5°
+
-
F
ig
.
10
:
O
rientation of the sensors
T
he emitting unit emits electromagnetic waves
.
T
he polarisation plane
is the direction of the electrical wave component
.
I
ts position is marked
on the instrument hexagon by polarisation markings
.
F
or a reliable function
,
the emitting and receiving unit must be installed
in the same polarisation direction
.
I
f several instrument pairs are installed in a vessel
,
the instrument pairs
can be coded by di
ff
erent polarisation positions to avoid that they
in
fl
uence one another
.
2
1
1
2
F
ig
.
11
:
O
rientation according to the polarisation direction
1
P
olarisation marking on top
2
P
olarisation marking lateral
VEGAMIP U
61
• -
R
elay
17
4
M
ounting
-
EN
-
100531
