VEGA VEGAWELL 52 4 … 20 mA_HART Pt 100 - Manual (Page 26)

8 Maintenance and fault rectification
8 .1 Maintenance
I
f the instrument is used properly, no special maintenance is required
in normal operation.
I n some applications, product buildup on the diaphragm can influence
the measuring result. Depending on the sensor and application, take
precautions to ensure that heavy buildup, and especially a hardening
thereof, is avoided.
I f necessary, clean the diaphragm. Make sure that the materials are
resistant to the cleaning process, see resistance list under "Services"
on "www.vega.com". The wide variety of applications of isolating
diaphragms makes special cleaning instructions necessary for each
application. Please ask the VEGA agency serving you.
8 .2 Remove interferences
T he operator of the system is responsible for taking suitable measures
to rectify faults.
VEGAWELL 52 offers maximum reliability. Nevertheless, faults can
occur during operation. These may be caused by the following, e.g.:
l S ensor
l P rocess
l V oltage supply
l S ignal processing
T he first measures to be taken are to check the output signals as well
as to evaluate the error messages via the indicating 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.
S hould these measures not be successful, please call in urgent cases
the VEGA service hotline under the phone no. +49 1805 858550.
T he 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
E
nglish language. The service is free of charge, only the standard
telephone costs will be charged.
C onnect a handheld multimeter in the suitable measuring range
according to the wiring plan.
Maintenance
Cleaning
Reaction when malfunc-
tions occur
Failure reasons
Fault rectification
24 hour service hotline
Checking the 4 … 20 mA
signal
26 VEGAWELL 52 • 4 … 20 mA/HART Pt
8 M aintenance and fault rectification
35402
-EN
-111021