VEGA VEGABAR 67 4 … 20 mA_HART - climate compensated - Manual (Page 48)

48
8 Maintenance and fault rectification
VEGABAR 67 • 4 ... 20 mA/HART - climate compensated
39444-EN-130321
8 Maintenance and fault rectification
8.1 Maintain
If the instrument is used properly, no special maintenance is required
in normal operation.
In 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.
If 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.
Caution:
On instruments with a chemical seal, never clean the separating
diaphragm mechanically with hard objects, such as tools! This can
damage the diaphragm and lead to filling oil leaks.
8.2 Rectify faults
VEGABAR 67 offers maximum reliability. Nevertheless, faults can oc-
cur during operation. These may be caused by the following, e.g.:
•
Sensor
•
Process
•
Voltage supply
•
Signal processing
The first measures to be taken are to check the output signals as well
as to evaluate the error messages via the display 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.
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.
Connect a handheld multimeter in the suitable measuring range ac-
cording to the wiring plan.
Maintenance
Cleaning
Failure reasons
Fault rectification
24 hour service hotline
Check the 4 … 20 mA
signal