VEGA VEGAPULS 61 (≥ 2.0.0 - ≥ 4.0.0) Profibus PA Approval according to LPR radio standard - Manual (Page 20)

If large vessel installations such as struts or supports cause false
echoes, these can be attenuated through supplementary measures.
Small, inclined sheet metal baffles above the installations scatter the
radar signals and prevent direct interfering reflections.
Fig. 14: Cover smooth profiles with deflectors
If there are agitators in the vessel, a false signal memory 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.
Fig. 15: Agitators
Through the action of filling, stirring and other processes in the vessel,
compact foams that considerably damp the emitted signals may form
on the product surface.
If foams are causing measurement errors, the biggest possible radar
antennas, the electronics with increased sensitivity or low frequency
radar sensors (C band) should be used.
Agitators
Foam generation
20 VEGAPULS 61 • Approval according to LPR radio standard
4 Mounting
41715
-EN
-120301