17
6 Setup
VEGATOR 131 •
46836-EN-191010
Fig. 6: Application examples of dry run protection with a conductive point level
sensor
1. Make sure that switch 1 on the DIL switch block is set to "min.".
The switches for the switch-on and switch-off delay should be set
to "
0 s
".
2. The vessel should be empty i.e. the sensor must not be covered
3. Set the potentiometer to the left end position, the yellow LED
display does not light
4. Fill the vessel until the electrode is covered approx. 1 cm
5. Turn the potentiometer slowly clockwise until the yellow LED
lights up. Turn the potentiometer a little further (approx. 2 scale
lines) so that the switching point is always safely reached.
6.4 Proof test
Note:
When handling environmentally hazardous substances, danger to the
environment and to persons must be avoided. After setup, the proper
functioning of the instrument must be ensured by means of the proof
test described below.
•
Detection of line break: Disconnect the sensor cable for the
duration of this test
– The red fault LED must light up
–
The relay must be deenergized
•
Switching point monitoring (overflow protection): Fill the ves-
sel up to the set switching point
– When the switching point is reached, the respective relay must
deenergize
•
Switching point monitoring (dry run protection): Empty the
vessel down to the set switching point
– When the switching point is reached, the respective relay must
deenergize
Dry run protection (min.
operation)
Содержание VEGATOR 131
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