Mounting; Mounting Instructions - Vega VEGAPULS 6X Quick Setup Manual

3 Mounting

Polarisation
Mounting position -
liquids
6
3 Mounting
3.1

Mounting instructions

Radar sensors for level measurement emit electromagnetic waves.
The polarisation is the direction of the electrical share of these waves.
It is identifiable by a mark on the housing, see the following drawing:
Fig. 2: Position of the polarisation
1 Nose for marking the direction of polarisation
Turning the housing changes the polarisation and thus also 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.
> 200 mm
(7.87")
Fig. 3: Mounting of the radar sensor on round vessel tops
In vessels with conical bottom it can be advantageous to mount the
device in the centre of the vessel, as measurement is then possible
down to the bottom.
In this case, it is recommended to repeat the false signal suppression at a
1)
later time with existing buildup.
1
1)
VEGAPULS 6X • Two-wire 4 ... 20 mA/HART