6
3 Mounting
VEGAPULS 6X • Two-wire 4 … 20 mA/HART
66376-EN-220111
3 Mounting
3.1 Mounting instructions
Radar sensors for level measurement emit electromagnetic waves.
The polarization is the direction of the electrical component of these
waves.
The polarization direction is marked by a nose on the housing, see
following drawing:
1
Fig. 2: Position of the polarisation
1 Nose for marking the direction of polarisation
Turning the housing changes the polarisation and thus the effect of
false echoes on the measured value.
Note:
Therefore, pay attention to the position of the polarisation when
mounting or when making subsequent changes. Fix the housing to
prevent a change in the metrological properties (see chapter "
Hous-
ing features
").
When mounting the device, keep a distance of at least 200 mm
(7.874 in) from the vessel wall. If the device 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
").
Note:
If you cannot maintain this distance, you should carry out a false
signal suppression during setup. This applies especially if buildup on
the vessel wall is to be expected.
1)
> 200 mm
(7.87")
Fig. 3: Mounting of the radar sensor on round vessel tops
Polarisation
Mounting position -
liquids
1)
In this case, it is recommended to repeat the false signal suppression at a
later time with existing buildup.