VEGA VEGAPULS 61 (≥ 2.0.0 - ≥ 4.0.0) Profibus PA User Manual

Page 21

4 Mounting

VEGAPULS 61 • Profibus PA

36501-EN-121011

Make sure when planning your measuring site that the radar sensor

has a "clear view" to the measured product.
In case of 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 baffles above the installations scatter the

radar signals and prevent direct interfering reflections.

Fig. 18: 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 interfer-

ing reflections from the agitators are saved with the blades in different

positions.

Fig. 19: 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.
As an alternative, sensors with guided microwave can be used. These

are unaffected by foam generation and are best suited for such ap-

plications.

Agitators

Foam generation