Vega VEGASON 61 Operating Instructions Manual page 16

Ultrasonic sensor for continuous level measuremen

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4 Mounting

Vessel installations

Agitators

Fig. 10: Beam deflector

The ultrasonic sensor should be installed at a location where no

installations cross the ultrasonic beam.

Vessel installations such as for example, ladders, limit switches, heat-

ing spirals, struts etc. can cause false echoes that interfere with the

useful echo. Make sure when planning your measuring site that the

ultrasonic signals have a "clear view" to the measured product.

In case of existing vessel installations, a false signal suppression

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 or plastic baffles above the installations

scatter the ultrasonic signals and avoid direct false echoes.

Fig. 11: Cover flat, large-area profiles with deflectors

If there are agitators in the vessel, a false signal suppression 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.

~200

VEGASON 61 • Four-wire 4 ... 20 mA/HART

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