2 pyranometer specifications, 3 pyrgeometer specifications, Installation – Campbell Scientific CNR2 Radiometer User Manual

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CNR2 Net Radiometer

FIGURE 2-1. The Dimensions of the CNR2

2.2 Pyranometer Specifications

Spectral range:

310 to 2800 nm

Zero offset: Type A; 200 W/m

FIR

<15 W/m

Field of view for upper detector:

180

Field of view for lower detector:

150

Directional error:

<20 W m

-2

Non-linearity (0-1000 W m

-2

) net

irradiance:

<2.0%

2.3 Pyrgeometer Specifications

Spectral range:

4.5 to 42 µm

Field of view of upper detector:

150

Field of view of lower detector:

150

Non-linearity (-250 to +250 W m

-2

)

net irradiance:

<1%

3. Installation

For measurement of the net radiation, it is important that the instrument is
located in a place that is representative of the entire study region.

Install the CNR2 such that no shadow is cast on the net radiometer at any time
during the day. In the Northern Hemisphere, mount the CNR2 south of the
mast. In the Southern Hemisphere, mount the CNR2 north of the mast (see
Figure 3-1).