VEGA VEGASON 54P…56P Profibus PA - Manual (Page 18)

18 VEGASON 54P … 56P
Open vessel
Min. meas.
distance
Dished tank top
On dished tank tops, please do not mount
the instrument in the centre or close to the
vessel wall, but approx. ½ vessel radius from
the centre. Dished tank ends can act as
paraboloidal reflectors. If the transducer is
placed in the focal point of the parabolic tank,
the ultrasonic sensor receives amplified false
echoes. The transducer should be mounted
outside the focal point. Parabolically amplified
echoes can be thereby avoided.
Mounting and installation
Reference plane
< 100 mm
VEGASON 54 on dished tank top; applies also to
VEGASON 55
Reference plane
½ vessel radius
< 400 mm
VEGASON 56 on dished tank top
Reference plane
1 /
2
vessel radius
Open vessels
On open vessels, the sensors can be readily
installed on extended mounting brackets.
Mount the low-weight sensor onto such a
bracket and ensure a sufficient distance from
the vessel wall.
Min. meas.
distance
Reference plane