VEGA VEGACAP 62 - two-wire - Manual (Page 22)

22
7 Maintenance and fault rectification
VEGACAP 62 • - two-wire
30007-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 on the
signal condition-
ing instrument
Set the correct mode on the mode
switch of the signal conditioning in-
strument (A: overflow protection, B:
dry run protection). Wiring should be
carried 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
Push the mode switch (A/B) on the
signal conditioning instrument. If the
signal conditioning instrument then
changes the mode, the probe may
be mechanically damaged. Should
the switching function in the correct
mode still be faulty, return the probe
for repair.
Check if there is buildup on the probe,
and if so, remove it.
Unfavourable in-
stallation location
Check if the probe is covered by build-
up on the socket.
Mount the instrument at a location
in the vessel where e.g. no mounds
can form.
Signal lamp flash-
es red
Electronics mod-
ule has detected a
failure
Exchange the instrument or send it in
for repair
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