1、 Overview

Duwei DW151 differential pressure transmitter is a special product for air conditioning unit. It adopts intelligent embedded software algorithm and unique temperature compensation technology developed by Dewey to solve the problems of zero drift, frequent pressure variation and nonlinear output of air pressure measurement of air conditioning unit.

2、 Product characteristics

Solid aluminum alloy housing

Meet the requirements of clean industry

Led glow display, intuitive reading, clear

Resolution 0.1pA, digital compensation, good stability

High precision: 1% FS (general)

Auto Zero: zero can be calibrated automatically

3、 Technical parameters

Accuracy (F.S): ± 1% FS accuracy includes linearity, hysteresis and repeatability

Stability: < 0.5% FS / year

Response time: 250ms

Temperature range: storage temperature: 40-85 ℃ working temperature: - 15-70 ℃

Temperature drift: ± 0.03% FS / year

Installation location influence: ± 1% / g

Output signal: two lines 4-20mA

Power supply: 24VDC

Wiring protection: reverse wiring protection

Pressure interface: 1/8 "tower joint

Shell: cast aluminum shell, dark grey coating, resistant to 168 hour salt spray test

Measuring medium: clean, dry, non corrosive gas

Maximum overpressure: range fs*10

Protection grade: IP65

4、 Overall dimensions

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5、 Installation method

Surface installation: drill 3 equal distance holes with the same size and equal distance on the circumference with diameter of Φ 4-1/16 M2 (103mm), and connect them with the 3 holes on the back of the table, and fix them with 6-32 # screws of appropriate length.

Embedded installation: select a flat plate with diameter of Φ 4-31 / 64 M2 (114mm) with opening diameter, insert differential pressure gauge into the flat plate, and fix the meter in proper position with 6 screws provided in the accessory package.

Note: differential pressure transmitter must be installed vertically when using it!

6、 Electrical connection

If no output is required, connect the positive pole of 24V DC constant voltage power supply to the instrument terminal "+" and the negative pole of DC constant voltage power supply to the instrument terminal "-".

The wiring method for the output change is as follows:

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Note: when wiring, the power supply must be disconnected!

7、 Selection list

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For example: product code dw151-1-m, which is represented as DW151, range 0-60pa-10kpa, side installation.

• 杜威DW151差压变送器选型说明书.pdf