Vaisala WAC151, User Manual, Page: 11 / 26

Figure 2 Recommended mast length on top of building
The recommended minimum length (h) for the mast that is installed on the top of a building is
1.5 times the height of the building (H). When the diagonal (W) is less than the height (H) the
minimum length of the mast is 1.5 × W.
3.2 Installing Cross Arm WAC151
If you install the equipment in tropical, marine, or cold environments, keep the
equipment within its specific operating conditions. To avoid dust, dirt, or water
from entering the equipment, tighten the cable glands properly.
Using a long cable between different units (sensors, transmitters,
power supplies, and displays) can cause a lethal surge voltage, if a lightning
strike occurs in the vicinity. Always ground the mast equipment case close to
the mast with a short and low-resistance cable.
WARNING!
Chapter 3 – Installation
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