VEGA VEGAPULS 63 (≥ 2.0.0 - ≤ 3.8) Profibus PA - Manual (Page 17)

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. 10: 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. 11: Agitators
Through the action of filling, stirring and other processes in the vessel,
dense foams which considerably damp the emitted signals may form
on the product surface.
If foams lead to measurement errors, you should use the biggest
possible radar antennas and low frequency radar sensors (C-band).
As an alternative, sensors with guided microwave can be used. These
are unaffected by foam generation and are best suited for such
applications.
Agitators
Foam generation
VEGAPULS 63 • Profibus PA 17
4 Mounting
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