9 Maintenance and fault rectification
9.1 Maintenance
When used as directed in normal operation, VEGAMET 391 is
completely maintenance free.
9.2 Rectify malfunctions
The operator of the system is responsible for taking suitable measures
to rectify malfunctions.
A maximum of reliability is ensured. Nevertheless, f aults can occur
during operation. These may be caused by the following, e.g.:
l Measured value from sensor not correct
l Power supply
l Interference on the cables
The first measures to be taken are to check the input and output signal
as well as to evaluate the error messages via the display. The
procedure is described below. Further comprehensive diagnostics can
be carried out on a PC with PACTware and the suitable DTM. In many
cases, the causes can be determined in this way and faults rectified.
However, should these measures not be successful, call the VEGA
service hotline in urgent cases under the phone no. +49 1805 858550.
The hotline is available to you 7 days a week round-the-clock. Since
we offer this service world-wide, the support is only available in the
English language. The service is free of charge, only the standard
telephone costs will be charged.
The signal conditioning instrument and the connected sensors are
permanently monitored during operation and the values entered during
parameter adjustment are checked for plausibility. If irregularities
occur or in case of incorrect parameter adjustment, a fault signal is
triggered. In case of an instrument defect or line break/shortcircuit, a
fault signal is also triggered.
The fault indication lights in case of failure and the current output as
well as the relays react according to the configured fault mode. If relay
6 was configured as fail safe relay, it will deenergize. In addition, one of
the following error messages is outputted on the display.
? E003
l CRC error (error with self-check)
à Carry out a reset
Reaction when malfunc-
tions occur
Causes of malfunction
Fault rectification
24 hour service hotline
Fault message
VEGAMET 391 • 4 … 20 mA/HART signal conditioning instrument 51
9 Maintenance and fault rectification
36032-EN-091116
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