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The wind direction transmitters are shipped in semi-mounted state, in order to avoid transport
damages and to keep the package small.
The following parts are included in delivery:
1 x wind direction transmitter, pre-mounted
1 x cup star
1 x wind vane
1 x connecting plug
2 Range of application
The wind direction transmitter is designed for the acquisition of the horizontal wind direction. The
measuring value is output proportionally to wind direction as analogue voltage in case the
potentiometer is supplied by a constant voltage. The measuring data available are ideally adapted
to the supply in display instruments, recording instruments, datalogger, as well as process control
systems.
For winter operation the instruments are equipped with an electronically regulated heating in order
to guarantee a smooth running of the ball bearings, and to avoid ice-formation at the slot of the
outer rotation parts. The electrical supply of wind transmitter heating is carried out, for ex., by our
power supply unit, order-no. 9.3388.00.000.
3 Construction and Mode of Operation
The housing and wind vane are made of aluminum, die the surfaces are anodized. Labyrinth seals
and o-rings protect the sensitive internal parts from precipitation. The instrument is designed for
mounting to a mast tube; the electrical plug connection is situated in the transmitter shaft.
The wind direction is detected by means of a low-inertia wind vane, the ball bearing axis of which is
connected to a potentiometer.
4 Recommendation Site Selection / Standard Installation
In general, wind measurement instruments should be able to detect wind conditions over a broad
range. In order to obtain comparative values of the surface wind, measurements should be taken at
a height of 10m above a flat, open terrain. Open terrain means that the distance between the wind
transmitter and an obstacle is at least 10 times greater than the height of the obstacle itself. If this
requirement cannot be fulfilled, then set the wind transmitter up at a height where the influence of
local obstacles on the measured values is minimal (about 6-10 m above the level of the obstacle). If
the wind transmitter is set up on a flat roof, then place it is the center of the roof and not at the edge
in order to avoid privileged directions.
Summary of Contents for 4.3120.22 Series
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