User`s guide

Chapter 2 __________________________________________________________ Product Overview
VAISALA _______________________________________________________________________ 21
Bird Cage
Vaisala recommends using the optional bird cage in areas with large bird
populations. The cage is designed to prevent large birds from disturbing
the measurement. It has been tested in a wind tunnel with wind speeds of
up to 40 m/s without noticeable effects on the wind speed and direction
measurement.
You can install the bird cage on a mounted WMT700 series wind sensor
without dismounting the wind sensor itself. In cold climates, take into
account that accumulated snow or ice on the bird cage can disturb
measurement. In such conditions, consider performing frequent visual
inspections of WMT700 to avoid ice or snow build-ups.
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Figure 4 Bird Cage