Instruction Manual

NR01 Four-Component Net Radiation Sensor
3.2 SR01 Pyranometer Specifications
TABLE 3.2-1. Specifications of SR01
SR01 ISO / WMO Specifications
Overall classification
according to ISO 9060 /
WMO
Second class pyranometer
Response time for 95 %
response
18 s
Zero offset a (response to
200 W/m
2
net thermal
radiation)
< 15 W/m
2
Zero offset b (response to 5
k/h change in ambient
temperature)
<4 W/m
2
Non-stability < 1% change per year
Non-Linearity < +/- 2.5%
Directional response for
beam radiation:
Within +/- 25 W/m
2
Spectral selectivity +/- 5% (305 to 2000 nm)
Temperature response
(within an interval of 50
degrees C)
Within 6% (-10 to +40 degrees C)
Tilt response Within +/- 2%
SR01 Additional Measurement Specifications
Sensitivity 10-40 μV/Wm
-2
Expected voltage output Application with natural solar radiation: 0.1 to +
50 mV
Sensor resistance Between 40 and 60 Ohms (without trimming)
Power required Zero (passive sensor)
Range To 2000 Wm
-2
Spectral range 305 to 2800 nm (50% transmission points)
Required programming Φ = U / E
Expected accuracy for daily
sums
+/- 10%
Calibration
Calibration traceability To WRR, procedure according to ISO 9847
12