Exchange Of The Electronics Module - Vega VEGACAP 65 Operating Instructions Manual

7 Diagnostics and servicing
Checking the switching
signal
Error
•
The instrument signals
covered without being
covered by the meas-
ured medium
•
The instrument signals
uncovered while covered
with the measured
medium
Signal lamp flashes red
Check the resistance in
the probe
24
Cause
Wrong mode selected on
the controller
Operating voltage too low
Shortcircuit in the probe,
e.g. because of moisture in
the housing
Electronics defective
Unfavourable installation
location
Electronics module has
detected a failure
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
Fig. 16: Check the resistance in the probe
1 Shielding
2 Measuring probe
3 Ground potential
7.3

Exchange of the electronics module

In general, all oscillators of series CP60 can be interchanged.
Rectification
Set the correct mode on the mode switch of the con-
troller (A: overflow protection, B: dry run protection).
Wiring should be carried out according to the idle cur-
rent principle.
Check operating voltage
Remove the electronics module. Check the resistance
between the marked plug connections. See the follow-
ing instructions.
Push the mode switch (A/B) on the controller. If the
controller then changes the mode, the probe may be
mechanically damaged. Should the switching func-
tion in the correct mode still be faulty, return the probe
for repair.
Check if there is buildup on the probe, and if so, re-
move it.
Check if the probe is covered by buildup on the nozzle.
Mount the instrument at a location in the vessel where
e.g. no mounds can form.
Exchange the instrument or send it in for repair
2 1 3
VEGACAP 65 • Two-wire