WIKA 712.15.160 Operating Instructions Manual page 15

10. Switch contacts
Mounting of switch contacts

First the snap fit style bezel with sealing ring, and the gauge window, must be removed. Prior
to attaching the transparent hood to the measuring instrument, the contacts must be adjusted
in accordance with their operating range.
Using the magnetic snap-action contact, the magnetic retention force must be adapted to the
instrument-specific conditions by adjusting (twisting) the screw-in magnet. The magnet must
then be protected against unintentional adjustment by using an appropriate locking varnish.
The small plate spring at the flexible contact arm must be angled accordingly.
The fully-adjusted unit must now be fitted to the gauge, together with the snap-fit bezel, and
aligned to the extent that the fork coupling guiding the flexible contact arms grips over the
gauge pointer without touching the dial. Should this occur, the carrying fork must be shorte-
ned using a suitable cutting tool.
The contacts are best adjusted when they are factory-fitted.
By snapping the bezel onto the case, the whole contact unit will be fixed to the pressure
gauge.
Connector plug
As counterpart to the connector base welded
onto the transparent hood
Material: PA 6 - GF 30
„
Colour: grey
„
Connection: stripped and tinned wires
„
Ingress protection: IP 65 per EN 60529 / IEC 529
„
For magnetic snap-action contacts:
Connector plug 3 poles + l (250 V max.)
„
with 2 m cable 4 x 1.0 mm
For inductive alarm sensors:
Low voltage execution without protective earth conductor
Connector plug 4 poles (50 V max.)
„
with 2 m cable 4 x 0.75 mm
Extent of delivery: 1 plug with cable,
1 central screw M3 x 20 and 1 gasket
WIKA operating instructions differential pressure gauge models 712.15.160, 732.15.160



Legend
 Self-contained unit with switch contact for level measurement
 Self-contained unit with switch contact for working pressure
 Connector plug
2
2

Gasket
GB
15