VEGA VEGACAP 27 - Relay (DPDT) - Manual (Page 18)

18
7 Maintenance and fault rectification
VEGACAP 27 • - Relay (DPDT)
33758-EN-130916
Error Cause Rectification
– The instrument
signals covered
without cover-
ing with the
medium
– The instrument
signals covered
with cover-
ing with the
medium
Wrong mode se-
lected
Set the correct mode on the mode
switch (A - overflow protection, B - dry
run protection). Wiring should be car-
ried out according to the quiescent
current principle.
Operating voltage
too low
Check operating voltage
Shortcircuit in the
probe, e.g. be-
cause of moisture
in the housing
Remove the electronics module.
Check the resistance between the
marked plug connections. See the fol-
lowing instructions.
Electronics de-
fective
Press the mode switch (A/B). If the in-
strument then changes the mode, the
instrument may be mechanically dam-
aged. Should the switching function in
the correct mode still be faulty, return
the probe for repair.
Push the mode switch. If the probe
then does not change the mode, the
electronics module may be defective.
Exchange the electronics module.
Remove the electronics module. Check the resistance between the
two plug connections.
There must no longer be a connection (high impedance). If there is
still a connection - exchange the instrument or return it for repair
Checking the switching
signal
Check the resistance in
the probe