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CVF 4 Ventilation Unit
  • CVF 4 Ventilation Unit

CVF 4 Ventilation Unit

Quick Overview

The CVF4 Ventilation unit is a low maintenance ventilation unit with a fan and inlet filter that provides a flow of clean air over the dome of a radiometer. The integrated heater allows the air to be warmed when necessary. The fan of the CVF4 runs continuously to reduce dust and dirt settling, to dissipate rain drops and to stabilise the dome temperature. A tacho output from the fan gives two pulses per revolution and allows remote monitoring of the fan operation using a data logger. The CVF4 is designed to be used with Kipp & Zonen CMP and SMP series pyranometers, the CGR 4 pyrgeometer, and the CUV5 total UV radiometer.
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Details

Feature

  • Increase the interval between maintenance visits
  • Increase the accuracy of measure data
  • No precipitation or condensation on the sensor
  • Reduce the zero offset of the sensors
  • Frost, snow and ice can be melted
  • The World Meteorological Organisation (WMO) and the Baseline Surface Radiation Network (BSRN) guidelines advise using a ventilator to optimise the performance of radiometers in general.

The CVF 4 Ventilation unit can be used to improve the measurement accuracy of Kipp & Zonen pyranometers, pyrgeometers and radiometers. The ventilation unit generates a constant swirling air flow around the sensor to prevent dust and dirt from settling, to dissipate rain drops and to stabilise the dome temperature. The unit is also fitted with an integrated heater that can be used to keep the air just above ambient temperature.

The CVF4 is suitable for all CM, CMP, SMP, CG, CGR and CUV radiometers. However with the CMP3 and SMP3 and CGR3 the ventilation effect will be less due to the larger opening around the dome. The CVF4 is meant to run continuously but the heater can either be switched on permanently for cold regions or be switched by a data logger or clock to remove dew in the morning and be switched off afterwards. In that case the heater should be operated from about 2 hours before sunrise to an hour after sunrise. This saves power in situations where power is limited such as PV operated sites.

Specifications

Air temp rise caused by CVF4:
<0.25°C @ 0 Watt (ventilator only)
<1°C @ 5.5 Watt (Heater)
Tacho Output:
5V, 2 pulses per revolution
8800 pulses per minute (nominal)
Power Supply: 12vDC @ 0.9A (with heater)
Power Consumption: 5W, 5.5W with heating
Operational Temp Range: -40 to +70°C
Humidity Range: 0 to 100% non condensing
IP Rating: IP54

 

Availability: Stock Item

 

Components / Downloads

For further information, technical advice, or a quotation please call or email us. If you are not sure which product you need one of our technical sales advisors will be happy to discuss your application. We also accept company purchase orders by fax or post. Credit card orders can also be placed over the phone for any product.

REF DESCRIPTION DOWNLOADS PRICE ORDER ITEM
 
CVF 4 Ventilation Unit
0378900-000
0378900-000
CVF 4 Ventilation unit designed to provide clean air-flow over the dome or window to minimise the formation of dew and reduce the frequency of dome cleaning. Replaceable fan inlet filter. Power Supply 8-13.5vDC (5W continuously at 12vDC, 5.5W with heater) Operating temperature range -40 to +70°C. Waterproof connector, supplied without plug or cable. Suitable for Kipp & Zonen CMP & SMP series pyranometers and CUV5 & UVS radiometers.
£909.00
or call us for a quote
0378900-002
0378900-002
CVF 4 Ventilation unit designed to provide clean air-flow over the dome or window to minimise the formation of dew and reduce the frequency of dome cleaning. Replaceable fan inlet filter. Power Supply 8-13.5vDC (5W continuously at 12vDC, 5.5W with heater) Operating temperature range -40 to +70°C. Supplied with waterproof 4-pin plug connector with 10m of pre-wired yellow signal cable. Suitable for Kipp & Zonen CMP & SMP series pyranometers and CUV5 & UVS radiometers.
£993.00
or call us for a quote
 
Connection Options for CMP Pyranometers, CGR3 (10K), CGR4 (10K), CVF4 & CNF4 Ventiliation units.
2523145
Waterproof 4-pin plug connector for the following Kipp & Zonen equipment. CMP Series pyranometers, CGR3 & CGR4 pyrgeometers and CVF4 & CNF4 ventilation units. Requires customers own cable wiring.
£20.00
or call us for a quote
0362611
Waterproof 4-pin plug connector with 10m of pre-wired high quality yellow signal cable with 4 wires and a shield covered with black sleeve. Suitable for the following Kipp & Zonen equipment. CMP Series pyranometers, CGR3 & CGR4 pyrgeometers and CVF4 & CNF4 ventilation units.
£84.00
or call us for a quote
0362613
Waterproof 4-pin plug connector with 25m of pre-wired high quality yellow signal cable with 4 wires and a shield covered with black sleeve. Suitable for the following Kipp & Zonen equipment. CMP Series pyranometers, CGR3 & CGR4 pyrgeometers and CVF4 & CNF4 ventilation units.
£179.00
or call us for a quote
0362614
Waterproof 4-pin plug connector with 50m of pre-wired high quality yellow signal cable with 4 wires and a shield covered with black sleeve. Suitable for the following Kipp & Zonen equipment. CMP Series pyranometers, CGR3 & CGR4 pyrgeometers and CVF4 & CNF4 ventilation units.
£336.00
or call us for a quote