Campbell Scientific CNR4 Net Radiometer - Manual (Page 16)

CNR4 Net Radiometer
and is resistant to a variety of pollutants and UV-radiation. The mounting rod
can be unscrewed for transport.
An optional ventilation unit with a heater, CNF4, is designed as an extension of
the solar shield and can be fitted to the CNR4 or retrofitted later. The
heater/ventilation unit is compact and provides efficient air-flow over the
domes and windows to minimize the formation of dew and to reduce the
frequency of cleaning. The integrated heater can be used to melt frost.
The CNR4 design is such that both the upward facing and the downward-
facing instruments measure the energy that is received from the whole
hemisphere (180° field of view). The output is expressed in W/m
2 . The total
spectral range that is measured is roughly from 0.3 to 42 μm. This spectral
range covers both the short-wave solar radiation, 0.3 to 2.8 μm, and the long-
wave far infrared radiation, 4.5 to 42 μm. The gap between these two produces
negligible errors.
The CNR4 is manufactured by Kipp & Zonen, but cabled for use with
Campbell Scientific dataloggers. Its cables can terminate in:
• Pigtails that connect directly to a Campbell Scientific datalogger
(cable termination option –PT).
• Connector that attaches to a prewired enclosure (cable termination
option –PW).
6. Specifications
Features:
• Research-grade performance
• Meniscus dome on upper long-wave detector allows water droplets to
easily roll off of it and increases field of view to nearly 180°
• Internal temperature sensors provide temperature compensation of
measurements
• Drying cartridge helps keep the electronics dry
• Compatible with the CNF4 ventilation unit with heater that reduces
formation of dew and melts frost
• Separate outputs of short-wave and long-wave infrared radiation for
better accuracy and more thorough quality assurance
• Solar shield reduces thermal effects on the sensors
Compatible Dataloggers: CR1000
CR3000
CR5000
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