Pressure Monitors With Adjustable Switching Difference - Fema DWR Série Instructions De Montage Et De Service

2. Pressure monitors with adjustable switching difference DWR...-203
(not for DGM...)
2.1 Technical data as for 1.1
2.2 Electrical connection as for 1.2
2.3 Pressure connection as for 1.3
2.4 Setting
One spindle each is available for setting the switching pressure and the switching difference. Both
spindles are arranged concentrically. The outer spindle with larger diameter influences the lower
switching point, the switching difference and thus the upper switching point, is changed with the small
grub screw located internally.
The action direction is indicated by the arrow direction.
Setting sequence
a) Lower switching (with decreasing pressure),
with outer spindle, according to scale or pressure
gauge.
b) Switching difference (with increasing pressure),
with small, internal grup screw, results in upper
switching point.
When the switching difference is changed,
the lower switch-off point remains
unchanged, the upper switching point
is shifted by the switching difference.
RSP = SP + xd
SP = switching point RSP = switch back point
xd = switching difference (hysteresis)
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