Campbell Scientific CNR1 Net Radiometer - Manual (Page 14)

CNR1 Net Radiometer
The four radiation outputs can be measured using Differential or Single-Ended
inputs on the datalogger. A differential voltage measurement (Instruction 2) is
recommended because it has better noise rejection than a single-ended
measurement. When differential inputs are used, jumper the low side of the
input to AG or
to keep the signal in common mode range.
TABLE 5-1. Datalogger Connections for Differential Measurement, When Using a 4WPB100
Function Color CR10X
CR800, CR850,
CR1000 21X/CR7, CR23X
CM3 Up Signal Red Differential Input (H) Differential Input (H) Differential Input (H)
CM3 Up Reference *Blue Differential Input (L) Differential Input (L) Differential Input (L)
CM3 Down Signal White Differential Input (H) Differential Input (H) Differential Input (H)
CM3 Down Reference *Black Differential Input (L) Differential Input (L) Differential Input (L)
CG3 Up Signal Grey or
†Orange
Differential Input (H) Differential Input (H) Differential Input (H)
CG3 Up Reference *Yellow Differential Input (L) Differential Input (L) Differential Input (L)
CG3 Down Signal Brown Differential Input (H) Differential Input (H) Differential Input (H)
CG3 Down Reference *Green Differential Input (L) Differential Input (L) Differential Input (L)
Shield Shield G
*Jumper to AG or with user supplied wire.
†Cables extended > 48’ have an orange wire.
Pt-100 Temperature Sensor Connections to 4WPB100 and Datalogger
Function Color 4WPB100 Datalogger
Black Wire Excitation
H Differential Input (H)
Pt-100 Excitation + Red L Differential Input (L)
Pt-100 Excitation - Blue G (AG CR10X/CR510)
Pt-100 Signal + Yellow Differential Input (H)
Pt-100 Signal – Green Differential Input (L)
TABLE 5-2. Datalogger Connections for Single-Ended Measurement, When Using a 4WPB100
Function Color CR10X CR23X, 21X, CR7
CR800, CR850,
CR1000
CM3 Up Signal Red Single-Ended Input Single-Ended Input Single-Ended Input
CM3 Up Reference Blue AG
CM3 Down Signal White Single-Ended Input Single-Ended Input Single-Ended Input
CM3 Down Reference Black AG
CG3 Up Signal Grey or Orange Single-Ended Input Single-Ended Input Single-Ended Input
CG3 Up Reference Yellow AG
CG3 Down Signal Brown Single-Ended Input Single-Ended Input Single-Ended Input
CG3 Down Reference Green AG
Shield Shield G
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