VEGA VEGASON 54V…56V - Manual (Page 32)

32 VEGASON 54V … 56V
≥
250 mm
Shaft pump
Measuring tube
Shaft pump
see “4.5 Socket extension“
Socket piece
min.
distance
Meas. range
Example of a socket extension or measuring tube in a
shaft
4.4 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 must only point to the vessel outlet or
should be directed perpendicular to the
product surface. The socket length can be
max. 300 mm.
Mounting and installation
Pump shaft
Narrow shafts and shaft openings (vessel
openings) with very rough walls and shoul-
ders make an ultrasonic measurement ex-
tremely difficult due to strong false echoes.
This problems can be overcome by using an
extended socket piece or a complete meas-
uring tube (see chapter "4.5 Socket exten-
sion“).
VEGASON 54C with an adapter flange on a DN 200
vessel flange
Reference plane
Min. distance
Shaft
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
³ 100 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.