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7 Maintenance and fault rectification
Reaction when malfunc-
tions occur
Causes of faults
Fault rectification
24 hour service hotline
Checking the 4 ... 20 mA
signal
14
7 Maintenance and fault rectification
7.1 Maintenance
If the instrument is used properly, no special maintenance is required
in normal operation.
7.2 Fault rectification
The operator of the system is responsible for taking suitable measures
to rectify faults.
VEGABAR 12 offers maximum reliability. Nevertheless, faults can
occur during operation. These may be caused by the following, e.g.:
Sensor
l
Process
l
Voltage supply
l
Signal processing
l
The first measure to be taken is to check the output signal. In many
cases, the causes can be determined this way and the faults rectified.
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.
4 ... 20 mA signal not stable
?
no atmospheric pressure compensation
l
à Check pressure compensation
?
No 4 ... 20 mA signal
Connection to voltage supply wrong
l
à Check connection according to chapter "Connection steps"
and if necessary, correct according to chapter "Wiring plan"
No operating voltage
l
à Check cables for breaks; repair if necessary
Operating voltage too low or load resistance too high
l
à Check, adapt if necessary
VEGABAR 12
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