Campbell CVF4 Spécifications télécharger pdf (Page 10)

CNR4 Net Radiometer

2.2 Pyranometer Specifications

* indicates ISO specifications.

Spectral range:

305 to 2800 nm (50% points)

Sensitivity:

10 to 20 µV/W/m

2

Response time*:

< 18 seconds (95% response)

Non-linearity*:

< 1% (0-1000 W m

-2

irradiance)

Non-stability*:

< 1%

Temperature dependence of

sensitivity*:

< 4% (-10° to +40°C)

Tilt response*:

< 1% at any angle with 1000 W/m

2

Directional error*:

< 20 W/m

2

at angle up to 80° with

1000 W/m

2

Zero offset due to 0 to -200 W/m

2

IR net irradiance*:

< 15 W/m

2

Zero offset due to temperature

change*:

< 3 W/m

2

(5K/hr temperature change)

< 1 W/m

2

(with CVF 4 installed)

Operating temperature:

-40°C to +80°C

Field of view

Upper detector:

Lower detector:

180°

150° (due to lower solar shield to

prevent illumination at low zenith

angles)

Maximum solar irradiance:

2000 W/m

2

Expected accuracy for daily totals:

±10 %

Typical signal output for

atmospheric application:

0 to 15 mV

Impedance:

20 to 200 Ω, typically 50Ω

Detector:

Copper-constantan multi junction

thermopile

Level accuracy:

1 degree

Irradiance:

0 to 2000 W/m

2

Spectral selectivity:

< 3% (330-1500 nm spectral interval)

Uncertainty in daily total:

< 5% (95% confidence level)

Instrument calibration:

Indoors. Side by side against reference

CMP3 pyranometer according to ISO

9847:1992 annex A.3.1

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