KROHNE OPTISOUND 3030C 2wire EN - Manual (Page 14)

~200
~400x400
4
5
°
Fig. 10: Beam deflector
The ultrasonic sensor should be installed at a location where
no installations cross the ultrasonic beam.
Vessel installations such as for example, ladders, limit
switches, heating spirals, struts etc. can cause false echoes
superimposed on the useful echo. Make sure when planning
your measuring site that the ultrasonic signals have "free
access" to the measured product.
If there are existing vessel installations, a false echo storage
should be carried out during setup.
If large vessel installations such as struts or supports cause
false echoes, these can be attenuated through supplementary
measures. Small, inclined sheet metal or plastic baffles above
the installations scatter the ultrasonic signals and avoid direct
false echoes.
Fig. 11: Cover smooth profiles with deflectors
If there are agitators in the vessel, a false echo storage should
be carried out with the agitators in motion. This ensures that
the interfering reflections from the agitators are saved with the
blades in different positions.
Vessel installations
Agitators
14 OPTISOUND 3030 C - 4 … 20 mA/HART
Mounting
30511
-EN
-050914