VEGA VEGASON 54P…56P Profibus PA - Manual (Page 20)

20 VEGASON 54P … 56P
2.5 Socket extensions
Ultrasonic sensors require a min. distance to
the liquid or solid. Take the min. distance into
account in your planning. In some situations,
it is possible to reach the required min. dis-
tance, and hence the desired filling height
with a socket extension. However, the socket
piece increases the noise level of the ultra-
sonic signal at the extension outlet and can
interfere with the measurement. Only use a
socket extension if all other possibilities have
to be excluded. Carry out the extension as
shown in the following illustration.
Socket extensions for liquids
Chamfer and deburr the socket carefully and
make sure that it has a smooth inner surface.
The socket should not protrude into the
measured product, in case buildup can form
on the socket through dirt or product
residues.
For non-adhesive measured products, a
socket extension in the form of a measuring
tube can be permanently submerged in the
product. 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 piece should not be immersed into adhesive
products (figure: VEGASON 54)
VEGASON 56 in 1" mounting boss.
Reference plane
Min. distance
Mounting and installation
Mounting boss
The socket axis should be oriented to the
product surface. More suitable is the use of a
swivelling holder version (type B, C), as
described on previous pages.
Material heaps
Large material heaps are usually measured
with several instruments, which can be
mounted on e.g. traverse cranes. If material
cones form, we recommend orienting the
sensors to the solid surface.
Transducer on traverse crane above a material heap