KROHNE LS 4100 EN - Manual (Page 8)

LS 4100/LS 4150 03/2002
8
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2.1 Mounting instructions
In principle, the level switch can be mounted in any position. The instrument must be mounted
such that the tuning fork is at the height of the required switching point. Note the following
installation instructions:
Switching point
The tuning fork is provided with lateral markings (notches, 25 mm from the fork tip), marking
the switching point with vertical installation for the medium water. When installing level switch note
that the switching point of the instrument shifts when the medium has a density differing from
water (water = 1.0 g/cm
3 ).
Flow (e.g. in pipes)
When mounting in pipes or in vessels with certain flow direction, you should mount level switch
such that the surfaces of the tuning fork are aligned with the direction of flow.
Adhesive products
In the case of adhesive and viscous products,
the tuning fork should protrude into the vessel
to avoid build-up in the mounting boss. A
mounting boss should therefore not exceed a
length of 30 mm.
In the case of horizontal mounting in adhesive
and viscous products, the surfaces of the tuning
fork should be vertical to reduce build-up on the
tuning fork. The position of the tuning fork is
marked by two notches on the hexagon of
level switch. Therefore you can check the
position of the tuning fork when screwing it in.
One notch should be on top. When the hexagon
touches the seal, the thread can be still turned
by approx. half a turn. This is sufficient to reach
the recommended installation position.
S w itch in g p o in t
S w itch in g p o in t w ith
lo w e r d e n sity
S w itch in g p o in t
w ith h ig h e r
d e n sity
Switching
point
Switching
point
25
75
30 mm
Switching
point
Top marking
Fig. 2.1
Fig. 2.2
Fig. 2.3