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Kipp & Zonen CVF4 Instruction Manual
Also see for CVF4: Instruction manualInstruction manual
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2.5 Electrical connectionsThe CVF4 has an optional 8-wire cable for connecting the 12 VDC to the ventilator and heater. The ground is common for theventilator, heater and the tacho output.The tacho output provides a 5 Volt signal that gives two pulses per revolution. It can be connected to a data logger to (remotely)check proper operation of the CVF4. Ventilator and heater ground are separated but may be connected. Ventilator and tachoground are connected via a 100 Ω resistor.The nominal speed is 4400 rpm, resulting in 8800 pulses per minute which equals 146 Hz on the tacho output.Changes often indicate pollution of the filter (higher frequency), or mechanical problems with ventilator (lower frequency).If sufficient power is available it is advised to use the heater in combination with the ventilator even in warm climates. Theheater will prevent deposition of dew in the morning.14Ventilation Unit ConnectionWire Function Connect withRed Heater - Ground (1)Blue Heater - Ground (1)HousingShieldTacho + Tacho output +Ventilator - Ground (2)Ventilator + + 12VDC @ 0.4A (2)Ground *White Heater + + 12VDC @ 0.5A (1)Black Heater + + 12VDC (1)YellowBrownGreenGrey Tacho - Tacho ground51287463* Connect to ground if radiometer not groundedGround 1/2 and +12 VDC 1/2 are separated but may be connected4356MVentilatorTTacho 100Ω712R 2R 1Heater 8 |
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