VEGA VEGABAR 61 4 … 20 mA_HART - Manual (Page 50)

8 Maintenance and fault rectification
8.1 Maintain
W
hen used in the correct way, no special maintenance is required in
normal operation.
I n some applications, product buildup on the sensor 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 transmitter. Make sure that the materials are
resistant against the cleanig, see resistance list under "Services" on
"
www.vega.com". The application variety of VEGABAR 61 requires
special cleaning instructions for each application. Please ask the
VEGA
agency serving you.
8.2 Remove interferences
T he 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.:
l S ensor
l P rocess
l P ower 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
in this way and faults can be rectified.
H owever, should these measures not be successful, call the VEGA
service hotline in urgent cases 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
Causes of malfunction
Fault rectification
24 hour service hotline
Checking the 4 … 20 mA
signal
50 VEGABAR 61 • 4 … 20 mA/HART
8 M aintenance and fault rectification
27519
-EN
-081209