Campbell Scientific CNR2 Radiometer - Manual (Page 11)

CNR2 Net Radiometer
TABLE 5-2. Edlog Datalogger Connections for Differential Measurement
Heat Shrink Label Color CR10X, CR510 CR23X 21X/CR7
Pyranometer Sig White Differential Input (H) Differential Input (H) Differential Input (H)
Pyranometer Ref Blue Differential Input (L) Differential Input (L) Differential Input (L)
Pyrgeometer Sig Brown Differential Input (H) Differential Input (H) Differential Input (H)
Pyrgeometer Ref Black Differential Input (L) Differential Input (L) Differential Input (L)
Shield Clear G
If the CNR2 Net Radiometer was purchased from Kipp and Zonen, the color of
the connection cable is yellow and have the pin out shown in Figure 5-2.
FIGURE 5-2. Pin Layout on Kipp & Zonen Original Cable
TABLE 5-3. Campbell Scientific Cable vs. Kipp & Zonen Cable
Campbell Scientific Cable Kipp & Zonen Cable
White Red
Blue Blue
Brown Green
Black Yellow
Clear Clear
6. Datalogger Programming
The CNR2 outputs two voltages that typically range from 0 to 15 mV for the
pyranometers, and
±5 mV for the pyrgeometers. Use a differential voltage
measurement because it has better noise rejection than a single-ended
measurement. If differential channels are not available, single-ended
measurements can be used. The acceptability of a single-ended measurement
7