VEGA VEGASON 51P…53P Profibus PA - Manual (Page 28)

28 VEGASON 51P … 53P
Mounting and installation
Ultrasonic sensors require a min. distance to
the product or solid. Take the min. distance
into account in your planning. In some situa-
tions, it is possible to reach the required min.
distance, and hence the desired filling height,
with a socket extension. However, the socket
extension increases the noise level of the
ultrasonic 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.
Chamfer and deburr the socket carefully and
make sure it has a smooth inner surface. The
socket should not protrude into the meas-
ured product, in case buildup can form on
the socket through pollution or product resi-
dues.
For nonadhesive 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 page 26 "Pump
shaft“).
Socket piece should not be immersed into adhesive
products (figure: VEGASON 53)
Max. socket length in relation to socket diam-
eter
ø L in mm
in mm Type 51 Type 52 Type 53
100 200 300 300
150 300 400 400
200 – 500 500
250 – – 600
For solids, use a conical socket extension
with a taper of at least 15° … 20°.
Socket extension in liquids
ш
45
‡
ш
45
‡
L L
Type 51/52
Type 53
The socket diameter should be as large and
the socket length as small as possible. To
minimise false echoes, make sure that the
socket outlet is burr-free.
Socket extension in solids
15 ‡ 15‡