User guide

67
9 Diagnostics and service
MINITRAC 31 • Foundation Fieldbus
41782-EN-131119
Thefollowingtabledescribespossiblefaultsthatmaynotgeneratean
error message:
Error Cause Rectication
The instrument signals cov-
eredwithoutcoveringwiththe
medium
The instrument signals cov-
eredwithcoveringwiththe
medium
Voltagesupplymissing Check cables for breaks; repair if necessary
Operatingvoltagetoolow Check, adapt if necessary
Electrical connection faulty Check connection according to chapter
"Connection steps" and if necessary, correct ac-
cording to chapter "Wiring plan"
Electronics defective Changetheswitchingbehaviourofthesensors
under "Diagnosis/Simulation". If the instrument
doesnotswitchover,senditinforrepair.
Buildupontheinnerwallof
the vessel
Remove buildup
Check the Delta I value.
Improvetheswitchingthreshold-carryouta
double point adjustment
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.[phone].
Thehotlineisalsoavailableoutsidenormalworkinghours,seven
daysaweekaroundtheclock.
Sinceweoer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.
9.4 Exchanging the electronics module
If the electronics module is defective, it can be replaced by the user.
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, the electronics
module can be ordered through the agency serving you. The electron-
icsmodulesareadaptedtotherespectivesensoranddierinsignal
output or voltage supply.
Thenewelectronicsmodulemustbeloadedwiththedefaultsettings
of the sensor. These are the options:
•
In the factory
•
Or on site by the user
In both cases, the serial number of the sensor is needed. The serial
numbers are stated on the type label of the instrument, on the inside
ofthehousingaswellasonthedeliverynote.
Whenloadingonsite,rstofalltheorderdatamustbedownloaded
from the Internet (see operating instructions manual "Electronics
module").
Check output signal
(level detection)
Reaction after fault recti-
cation
24 hour service hotline