VEGA VEGASON 66 4 … 20 mA_HART four-wire - Manual (Page 21)

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.
Fig. 12: Agitators
Large material heaps are detected with several instruments,
which can be mounted on e.g. traverse cranes. For this type of
application, it is best to orient the sensor toward the solid
surface.
Fig. 13: Transducers on traverse crane
Do not mount the instruments in or above the filling stream.
Make sure that you detect the product surface and not the
inflowing product.
Agitators
Material heaps
Inflowing medium
VEGASON 66 - 4 ... 20 mA/HART - four-wire 21
Mounting
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