VEGA VEGASON 54V…56V - Manual (Page 34)

34 VEGASON 54V … 56V
Mounting and installation
Max. socket length in relation to socket diam-
eter
ø in mm L in mm
Type 54
Type 55 Type 56
200 400 – – – –
250 500 500 500
300 – – – – 600
Socket extensions for solids
For solids, use a conical socket extension
with a taper of at least 15° … 20°.
Socket extensions that do not protrude into the
measured product
ø
45˚
L
ø
45˚
L
Type 54 Type 55
Measurement in a tube
For nonadhesive measured products, a
socket extension in form of a measuring tube
can be permanently submerged in the prod-
uct. The ultrasonic measurement is then
made exclusively in the measuring tube and
works very well without interference from
other vessel installations (see "Pump shaft“).
Socket extension in solids
15˚ 15˚
4.6 False echoes
The mounting location of the ultrasonic sensor
must be selected such that no installations or
inflowing material are in the path of the ultra-
sonic impulses. The following examples and
instructions show the most frequent measur-
ing problems and how to avoid them.
Vessel protrusions
Vessel forms with flat protrusions can, due to
their strong false echoes, adversely effect
the measurement. Shields above these flat
protrusions scatter the false echoes and
guarantee a reliable measurement.
Intake pipes, e.g. for the mixing of materials -
with a flat surface directed towards the sen-
sor - should be covered with a sloping
shield. This shield will scatter false echoes.
Vessel protrusions (intake pipe)
Correct Wrong
Vessel protrusions (slope)
Correct Wrong