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2. Product Overview
2.1 Vaisala Wind Vane WAV151
WAV151 is a counter-balanced, low-threshold, optoelectronic wind vane that measures wind
direction. Infrared LEDs and phototransistors are mounted on 6 orbits on each side of a 6‑bit
GRAY-coded disc. When the vane turns the disc, the disc creates changes in the code received
by the phototransistors. The output code resolution is ±2.8°.
A heating element in the shaft tunnel keeps the temperature of the bearings above the
freezing level in cold climates. The nominal heating power is 10 W. Vaisala recommends that
you use a thermostat switch in the cross arm for switching the heating power on below +4 °C
(+39 °F).
2.2 Safety
This product has been tested for safety. Note the following precautions:
WARNING!
periodically. Failure to provide proper grounding can result in injury or death
from electrical shock and can severely damage the equipment.
CAUTION!
malfunction. Any modification voids your warranty.
Ground the product and verify outdoor installation grounding
Improper modification can damage the product or lead to
Chapter 2 – Product Overview
1
Vane assembly
2
Sensor shaft
3
Lower body
5
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