Apogee SP-214 Manuale d'uso - Pagina 6

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SPECIFICATIONS

Heater

Sensitivity

Calibration Factor

(Reciprocal of Sensitivity)

Calibration Uncertainty

Calibrated Output Range

Measurement Repeatability

Long-term Drift

(Non-stability)

Non-linearity

Response Time

Field of View

Spectral Range

Directional (Cosine) Response

Temperature Response

Operating Environment

Dimensions

Mass

Cable

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.

SP-110

N/A

± 5 % (see Calibration Traceability below)

Less than 2 % per year

Less than 1 % (up to 2000 W m

360 to 1120 nm (wavelengths where response is 10% of maximum;

see Spectral Response below)

± 5 % at 75º zenith angle (see Cosine Response below)

0.04 ± 0.04 % per C (see Temperature Response below)

-40 to 70 C; 0 to 100 % relative humidity; can be submerged in water up to depths

24 mm diameter; 27.5 mm height

90 g (with 5m of lead wire)

5 m of two conductor, shielded, twisted-pair wire; additional cable available in

multiples of 5 m; santoprene rubber jacket (high water resistance, high UV

stability, flexibility in cold conditions); pigtail lead wires

SP-230

780 Ω,15.4 mA current drain and 185

mW power requirement at 12V DC

-2

0.2 mV per W m

5.0 W m

-2

per mV

0 to 400 mV

Less than 1 %

-2

)

Less than 1 ms

180º

of 30 m