11
4 Mounting
OPTISWITCH 4000 C • Transistor (PNP)
42372-EN-191122
The vibrating level switch is a measuring instrument and must be
treated accordingly. Bending the vibrating element will destroy the
instrument.
Warning:
The housing must not be used to screw the instrument in! Applying
tightening force can damage internal parts of the housing.
Use the hexagon above the thread for screwing in.
4.2 Mounting instructions
For threaded versions of OPTISWITCH 4000 C in combination with a
mounting boss with O-ring in front and welding marking.
OPTISWITCH 4000 C with thread sizes ¾" and 1" have a defined
thread. This means that every OPTISWITCH 4000 C is in the same
position after being screwed in. Remove therefore the supplied flat
seal from the thread of OPTISWITCH 4000 C. This flat seal is not
required when using a welded socket with front-flush seal.
Before welding, unscrew OPTISWITCH 4000 C and remove the rub-
ber ring from the welded socket.
The welded socket is provided with a marking (notch). For horizontal
mounting, weld the socket with the notch facing upward or downward;
in pipelines (DN 25 to DN 50) aligned with the direction of flow.
1
Fig. 5: Marking on the welded socket
1 Marking
In case of horizontal mounting in adhesive and viscous products,
the surfaces of the tuning fork should be vertical in order to reduce
buildup on the tuning fork. The position of the tuning fork is indicated
by a marking on the hexagon of OPTISWITCH 4000 C. With this,
you can check the position of the tuning fork when screwing it in.
When the hexagon touches the seal, the thread can still be turned by
approx. half a turn. This is sufficient to reach the recommended instal
-
lation position.
In adhesive and viscous products, the surfaces of the tuning fork
should protrude into the vessel to avoid buildup. Therefore sockets for
flanges and mountings bosses should not exceed a certain length.
Handling
Welded socket
Adhesive products
