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For temp cable, 3. labels on the pigtail end of the solar cable – Campbell Scientific CNR4 Net Radiometer User Manual

Page 27

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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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