SICK LFV 330, Operating Manual

Page: 55 / 80

F
ig
.
8
: I
n fl owing medium
T o minimise
fl
ow resistance caused by the tuning fork
,
LFV
330
should
be mounted in such a way that the surfaces of the blades are parallel
to the product movement
.
D ue to the e
ff
ects of agitators
,
equipment vibration or similar
,
the level
switch can be subjected to strong lateral forces
.
F or this reason
,
do not
use an overly long extension tube for LFV
330
,
but check if you can
mount a level switch LFV
310
on the side of the vessel in horizontal
position
.
E xtreme vibration caused by the process or the equipment
,
e
.
g
.
agitators or turbulence in the vessel
,
can cause the extension tube of
LFV
330
to vibrate in resonance
.
T his leads to increased stress on the
upper weld joint
.
S hould a longer tube version be necessary
,
you can
provide a suitable support or guy directly above the tuning fork to
secure the extension tube
.
T his measure applies mainly to applications in E x areas category
1
G or
WHG
.
M ake sure that the tube is not subject to bending stress due to
this measure
.
F lows
A gitators
LFV
330
• -
contactless electronic switch
15
4
M ounting
35914
-
EN
-
091126