VEGA VEGADIF 65 4 … 20 mA_HART - Manual (Page 71)

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9 Maintenance and fault rectification
VEGADIF 65 • 4 … 20 mA/HART
36128-EN-130417
9 Maintenance and fault rectification
9.1 Maintenance
If the instrument is used properly, no special maintenance is required
in normal operation.
In some applications, product buildup on the separating diaphragms
can influence the measuring result. Depending on the sensor and
application, take precautions to ensure that heavy buildup, and espe-
cially a hardening thereof, is avoided.
9.2 Rectify faults
The operator of the system is responsible for taking suitable meas-
ures to rectify faults.
VEGADIF 65 offers maximum reliability. Nevertheless, faults can oc-
cur during operation. These may be caused by the following, e.g.:
•
Sensor
•
Process
•
Voltage supply
•
Signal processing
The first measures to be taken are to check the output signals as well
as to evaluate the error messages via the display and adjustment
module. The procedure is described below. Further comprehensive
diagnostics can be carried out on a PC with the software PACTware
and the suitable DTM. In many cases, the causes can be determined
and the faults rectified this way.
Should these measures not be successful, please call in urgent cases
the VEGA service hotline 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.
Connect a handheld multimeter in the suitable measuring range ac-
cording to the wiring plan.
Error code Cause Rectification
4 … 20 mA
signal not
stable
Level fluctuations – Set the integration time via the
display and adjustment module or
PACTware
Maintenance
Reaction when malfunc-
tions occur
Failure reasons
Fault rectification
24 hour service hotline
Check the 4 … 20 mA
signal