Campbell CNR4 Manual de instrucciones descargar pdf (Pagina 29)

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 B.4, 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.

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

NOTE

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Campbell CNR4 Manual de instrucciones Pagina 29