VEGA VEGAPULS 56V - Manual (Page 31)

VEGAPULS 56V 31
0
10 m
0 m
20 m
20 ••
30 ••
50 %
3,5 m
5,0 m
3,5 m
5,0 m
100 %
0
10 m
0 m
20 m
30 ••
40 ••
100 %
50 %
5,3 m 5,3 m
6,8 m 6,8 m
Emission cone of a DN!100 horn antenna
Measuring
distance
Emission cone and false reflections
The radar signal is focused by the antenna
system. The signal leaves the antenna in
conical form similar to the beam pattern of a
spotlight. This emission cone angle depends
on the antenna used.
Any object in this emission cone causes a
reflection of the radar signal. Within the first
few metres of the emission cone mechanical
obstructions cause strong false reflections. In
a distance of 6 m the false signal of a pipe
has 9-times more amplitude than at a dis-
tance of 18 m.
Mounting and installation
Emission cone of a DN 150 horn antenna
Measuring
distance
emitted power
emitted power
emitted power