Campbell Scientific CNR1 Net Radiometer - Manual (Page 7)

CNR1 Net Radiometer
Tilt response: Max. dev. 2%
Overall ISO classification: second class
Sensitivity: 10 - 35 µV/(W m -2 )
Impedance: 125 Ohm nominal
Operating temperature: -40°C to +80°C
Spectral range: 305-2800 nm (50% points)
Expected signal range for
atmospheric application:
0 - 15 mV typical
Expected accuracy for daily sums: ± 10%
Window heating offset: Max. 25 W m -2 at 1000 W m -2 normal
incidence solar radiation
2.3 CG3 Specifications
Response time 95%: 18 s
Non-stability: < 1% change per year
Non-linearity: Max. dev. 2.5% (0-1000 W m -2 )
Temperature dependence of
sensitivity:
6% (-10°C to +40°C)
Tilt response: Max. 3% when facing downwards
Field of view: 150 degrees
Sensitivity: 5 - 35 µV/(W m -2 )
Impedance: 125 Ohm nominal
Operating temperature: -40°C to +80°C
Temperature range for specified
behavior:
-10°C to +40°C
Measurement range: -250 to +250 W m -2
Spectral range: 5 to 50 µm
Expected signal range for
atmospheric application:
-4 to 4 mV
Expected accuracy for daily sums: ± 10%
3. Installation
For measurement of the Net Radiation, it is most important that the instrument
is located in a place that is representative of the entire region that one wishes to
study.
When installed on a mast, the preferred orientation should be such that no
shadow is cast on the Net Radiometer at any time during the day. In the
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