Campbell Scientific CS431 Submersible Pressure Transducer - Manual (Page 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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