Chapter 3 _______________________________________________________________ Installation
VAISALA_______________________________________________________________________ 31
WARNING
When the unit is operating in a tilted position, make sure that it is not
being viewed from the beam direction with magnifying optics.
NOTE
To avoid direct sunlight, tilt the unit away from the sun. That is, tilt it
north in the northern hemisphere and south in the southern hemisphere.
Direct solar radiation exposure will not damage the unit but may cause
alarms and temporarily invalidate the data.
As the benefits of different tilting directions may be contradictory or
cannot be realized simultaneously, the user must decide the direction of
the final installation.
Mounting the Optional Bird Deterrent
Ceilometer CL31 can be ordered with an optional bird deterrent; see
Figure 9 on page 32. When installed, it prevents birds from landing on
the ceilometer which could interfere with the measuring.
The bird deterrent kit consists of two side plates, a piece of fluorocarbon
line and two optional perches. To mount the bird deterrent, you need an 8
mm wrench and a 4 mm Allen-key.
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