VEGA VEGAPULS 66 (≥ 2.0.0 - ≤ 3.8) 4 … 20 mA_HART four-wire User Manual
Page 18
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f large vessel installations such as struts or supports cause false
echoes, these can be attenuated through supplementary measures.
S
mall, inclined sheet metal baffles above the installations scatter the
radar signals and prevent direct interfering reflections.
Fig. 11: Cover smooth profiles with deflectors
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f 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.
Fig. 12: Agitators
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hrough 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.
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f foams are causing measurement errors, the biggest possible radar
antenna should be used.
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s 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
18
VEGAPULS
66 • 4 … 20
mA/HART four-wire
4 M
ounting
28443
-EN
-090305