Fema DCM Series Assembly And Operating Instructions Manual page 47

8.4 Setting of switching point
The switching point can be set within the range
given in the datasheet by using a screwdriver
on the setting spindle.
Additionally you should remove the terminal
board casing (with 4 hexagon screw M 4).
The affixing screw on the front end (above the
scale) has to be removed and should be
reattached after setting the switching point.
Turning the setting spindle clockwise gives a
lower switching point, turning anticlockwise
gives a higher switching point.
The scale should be used as a guide, for more
exact settings you should use a manometer.
8.5 Serial numbers
All switch units and their respective terminal
board casings are marked with a serial number.
When installing you should ensure that the
terminal board casings do not get mixed up.
Important notice
When installing the Ex switch units and setting
them up for operation you should comply with
the recognised rules and guidelines for
installations in Ex-areas.
1 Potential equalisation
2 Protective casing for terminals (removable)
3 Connection terminals
4 Cable inlet M16 x 1.5
5 Switching point adjustment
6 Locking bolt for setting spindle
7 Protection of the conductive connection
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