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| DR20 and DR15 일사계 | |
|---|---|
| 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 |