Kobold PSE series, Operating Instructions Manual

Page: 14 / 35

PSR/PSE
page 14 PSR/PSE K23/0322
Switch Point Adjustment
When adjusting the switch point, the clamp plate in the top of the upper housing
must be loosened, enabling the switching unit to be repositioned. For ease of
adjustment, the switching unit is marked with a white and a red arrow. The front
edge of the clamp plate serves as the adjustment marker.

Normally open contact
(standard setting, as shipped)
The switch range is adjustable in the
area of the red arrow. By sliding the
switching unit in the direction of flow,
the minimum switching value given in
the table is achieved. By sliding the
switching unit in the opposite direction,
the maximum listed switch value is
achieved.

Normally closed contact
The switch range is adjustable in the area of the white arrow. By sliding the
switch unit in the direction of flow, the minimum switch value given in the table is
achieved. By sliding the switch unit in the opposite direction, the maximum listed
switch value is achieved.

Option: Changeover contact
The following options for wiring apply:
Black and brown conductor =
contact opens at decreasing flow.
Black and red conductor = contact closes at decreasing flow.
After successful adjustment, tighten the clamp plate by means of the screws.
Hysteresis
The Hysteresis is defined as the difference between the opening and closing flow
values of a contact. For example, the model PSR 11083 with minimal switching
adjustment and increasing flow is switching on at 2.3 l/min and will switch off at
1.6 l/min at decreasing flow. Contact hysteresis = 0.7 l/min.