VEGA VEGAWELL 72 4 … 20 mA_HART PT 100 - Manual (Page 26)

7 M aintenance and fault recti fication
7 .1 Maintenance
W hen used in the correct way, no special maintenance is
required in normal operation.
7 .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
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.
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, 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.
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
à Check the pressure compensation in the housing and
clean the filter element, if necessary
Reaction when malfunc-
tions occur
Causes of malfunction
Fault rectification
24 hour service hotline
Checking the 4 … 20 mA
signal
26 VEGAWELL 72 • 4 … 20 mA/HART PT
7 M aintenance and fault rectification
34360
-EN
-080806