23
7 Maintenance and fault rectification
VEGACAL 67 • For connection to a controller
31761-EN-200317
Error
Cause
Rectification
Current signal >22 mA
Short-circuit due to bridg-
ing by conductive buildup
between process fitting
and electrode
Remove buildup - if necessary, mount a protective tube
Shortcircuit in the probe,
e.g. because of moisture in
the housing
Remove the electronics module. Check the resistance
between the marked plug connections. See the follow-
ing instructions.
Electronics module de-
fective
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
1
2
3
Fig. 12: Check the resistance in the probe
1 Shielding
2 Measuring probe
3 Ground potential
Depending on the reason for the fault and the measures taken, the
steps described in chapter "
Set up
" may have to be carried out again.
7.3 Exchanging the electronics module
If the electronics module is defective, it can be replaced by the user.
In Ex applications, only instruments and electronics modules with ap-
propriate Ex approval may be used.
If there is no electronics module available on site, one can be ordered
from the VEGA agency serving you.
The electronics modules are adapted to the respective sensor. You
can find a suitable electronics module in the following overview.
•
CL-E60
Z
X (without approvals)
Check the resistance in
the probe
Reaction after fault recti-
fication
Assignment
Summary of Contents for VEGACAL 67
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