VEGA VEGASON 51P…53P Profibus PA - Manual (Page 25)

VEGASON 51P … 53P 25
Mounting and installation
Mounting boss on dished tank ceiling
Open vessels
Reference
plane
£ 60 mm
1 /
2
vessel radius
Min. meas.
distance
Type 51: 0.25 m
Type 52: 0.4 m
Flange on dished vessel ceiling
Reference plane
1 /
2
vessel radius
Mounting on short 1 1 /
2
“ or 2“ socket piece
Reference plane
£ 60 mm
£ 60 mm
Reference plane
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.
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 from the vessel wall.