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DR20 and DR15 일사계 | |
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ISO classfication | spectrally flat pyrheliometer DR20: Class A DR15: Class B |
Response time (95%) | 4 s (nominal) |
Full field of view angle | 5 ° |
Slope angle | 1 ° |
Calibration uncertainty | < 1.2% (K = 2) |
Measurement range | 0 to 4000 W/m2 |
Spectral range | 200 to 4000 nm |
Analogue output | millivolt |
Rated operating temperature range | -40 to +80 °C |
Temperature response | DR20: < ± 0.5 % (-10 to +40 °C), with correction in data processing: < ± 0.4 % (-30 to +50 °C) DR15: < ± 1 % (-10 to +40 °C) |
Calibration certificate | included |
Temperature response test of individual instrument | DR20 : report included DR15 : no report |
Heater | 1 W at 12 VDC |
Standard cable length | 5 m |