Campbell Scientific CNR4 Net Radiometer - Manual (Page 27)

CNR4 Net Radiometer
FIGURE 7-2. The marks on the end of the CNR4: S for SOLAR cable,
and T for TEMP cable
The measurement details for Pt-100 sensor, including the wiring diagram and
sample program, are explained in Appendix C, CR3000 Program for
Measuring Pt-100 Temperature Sensor.
The four radiation outputs can be measured using differential or single-ended
inputs on the datalogger. A differential voltage measurement 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.
NOTE
TABLE 7-3 and TABLE 7-4 show the wiring instructions for the differential
measurement and single-ended measurement connections to the datalogger,
respectively. The cables have the white band at the pigtail end of the cable
with the color keys. See FIGURE 7-3 and FIGURE 7-4 below for the labels on
the cable for both the SOLAR and TEMP cables.
FIGURE 7-3. Labels on the pigtail end of the SOLAR cable
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