VEGA VEGAFLEX 66 (-110…+400°C) 4 … 20 mA_HART - four-wire - Manual (Page 38)

8 Maintenance and fault rectification
8.1 Maintenance
W hen used in the correct way, no special maintenance is
required in normal operation.
8.2 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 Set integration time via the indicating/adjustment
module
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
32763
-EN
-080826