VEGA Capacitive electrodes EK … with signal conditioning instrument - Manual (Page 31)

Capacitive electrodes EK with signal conditioning instrument 31
Diagnosis
5 Diagnosis
5.1 Simulation
Test switch
A test switch can be optionally integrated in
the housing to simulate a switching condition.
By pushing the test switch, an additional
capacitance is connected. Just the function
of the oscillator and the connected instru-
ments are tested.
Note
When the changeover switch is set to posi-
tion 3, it can be possible that the connected
capacitance is not sufficient to carry out a
test.
The test switch can be used to simulate a
max. level (overfill protection).
Test
Set the test switch to position 1. The
changeover of the test switch to position 1
increases the capacitance of the uncovered
electrode, so that the oscillator responds and
triggers a full signal. The connected instru-
ments will be activated.
Note
It is absolutely necessary to reset the test
switch to basic position (position 0) after the
test.
5.2 Maintenance
The instrument is maintenance free.
5.3 Repair
Due to safety and guarantee reasons repair
work beside the wiring must only be made
by VEGA-staff.
In case of a defect, please return the appro-
priate instrument with a short description of
the error to our repair department.
Failures are short-term malfunctions of the
instrument which are caused by wrong ad-
justment or defect on the sensor or the con-
nection lines.
Failures, possible reasons and their removal
are stated under "5.4 Failure removal“.