Pressure Switches
Inspection / Adjust
A5.05. 11.01.02.01
3750
M20-M601C
en / 17.12.2010 IB021686 3/3
11
3. Correction of the adjustment (Perfor-
mance with fixed switch difference)
(Fig. 3)
3.1 Remove the case cover by loosening the
4 locking screws.
3.2 Connect terminal (1 + 4) via cable with the
adjusting device.
3.3 Loosen the stop screw (A).
3.4 Remove the cover aside by loosening the
locking screw (B).
3.5 Set the upper or lower switching point (dif-
ferential pressure switch) by means of the
range spindle (C).
The lower or upper switching point
(differential pressure switch) results in the
fixed switching difference.
3.6 Tighten stop screw (A).
4. Removal of the adjusting device
4.1 Loosen the cable connection
(terminal 1 + 4).
4.2 Loosen the connection hose of the adjusting device screw on the union nuts with plug (Fig. 1/2).
4.3 Fit the cover.
4.4 Tighten the cover of the range spindle.
4.5 Mark or lead the impected or corrected pressure switches.
NOTE
The scale accuracy is ± 2 % of
the span. The instrument is in-
dividually calibrated (1 - 2 on)
so that no gauge inspection is
necessary.
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