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Overview

The CNF4, manufactured by Kipp & Zonen, is a heater/ventilation unit that fits onto the CNR4 Net Radiometer. It provides efficient air-flow over the domes and windows, which minimizes the formation of dew and reduces the frequency of cleaning. The integrated heater melts the frost.

Note: Beginning in May of 2016, the CNF4 design was changed from a four-wire connection to an eight-wire connection. The electrical specifications for the heater, ventilator, and tachometer output are identical for the four-wire and eight-wire versions. The only difference between them is the connector layout. The eight-wire version has an added opto-coupler in the tachometer output, which minimizes the voltage drop over the ground line and maximizes the usable cable length. Depending on the datalogger that is used with the CNR4-L and the older, four-wire version of the CNF4-L, the tachometer output may not work for 25-m (82-ft) or 50-m (164-ft) cables. 

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Detailed Description

The CNF4 is a heater/ventilation unit that fits onto the CNR4 Net Radiometer. It provides efficient air-flow over the domes and windows, which minimizes the formation of dew and reduces the frequency of cleaning. The integrated heater melts the frost.

Specifications

Heater Power Consumption 10 W @ 12 Vdc (15 Ω)
Ventilator Power Consumption 5 W (@ 12 Vdc)
Ventilator Supply Voltage 8 to 13.5 Vdc
Operating Temperature Range -40° to +80°C
Length 16.8 cm (6.6 in.)
Height 4.7 cm (1.9 in.)
Weight 0.5 kg (1.1 lb) without cable

Compatibility

The CNF4 is used with the CNR4-L.


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