Wiring, 1 sdi-12, Sdi-12 – Campbell Scientific CS450/CS455 Pressure Transducer User Manual
Page 21: 1. sdi-12
CS450/CS455 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 CS450 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.
5. Wiring
5.1 SDI-12
It is recommended to power down your system before wiring the
CS450/CS455. The shield wire plays an important role in noise emissions and
susceptibility as well as transient protection.
TABLE 5-1. SDI-12 Wiring
Color
CS450/CS455
Function
CR800
CR5000
CR3000
CR1000
CR200
Series
CR510
CR23X
CR10X
Red +12VDC 12V
Battery+ 12V
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
15
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