEP ELBOW

ROUND SWEEPELBOW CENTRIFUGAL

FAN INLETVANE-AXIAL

FAN

TRANSITION ANGLE ≤ 15̊

90̊ UNVANED ELBOW

90̊ VANED ELBOW

TAKEOFFS

ELBOWS DAMPERS

DUCT TRANSITIONS

FANS

Height

Width

FOR SQUARE AND RECTANGULAR DUCT FOR CIRCULAR DUCT

Diameter

Up to 350

＞ 351 - 760

＞ 761 - 1400

＞ 1401 - 2100

＞ 2101 - 3100

＞ 3101 ＋

1

2

3

4

5

6

Height (mm)Height (mm) Recommend Qty. Recommend Qty.

＞ 200 - 450

＞ 451 - 1800

＞ 1801 ＋

1

2

3

Diameter (mm) Recommend Qty.