VEGA VEGABAR 81 4 … 20 mA_HART - Operating Instructions - Manual (Page 58)

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9 Diagnosis, asset management and service
VEGABAR 81 • 4 … 20 mA/HART
45018-EN-131010
Error Cause Rectification
4 … 20 mA signal
missing
– Electrical con-
nection faulty
– Check connection according to
chapter "Connection steps" and
if necessary, correct according to
chapter "Wiring plan"
– Voltage supply
missing
– Check cables for breaks; repair if
necessary
– Operating volt-
age too low or
load resistance
too high
– Check, adapt if necessary
Current sig-
nal greater than
22 mA or less
than 3.6 mA
– Electronics
module in the
sensor defec-
tive
– Exchange the instrument or send it
in for repair
Depending on the reason for the fault and the measures taken, the
steps described in chapter "Setup" must be carried out again or must
be checked for plausibility and completeness.
Should these measures not be successful, please call in urgent cases
the VEGA service hotline under the phone no. +49 1805 858550.
The hotline is also available outside normal working hours, seven
days a week around the clock.
Since we offer this service worldwide, the support is provided in
English. The service itself is free of charge, the only costs involved are
the normal call charges.
9.5 Exchanging the electronics module
In case of a defect, the user can replace the electronics module with
another one of identical type.
In Ex applications, only instruments and electronics modules with ap-
propriate Ex approval may be used.
If there is no electronics module available on site, one can be ordered
from the agency serving you.
Ordering and exchange are possible with or without sensor serial
number. The electronics module with serial number includes order-
specific data such as factory setting, seal material etc. These are not
included in the electronics module without serial number.
The serial number is stated on the type label of VEGABAR 81 or on
the delivery note.
You can find detailed information on the electronics exchange in the
booklet "Operating instructions for electronics module VEGABAR
series 80".
9.6 Exchange process assembly with version
IP 68 (25 bar)
With version IP 68 (25 bar), the user can exchange the process as-
sembly on site. Connection cable and external housing can be kept.
Reaction after fault recti-
fication
24 hour service hotline