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Parabolic effects of rounded or arched vessel tops, Mounting and installation – VEGA VEGASCAN 850 User Manual

Page 51

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VEGASCAN 850

51

<

100 mm

Wrong

Mounting on a vessel with parabolic tank top

Correct

~

1

/

2

vessel
radius

Wrong

Parabolic effects of rounded or arched
vessel tops

Round or parabolic tank tops act on the sig-
nals like a parabolic mirror. If the sensor is
placed at the focal point of such a parabolic
tank top, the sensor receives amplified false
echoes. The optimum location is generally in
the area of half the vessel radius from the
centre.

2 m

4 m

6 m

8 m

10 m

20 m

30 m

B

A

max. meas.
distance

Distance of the
transducer to the
vessel wall

Curve 1 (liquids)

Curve 2 (solids)

Distance from the sensor to the vessel wall, depend-
ing on the meas. distance (type 54 … 56)

Mounting and installation

1 m

2 m

3 m

4 m

5 m

5 m

10 m

15 m

B

A

max. meas.
distance

Distance of the
transducer to the
vessel wall

Curve 1 (liquids)

Curve 2 (solids)

Distance from the sensor to the vessel wall, depend-
ing on the meas. distance (type 51 … 53)