Campbell Scientific CS451/CS456 Pressure Transducer - Manual (Page 21)

CS451/CS456 Submersible Pressure Transducer
For example, if the correct elevation of the water, as measured by a staff gauge
or other measurement device, is 2015.50 feet, and the CS451 provides a
reading of 5.76 psig, then:
5.76 psig • 2.31 ft/psig = 13.3056 ft.
So, the offset is calculated:
2015.50 ft – 13.3056 ft = 2002.1944 ft
This offset can be accounted for in the program instruction of the SDI-12
recorder.
7.3 Wiring
Power down your system before wiring the CS451/CS456. The
shield wire plays an important role in noise emissions and
susceptibility as well as transient protection.
7.3.1 SDI-12 Datalogger Connections
TABLE 7-1. SDI-12 Wiring
Color
CS451/CS456
Function
CR800
CR5000
CR3000
CR1000
CR200(X)
Series
CR510
CR23X
CR10X
Red +12 Vdc 12 V Battery+ 12 V
Black Power Ground G G G
White SDI-12 Signal *Control Port C1/SDI-12 Control Port
Blue GND GND G G
Yellow GND GND G G
Clear Shield GND G G
*dedicated SDI-12 port on CR5000
7.3.2 RS-232 Connections
TABLE 7-2. RS-232 Wiring
Color
CS451/CS456
Function Connection RS-232 9-pin
Red +12vdc Power Source
Black Power Ground Power Ground
White RS-232 Tx (Output) Transmit Pin 2 Rx (Input)
Blue RS-232 Rx (Input) Receive Pin 3 Tx (Output)
Yellow Digital Ground Ground Pin 5 GND
Clear Shield GND Ground
NOTE
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