Apogee Instruments SP-212 Manuale d'uso - Pagina 7

Sfoglia online o scarica il pdf Manuale d'uso per Strumenti di misura Apogee Instruments SP-212. Apogee Instruments SP-212 20. Pyranometer

Calibration Traceability

Apogee Instruments SP series pyranometers are calibrated through side-by-side comparison to the mean of four

Apogee model SP-110 transfer standard pyranometers (shortwave radiation reference) under high intensity

discharge metal halide lamps. The transfer standard pyranometers are calibrated through side-by-side comparison

to the mean of at least two ISO-classified reference pyranometers under sunlight (clear sky conditions) in Logan,

Utah. Each of four ISO-classified reference pyranometers are recalibrated on an alternating year schedule (two

instruments each year) at the National Renewable Energy Laboratory (NREL) in Golden, Colorado. NREL reference

standards are calibrated to the World Radiometric Reference (WRR) in Davos, Switzerland.