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Ventilation Unit - CVF4

Ventilation Unit - CVF4
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CVF4 Ventilation Unit To improve Accuracy and Reduce Maintenance of Radiometer Measurements Low power and low maintenance Can be used under all weather conditions Improves accuracy of radiometer data Reduces frequency of dome cleaning Improves stability of measurements Prevents dew Introduction Ventilation of radiometers improves the reliability and accuracy of the measurement by reducing dust, raindrops and dew on the dome, which would otherwise aﬀect the measurement. It stabilises the temperature of the radiometer near to that of the ambient air and suppresses the thermal oﬀsets which are produced by cooling down the domes under calm clear sky conditions or by dome heating due to absorption of solar radiation. CVF4 Ventilation Unit is a low maintenance ventilation unit The fan of the CVF4 runs continuously to reduce dust and with a fan and inlet filter that provides a flow of clean air dirt settling, to dissipate rain drops and to stabilise the over the dome of a radiometer. The integrated heater allows dome temperature. The tacho output from the fan gives two the air to be warmed when necessary. pulses per revolution and allows remote monitoring of the fan operation using a data logger. The flow that the CVF4 creates is unique. At the top of the pyranometer dome the flow is very high and it swirls to CVF4 features the waterproof connector and signature yellow improve the air distribution over the dome. The position of cable that are used in our other instruments. This makes the heaters and the cover material ensures that minimal installation and servicing easier. Cable lengths of 10, 25 heating power is needed to melt frost and snow compared to and 50 meters are available or it can be supplied with the older ventilation units. connector plug only, for the customer to fit their own cable

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Applications CVF4 is designed to operate under all weather conditions The instrument bubble level is visible through the ventilator and is easy to use. The only part that needs maintenance is air outlet in the cover, which is easily removed to check the the removable air inlet filter, which should be checked at radiometer desiccant. CVF4 is backwards compatible with regular intervals and cleaned or replaced when necessary. the older CM and CG series radiometers. A ventilation system does not prevent the radiometer dome CVF4 can be mounted on the 2AP and SOLYS 2 sun trackers becoming dirty,...

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