VEGA VEGATOR 631 Ex - Manual (Page 26)

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
A maximum of reliability is ensured. Nevertheless, faults 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 measure to be taken is to check the input and output signals.
The procedure is described as follows. In many cases the causes can
be determined this way and faults can be easily 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 red failure control lamp (LED) of the signal conditioning
instrument lights
l Sensor not connected correctly
à Check the electrical connection by means of the wiring plans
l Line break
à Check the electrical connection cables from the probe to the
signal conditioning instrument
l Resistance for line monitoring missing
à Check if a 220 kΩ resistor is mounted in the sensor housing
between terminals 1 and 2 or if the respective bridge to the
fault message adjustment on the signal conditioning instru-
ment is present.
à You can find further information in chapter "Set up - Failure
adjustment, bridge".
In Ex systems, make sure that the Ex protection is not influenced by the
measuring instruments used.
Causes of malfunction
Fault rectification
24 hour service hotline
Failure
26 VEGATOR 631 Ex • Signal conditioning instrument
7 Maintenance and fault rectification
23440
-EN
-090130