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CNR1 Net Radiometer

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,CR510 CR23X 21X/CR7

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

TABLE 5-3. CR3000 and CR5000 Connections

for Differential Measurement

Function Color CR3000/CR5000

CM3 Up Signal Red Differential Input (H)

CM3 Up Reference Blue Differential Input (L)

CM3 Down Signal White Differential Input (H)

CM3 Down Reference Black Differential Input (L)

CG3 Up Signal Grey or Orange Differential Input (H)

CG3 Up Reference Yellow Differential Input (L)

CG3 Down Signal Brown Differential Input (H)

CG3 Down Reference Green Differential Input (L)

PT-100 Signal + Yellow Differential Input (H)

PT-100 Signal - Green Differential Input (L)

PT-100 Current Excitation + Red Current Excitation IX

PT-100 Current Excitation - Blue Current Excitation IXR

Shield Clear

6. Datalogger Programming

The CNR1 outputs four voltages that typically range from 0 to 15 mV for the

CM3 sensors, and ± 5 mV for the CG3 sensors. A differential voltage

measurement (Instruction 2) is recommended because it has better noise

rejection than a single-ended measurement. If differential channels are not

available, single-ended measurements (Instruction 1) can be used. The

acceptability of a single-ended measurement can be determined by simply

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