Maintenance - Vega VEGABAR 17 Operating Instructions Manual

Reaction when malfunc-
tions occur
Causes of malfunction
Fault rectification
24 hour service hotline
Checking the 4 ... 20 mA
signal
Reaction after fault rec-
tification
VEGABAR 17
7 Maintenance and fault rectification

7.1 Maintenance

When used in the correct way, no special maintenance is required in
normal operation.
7.2 Remove interferences
The operator of the system is responsible for taken suitable measures
to remove interferences.
A maximum of reliability is ensured. 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.
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.
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 voltage supply
l
à Check cables for breaks; repair if necessary
supply voltage too low or load resistance too high
l
à Check, adapt if necessary
Steady output signal with pressure change
?
electronics module or measuring cell defective
l
à Exchange instrument or return instrument for repair
In Ex applications, the regulations for the wiring of intrinsically safe
circuits must be observed.
Depending on the failure reason and measures taken, the steps
described in chapter "Set up" must be carried out again, if necessary.
7 Maintenance and fault rectification
21