20
4 Mounting
NCR-84 Two-wire 4 … 20 mA/HART
51141-EN-181127
Fig. 9: Adjustment of the angle of inclination
Fig. 10: Turning by fastening in the centre
4.4 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. 11: Position of the polarisation
1 Nose for marking the direction of polarisation
Note:
When the housing is rotated, the direction of polarization changes
and hence the influence of the false echo on the measured value.
Please keep this in mind when mounting or making changes later.
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,
Polarisation
Installation position
925-0373 Rev A