VEGA VEGABAR 75 4 … 20 mA_HART - Manual (Page 25)

8 M aintenance and fault rectification
8 .1 Maintenance
W
hen used as directed in normal operation, VEGABAR 75 is
completely maintenance free.
8 .2 Fault clearance
T
he operator of the system is responsible for taken suitable
measures to remove interferences.
VEGABAR 75 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
S
upply
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.
F
urther 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, if these measures are not 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.
S
ince 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.
C onnect a handheld multimeter in the suitable measuring
range according to the wiring plan.
? 4 … 20 mA signal not stable
l
L
evel fluctuations
à Adjust integration time via PACTware™
l
no atmospheric pressure compensation
à Check the capillaries and cut them clean
Reaction in case of failures
Causes of malfunction
Fault rectification
24 hour service hotline
Checking the 4 … 20 mA sig-
nal
VEGABAR 75 - 4 … 20 mA/HART 25
M aintenance and fault rectification
28433
-
EN
-070718