VEGA VEGAPULS 67 (≥ 2.0.0 - ≤ 3.8) 4 … 20 mA_HART two-wire - Manual (Page 46)

8 Maintenance and fault rectification
8 .1 Maintenance, cleaning
W hen the instrument is used properly, no special maintenance is
required in normal operation.
I n some applications, buildup on the antenna system can influence the
measuring result. Depending on the sensor and application, make
arrangements to avoid strong pollution of the antenna system. If
necessary, clean the antenna system in certain intervals.
8 .2 Rectify malfunctions
T he operator of the system is responsible for taking suitable measures
to remove interferences.
VEGAPULS 67 offers a maximum of reliability is ensured. Never-
theless, 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
this way and faults 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 handmultimeter in the suitable measuring range according
to the wiring plan. The following table describes possible errors in the
current signal and helps to remove them:
Reaction when malfunc-
tions occur
Causes of malfunction
Fault rectification
24 hour service hotline
Checking the 4 … 20 mA
signal
46 VEGAPULS 67 • 4 … 20 mA/HART two-wire
8 M aintenance and fault rectification
32938
-EN
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