VEGA VEGAVIB 31-53 - Manual (Page 13)

VEGAVIB 13
Mounting
2 Mounting
2.1 Mounting instructions
VEGAVIB
Generally, the instruments can be mounted in
any position. The instrument must be mounted
so that the measuring system (vibrating rod) is
at the height of the requested switching point.
VEGAVIB 31, however, from below the vessel
bottom. Installation will vary depending on the
various measured products and the require-
ments on the measurement. You should give
consideration to the following points.
Lateral load
Make sure that the vibrating element is not
subjected to lateral forces. Mount the instrument
at a location in the vessel where no adverse
conditions, e.g. caused by stirrers, filling open-
ings etc. can occur. This applies mainly to
instrument types with cable or extension tube
(see fig. 2.1). The surfaces of the tuning fork of
VEGAVIB 31 should be parallel to the product
movement.
Stirrers
Through the action of stirrers or similar devices,
the level switches can be subjected to strong
lateral forces. For this reason, do not use an
overly long extension tube for VEGAVIB 43 and
VEGAVIB 53, but check if it is possible to mount
instead a VEGAVIB 41 or VEGAVIB 51 level
switch on the side of the vessel in horizontal
position.
Filling opening
Mount the instrument in such a way that the
vibrating element does not protrude directly into
the filling stream. If such a mounting location is
necessary, install a suitable protective sheet
above or in front of the vibrating element, e.g.
L80 x 8 DIN 1028 (see fig. 2.2 a). Mounting acc.
to Fig. 2.2 has proven successful for measuring
abrasive solids. A product cornice grows on the
concave protective sheet and keeps it from
being abraded.
Horizontal installation
To achieve a very precise switching point,
VEGAVIB can be mounted horizontally. However
if the switching point can have a tolerance of a
few centimetres, we recommend mounting the
instruments downwardly inclined (approx. 20°)
to avoid buildup (see fig. 2.2). Mount VEGAVIB
31 in such a way that the surfaces of the tuning
fork are vertical.
20 %
a. b.
Fig. 2.1
Fig. 2.2
Dimensions
The dimensions of the vibrating rod or the tun-
ing fork should not be modified. Any change will
destroy the instrument.