User manual

MANUALS
Technical changes reserved
0141 0316-112 05.2014
Level controller for conducting liquids
WLS-GEH230V
3.2 Switching point adjustment
The switching point is adjusted as per conductivity of water with
the preset potentiometers. In normal practice, it is good enough
to leave the potentiometer in the most sensitive position (left side
limit). This corresponds to a switching point of approx. 12 µS. This
works for most of the applications with clean rain water or tap water.
If required, the sensitivity of each electrode can also be separately
adjusted. By turning the potentiometer in the anti-clockwise direc-
tion, the electronics become less sensitive and this gives better
results with contaminated water. In normal practice, all potentiome-
ters should be kept at the same position and only for very diverse
conditions of electrodes with respect to the reference electrode or
for different lengths of connection lines, it is practically required to
separately adjust the sensitivity. After any change in cable length
of the connection lines, the adjustment should be checked again.
3.3 Light emitting diodes (LEDs)
The device status is indicated by a set of 8 LEDs which are placed at the lower edge of the PCB:
LED Funktion
P Power, Operating voltage 5 V
E Container empty, none of the electrodes are in contact
L1 Level 1 (rst electrode from the container bottom)
L2 Level 2 (second electrode from the container bottom)
L3 Level 3 (third electrode from the container bottom)
L4 Level 4 (fourth electrode from the container bottom)
R2 Status Relay 2, for upper electrode pair E3 and E4
R1 Status Relay 1, for lower electrode pair E1 and E2
The LEDs are also provided on the front side for display of device status. In addition, two pushbuttons are also provided by which the
relays can be manually switched ON.
3.4 Conguration of operating mode
The switching polarity of the relay (Fill/empty) can be adjusted by two jumper plugs. The jumper plug “MODE1“ is meant for Relay 1
(lower level) and jumper plug “MODE2“ is for Relay 2 (upper level).If connected in position 1-2, the relay switches ON with rising level
and in position 2-3, the relay switches ON with falling level.
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