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11 Diagnostics and servicing
VEGAPULS 21 • Two-wire 4 … 20 mA/HART
58351-EN-191014
Sinceweoerthisserviceworldwide,thesupportisprovidedin
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 Rectication
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
The LED illuminated ring on the device (see chapter "Conguration")
indicates the operating status of the device. This enables simple on-
site diagnosis without the need for tools.
Colour
3)
Permanent light Flashing
Green Operation without interference Message "Maintenance" is displayed
Yellow Operation without interference -
Red Operation with interference
Message acc. to to NE 107 "Function
check", "Outofspecication" or "Simu-
lation state" is displayed
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
•
Outofspecication
•
Maintenance requirement
and explained by pictographs:
4 … 20 mA signal
LED illuminated ring
Status messages
3)
Adjustable via VEGA Tools app or PACTware/DTM
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