Campbell Scientific SP-LITE Solar Radiation Sensor - Manual (Page 11)

SP-LITE Silicon Pyranometer
7
4. Wiring
The SP-LITE can be measured with a differential or single-ended channel on
the datalogger; a differential channel is recommended.
FIGURE 8. SP-LITE to Datalogger Connections
TABLE 1. Datalogger Connections for Differential Measurement
Function Color CR10X,CR510 CR23X 21X/CR7 CR1000
Radiation Signal White Differential H Differential H Differential H Differential H
Signal Reference Green Differential L Differential L Differential L Differential L
Jumper to AG
Shield Clear G
TABLE 2. Datalogger Connections for Single-Ended Measurement
Function Color CR10X,CR510 CR23X 21X/CR7 CR1000
Radiation Signal White S.E. Channel S.E. Channel S.E. Channel S.E. Channel
Signal Reference Green AG
Shield Clear G
5. Datalogger Programming
The SP-LITE outputs a low-level voltage ranging from 0 to a maximum of
about 15mV. A differential voltage measurement (Instruction 2, VoltDiff) is
recommended because it has better noise rejection than a single-ended
measurement. If a differential channel is not available, a single-ended
measurement (Instruction 1, VoltSE) can be used. The acceptability of a single-
ended measurement can be determined by simply comparing the results of
single-ended and differential measurements made under the same conditions.
Radiation Signal White
Signal Reference Green
Shield Clear
(User supplied jumper wire for differential measurement only)