Vaisala WMT700 - Manual (Page 85)

Chapter 4 ________________________________________________________________ Installation
Heated Transducers and Arms
In addition to heated transducers, the array arms can also be
heated, which prevents ice build-up on the arms.
The functional principle is the same as with the heated
transducers only, but the maximum heating power is limited to
200 W and the average heating power is limited to 150 W.
WARNING Some WMT700 product versions provide heating for transducers and/or
array arms. To avoid injury, do not touch the heated parts of the wind
sensor when the heating is enabled.
Heated Body, Transducers, and
Arms
The fully heated version of WMT700 is suitable for harsh weather
conditions. It provides heating for the sensor body, transducers,
and arms.
The functional principle is the same with the heated transducers
and arms. Body heating is controlled independently of transducer
and arm heating. The maximum heating power for the fully
heated WMT700 is 350 W and the average heating power is 250
W in harsh weather conditions. The inner temperature of the unit
is measured continuously. If the inner temperature starts rising,
body heating power automatically reduces to retain the optimum
inner temperature of WMT700.
VAISALA ________________________________________________________________________ 83