3 measurement of solids, Swivelling holder, Flange mounting – VEGA VEGASON 51P…53P Profibus PA User Manual

Page 26: Pump shaft

VEGASON 51P … 53P

Swivelling holder

A swivelling holder enables not only correct
orientation to the product surface but also
minimisation of possible false echoes.

Our line of accessories contains a swivelling
holder (mounting loop) for mounting VE-
GASON 53. It enables optimum orientation of
the sensor to the product surface.

VEGASON 53 on vessel flange

Reference plane

Min. distance

4.3 Measurement of solids

Flange mounting

As with applications for liquids, the instrument
can be mounted on a short DIN socket con-
nection on vessels for solids. The transducer
axis should only point to the vessel outlet or
should be directed perpendicular to the
product surface and must be very short
(< 100 mm).

Mounting and installation

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Shaft pump

Measuring tube

Shaft pump

³ 100 mm

see “4.4 Socket extension“

Socket piece

min.
distance

Meas. range

Example of a socket extension or measuring tube in a
shaft

Pump shaft

Narrow, uneven shafts, wells and vessel
openings with very rough walls and shoul-
ders make ultrasonic measurement ex-
tremely difficult due to strong false echoes.
This problem can be overcome by using an
extended socket piece or a complete meas-
uring tube (see chapter "4.5 Socket exten-
sion“).

Very good measuring results can be attained
with a measuring tube in continuous narrow
shafts, see figure. The applied measuring
tube must have smooth walls inside (e.g. PE
sewage pipe) and a diameter

³ 200 mm. This

arrangement works well as long as the inside
of the measuring tube collects no dirt or
buildup (cleaning necessary). You might
want to consider using hydrostatic pressure
transmitters or capacitive measuring probes.
Either the measuring tube should never be
immersed in the medium, or it must always
be immersed, so that the measurement is
carried out exclusively in the tube.