VEGA VEGAFLEX 66 (-200…+400°C) 4 … 20 mA_HART four-wire - Manual (Page 38)

8 Maintenance and fault rectification
8 .1 Maintenance
W hen the instrument is used properly, no special maintenance is
required in normal operation.
8 .2 Rectify malfunctions
T he operator of the system is responsible for taking suitable measures
to remove interferences.
VEGAFLEX 66 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:
Error Cause Removal
4 … 20 mA signal
not stable
L evel fluctuations Set damping via the indicating and
adjustment module
4 … 20 mA signal
missing
E lectrical con-
nection faulty
C heck connection according to chap-
ter " Connection steps " and if ne-
cessary, correct according to chapter
"
Wiring plan "
Reaction when malfunc-
tions occur
Causes of malfunction
Fault rectification
24 hour service hotline
Checking the 4 … 20 mA
signal
38 VEGAFLEX 66 • 4 … 20 mA/HART four-wire
8 M aintenance and fault rectification
34174
-EN
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