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10 Diagnostics and servicing
VEGABAR 29 • Two-wire 4 … 20 mA
57087-EN-210301
10.3 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
The LED illuminated ring on the device (see chapter "
Configuration
")
indicates the status of the device. This enables simple on-site diagno-
sis without the need for tools.
Note:
The LED illuminated ring is not available for device versions with
continuous stainless steel housing.
Colour
2)
Permanent light
Flashing
Green
voltage supply on, operation without failure Message "
Maintenance required
" is dis-
played
Yellow
voltage supply on, operation without failure -
Red
voltage supply on, operation with failure
Message acc. to to NE 107 "
Function
check
", "
Out of specification
" or "
Simula-
tion state
" is displayed
10.4 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 required
and explained by pictographs:
4 … 20 mA signal
LED illuminated ring
Status messages
2)
Adjustable via VEGA Tools app or PACTware/DTM