Figure 17 Recommended Mast Length on Top of Building
To protect personnel and the transmitter, install an air terminal with the
tip at leas
t one meter above the transmitter. It must be properly grounded, compliant
with all applicable local safety regulations.
WARNING!
Installations on top of high buildings or masts and in sites on open grounds
are vulner
able to lightning strikes. A nearby lightning strike can induce a high-voltage
surge not tolerable by the internal surge suppressors of the instrument.
Additional protection is needed in regions with frequent, severe thunderstorms,
especially when long line cables (> 30 m) are used. Vaisala recommends using a surge
protector, such as WSP150 and WSP152, in all sites with an elevated risk of lightning
strike.
CAUTION!
Chapter 4 – Installation
35
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