Campbell-scientific CS431 Submersible Pressure Transducer Manual de usuario descargar pdf (Pagina 8)

CS431 Submersible Pressure Transducer

FIGURE 4-2. Typical Temperature Element Wiring

4.2 Grounding

Proper grounding is very important!

CAUTION

To prevent grounding issues, do the following:

(1) Attach the sensor cable shield (the wrapped shield inside the cable) to the

power ground (G terminal) on the datalogger.

(2) Use a 12 AWG or larger wire to connect the datalogger’s grounding lug

with a grounding rod that has been driven into the earth.

(3) If using an external power supply, tie the power supply and datalogger to

the same earth ground

See also: Section 7.4 Grounding Issues.

5. Datalogger Programming

This section is for users who write their own datalogger

programs. A datalogger program to measure this sensor can be

created using SCWIN ShortCut. You do not need to read this

section to use ShortCut.

NOTE

The following is the program structure typically used to get a pressure

measurement:

• Apply 800 mV excitation across V+ (white) and AG (green).

• After a 25 millisecond delay, measure the reference voltage (Vr) across the

100 ohm resistor by measuring across Vr+ (blue) and Vr- (red). *

• Measure the output voltage (Vo) across Vo- (purple) and Vo+ (yellow).

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Campbell-scientific CS431 Submersible Pressure Transducer Manual de usuario Pagina 8