Vaisala WMT700 - Manual (Page 62)

User's Guide ______________________________________________________________________
1005-001
Figure 20 Recommended Mast Length on Top of Building
where
h = Recommended minimum height for the vertical mast
H = Height of the building
W = Diagonal of the building
WARNING To protect personnel (and the wind sensor), install a lightning rod with
the tip at least one meter above WMT700. The rod must be properly
grounded, compliant with all local applicable safety regulations. Do not
install the wind sensor above the top of the lightning protection rod.
WARNING Do not install WMT700 when there is a risk of thunderstorm or lightning
activity in the area.
60 ___________________________________________________________________ M211095EN-E