VEGA VEGASON 54V…56V - Manual (Page 31)

VEGASON 54V … 56V 31
Open vessels
Min. meas.
distance
Dished tank ceiling
On dished tank ceilings, please do not mount
the instrument in the centre, but approx.
1 /
2
vessel radius from the centre. Dished tank
ceilings can act as paraboloidal reflectors. If
the transducer is placed at the focal point of
the parabolic ceiling, the transducer receives
amplified false echoes. The transducer
should be mounted outside the focal point.
Amplified echoes caused by parabolic sur-
faces are thereby avoided.
Mounting and installation
Reference plane
< 100 mm
VEGASON 54 on dished vessel ceiling; the state-
ments are also valid for VEGASON 55
Reference plane
1 /
2
vessel radius
< 400 mm
VEGASON 56 on dished tank ceiling
Reference plane
1 /
2
vessel radius
Open vessels
On open vessels, use of instruments on an
extended mounting bracket is recom-
mended. Mount the low-weight sensor onto
such a bracket and ensure a sufficient dis-
tance to the vessel wall.
Min. meas.
distance
Reference plane