5 - 14
021075/08/11
2 Application
The wind transmitter detects the horizontal wind speed. The measured values are available at the
output as analogue voltage or current signal to control for instance wind power plant..
An electronically-regulated heating system has been installed in some models (see chapter 1) for
winter time use, in order to prevent the ball-bearing and the external rotation parts from freezing.
Thanks to the 60-Watt-heating as well as to the optimized regulating characteristic, model no.
4.3519.
40
.xxx is especially suited for the extremely difficult application in high mountains or at other
critical sites, where icing is to be expected.
3 Mode of Operation
The cup star (in ball bearing) is set into rotation by the wind. An opto-electronic speed scanning
produces a frequency which is transformed into an analogue signal by an integrated measuring
transformer.
The outer parts of the instrument are made of corrosion-resistant materials. Labyrinth gaskets
protect the parts inside the instrument against precipitations.
4 Recommendation Site Selection / Standard Installation
In general wind measurement instruments should be able to detect the wind conditions of a large
area. In order to obtain comparable values when determining the surface wind, measurements
should be taken at a height of 10 meters over an even area with no obstacles. An area with no
obstacles means that the distance between the wind direction transmitter and an obstacle should
be at least 10 times the height of the obstacle (s. VDI 3786 ). If it is not possible to fulfil this
condition then the wind direction transmitter should be set up a height where local obstacles do not
influence the measured values to any significant extent (approx. 6-10 m above the obstacle). The
wind direction transmitter should be set up in the centre of flat roofs and not on the edge in order to
avoid any preferential directions.
5 Installation
Attention:
Storing, mounting and operation under weather conditions is
permissible only in vertical position, as otherwise water can get into
the instrument.
Summary of Contents for 4.3519 Series
Page 13: ...13 14 021075 08 11...
