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# SPM 1
Measurement range | 0 … 2000 W/m² or 0 … 634 BTU/(ft² x h) |
Resolution | 0.1 W/m² or 0.1 BTU/(ft² x h) |
Accuracy | ±10 W/m² or ±3 BTU/(ft² x h) or ±5%; whichever is greatest in sunlight Additional temperature induced error ±0.38W/m²/C or ±0.12 BTU/(ft² x h)/ºC from 25ºC / 77ºF |
Angular accuracy | Cosine corrected < 5% for angles < 60º |
Drift | <± 2% per year |
Sampling rate | 4 times per second |
Detector | 1 x silicon photovoltaic sensor |
Internal memory | Auto data memory capacity: 43,000 sets Manual data memory capacity: 99 sets |
Operating conditions | 0 … 50ºC / 32 … 122ºF; < 80% RH |
Power supply | 4 x AAA Li-ion batteries (approx. 16 days of continuous use at full charge) |
Dimensions | 111 x 64 x 34 mm or 4.37 x 2.52 x 1.34 in |
Weight | 158 g / < 1 lb |
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*Demonstrations can only be scheduled within the UAE