VEGA VEGAWELL S 51 - Manual (Page 20)

5 M
aintenance and fault
rectification
5 .1
Maintenance
If the instrument is used properly, no special
maintenance is required in normal operation.
5 .2
Fault rectification
Failure reasons
VEGAWELL S 51 offers maximum reliability.
Nevertheless, faults can occur during operation.
These may be caused by the following, e.g.:
l
Sensor
l
Process
l
Voltage supply
l
Signal processing
Fault rectification
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.
24 hour service hotline
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.
Checking the 4 … 20 mA signal
Connect a handheld multimeter in the suitable
measuring range according to the wiring plan.
?
4 … 20 mA signal not stable
l no atmospheric pressure compensation
à Check the capillaries and cut them clean
à Check pressure compensation in
VEGABOX 02, if necessary clean filter
element
?
4 … 20 mA signal missing
l Wrong connection to power supply
à Check connection according to chapter
"C
onnection steps" and if necessary,
correct according to chapter "Wiring plan"
l No power supply
à Check cables for breaks; repair if neces-
sary
l Supply voltage too low or load resistance
too high
à Check, adapt if necessary
In Ex applications, the regulations for the
wiring of intrinsically safe circuits must be
observed.
5 .3
Shorten suspension cable
Shorten the suspension cable individually. Proceed
as follows:
1 Remove the filter adapter from the transparent
capillary line
2 Cut the suspension cable with an edge cutter
to the requested length
Caution:
Do not squeeze the capillary cable, this will
influence the pressure compensation. If
necessary, rework with a sharp knife.
3 Remove approx. 10 cm of the cable mantle,
strip off approx. 1 cm of the wire ends
Insert the filter adapter
The work steps are finished.
5 .4
Instrument repair
If a repair is necessary, please proceed as follows:
You can download a return form (23 KB) from our
Internet homepage www.vega.com under: "Down-
loads - Forms and certificates - Repair form".
By doing this you help us carry out the repair
quickly and without having to call back for needed
information.
20 VEGAWELL S 51
Maintenance and fault rectification
32946
-01
-101123