Vega VEGAPULS 62 Operating Instructions Manual page 19

Polarisation
Installation position
VEGAPULS 62 • Profibus PA
The emitted radar impulses of the radar sensor are electromagnetic
waves. The polarisation is the direction of the electrical wave compo-
nent. By turning the instrument in the connection flange or mounting
boss, the polarisation can be used to reduce the effects of false
echoes.
The position of the polarisation is marked on the process fitting of the
instrument.
Fig. 4: Position of the polarisation
1 Marking with screwed version
2 Marking with flange version
When mounting the sensor, keep a distance of at least 200 mm
(7.874 in) from the vessel wall. If the sensor is installed in the center
of dished or round vessel tops, multiple echoes can arise. However,
these can be suppressed by an appropriate adjustment (see chapter
"Setup").
If you cannot maintain this distance, you should carry out a false
signal suppression during setup. This applies particularly if buildup on
the vessel wall is expected. In such cases, we recommend repeating
the false signal suppression at a later date with existing buildup.
> 200 mm
(7.87")
Fig. 5: Mounting of the radar sensor on round vessel tops
In vessels with conical bottom it can be advantageous to mount the
sensor in the centre of the vessel, as measurement is then possible
down to the bottom.
1
4 Mounting
2
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