VEGA VEGASCAN 850 - Manual (Page 40)

40 VEGASCAN 850
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.
It is also possible to mount the sensors with
1
1 /
2
“ or 2“ thread to short socket pieces.
Flange version and swivelling holder on flat vessel
top
Reference
plane
Reference
plane
< 60 mm
Mounting of the transducer with 1“ thread (here
belonging to VEGASON 54 version D)
Reference
plane
Min. meas. distance
1.8 m
Min. meas. distance
1.4 m
Swivelling
holder
VEGASON 54 … 56 sensors in version C are
mounted in a 1“ thread.
Mounting on short 1 1 /
2
“ or 2“ socket pieces (VE-
GASON 51)
Reference plane
£ 60 mm
Mounting and installation
VEGASON 51, 52 on dished tank ceiling
Reference plane
1 /
2
vessel radius
£ 60 mm