44
11 Diagnostics and servicing
VEGAPULS 31 • Two-wire 4 … 20 mA/HART
57820-EN-191014
Since we offer this service worldwide, the support is provided in
English. The service itself is free of charge, the only costs involved are
the normal call charges.
11.3 Diagnosis, fault messages
Connect a multimeter in the suitable measuring range according to
the wiring plan. The following table describes possible errors in the
current signal and helps to eliminate them:
Error
Cause
Rectification
4 … 20 mA signal not stable Fluctuating measured value
Set damping
4 … 20 mA signal missing
Electrical connection faulty
Check connection, correct, if necessary
Voltage supply missing
Check cables for breaks; repair if nec-
essary
Operating voltage too low, load resist-
ance too high
Check, adapt if necessary
Current signal greater than
22 mA, less than 3.6 mA
Sensor electronics defective
Replace device or send in for repair de-
pending on device version
11.4 Status messages according to NE 107
The instrument features self-monitoring and diagnostics according
to NE 107 and VDI/VDE 2650. In addition to the status messages in
the following tables there are more detailed error messages available
under the menu item "
Diagnostics
" via the respective adjustment
module.
The status messages are divided into the following categories:
•
Failure
•
Function check
•
Out of specification
•
Maintenance requirement
and explained by pictographs:
4
1
2
3
Fig. 30: Pictographs of the status messages
1 Failure - red
2 Out of specification - yellow
3 Function check - orange
4 Maintenance - blue
Failure:
Due to a malfunction in the instrument, a fault message is
output.
This status message is always active. It cannot be deactivated by the
user.
4 … 20 mA signal
Status messages
