VEGA VEGACAL 65 4 … 20 mA_HART - two-wire - Manual (Page 36)

36
8 Maintenance and fault rectification
VEGACAL 65 • 4 … 20 mA/HART - two-wire
30033-EN-130917
Error Cause Rectification
Current sig-
nal greater than
22 mA or less
than 3.6 mA
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 mod-
ule defective
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. 25: Check the resistance in the probe
1 Shielding
2 Probe
3 Ground potential
In Ex applications, the regulations for the wiring of intrinsically safe
circuits must be observed.
Error Cause Rectification
E013 no measured val-
ue available
– Short-circuit due to bridging by con-
ductive buildup between process
fitting and electrode
– Remove buildup - if necessary,
mount a protective tube
Shortcircuit in the
probe, e.g. be-
cause of moisture
in the housing
– Remove the electronics module out
of the probe and check the resistor
between the two marked plug con-
nections according to the figure in
paragraph "Check the resistance in
the probe".
– There should be no contact
between any of the connections
(high resistance)
– If there is still a connection -
exchange the instrument or return
it for repair
Check the resistance in
the probe
Error messages via the
display and adjustment
module