KROHNE OPTISOUND 3030C 2wire EN - Manual (Page 11)

particularly if the level is very low. With pressures under -
0.2 bar (-20 kPa) you should use a different measuring
principle, e.g. radar or guided radar (TDR).
4.2 Mounting information
When mounting OPTISOUND 3030 C, keep a distance of at
least 200 mm (7.9 in) to the vessel wall. If the sensor is
installed in the center of dished or rounded vessel tops,
multiple echoes can arise. These can, however, be faded out
by an appropriate adjustment (see chapter "Setup").
If this distance cannot be maintained, a false echo storage
should be carried out during setup. This applies particularly if
buildup on the vessel wall is expected. In this case, we
recommend repeating the false echo storage later on with
existing buildup.
1 2
> 200 mm
Fig. 5: Mounting on dished vessel tops
1 Reference plane
2 Vessel center or symmetry axis
In vessels with conical bottom it can be advantageous to
mount the sensor in the center of the vessel, as measurement
is then possible down to the lowest point of the vessel bottom.
Installation position
OPTISOUND 3030 C - 4 … 20 mA/HART 11
Mounting
30511
-EN
-050914