VEGA VEGASON 54K…56K - Manual (Page 33)

VEGASON 54K … 56K 33
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)
Sensor too close to the vessel wall
If the sensor is mounted too close to the
vessel wall (dimension A in diagram), strong
false echoes can be caused. Buildup, rivets,
screws or weld joints on the vessel wall su-
perimpose their echoes on the product or
useful echo. Please ensure the sufficient
distance of the sensor to the vessel wall,
depending on the maximum measuring dis-
tance (dimension B in diagram). In case of
good reflection conditions (liquids, no vessel
installations), we recommend determining the
sensor distance according to
Diagram curve
1 . At a max. meas. distance of e.g. 10 m, the
distance of the transducer (according to
curve 1) should be approx. 1.5 m. In case of
solids with bad reflection properties, deter-
mine the distance to the vessel wall accord-
ing to
Diagram curve 2 . Under very bad
measuring conditions (rough vessel walls,
struts), it might be necessary to increase the
distance to the vessel wall, or to also filter out
the false echoes by storing them in memory,
thereby adapting the sensor more precisely
to the environment.
Mounting and installation
Strong heat fluctuations
Strong heat fluctuations, e.g. due to the sun,
cause measuring errors. Please provide a
sun shield.
Min. distance to the medium
If the min. distance to the medium is not main-
tained, the instruments show wrong meas-
ured values. Mount the instrument at the
required min. distance.
Sensor too close to the vessel wall
Correct Wrong
Strong heat fluctuations
Shield