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9 Diagnostics and servicing
MINITRAC 31 • Foundation Fieldbus
41782-EN-211203
Error Cause Rectication
Output signal not stable Leveluctuations Set damping appropriate to the instrument via
the display and adjustment module or PACT-
ware/DTM
Output signal missing Electrical connection faulty Check connection according to chapter "
Connection steps" and if necessary, correct ac-
cording to chapter " Wiring plan"
Voltagesupplymissing Check cables for breaks; repair if necessary
Operatingvoltagetoolow Check, adapt if necessary
Thefollowingtabledescribespossiblefaultsthatmaynotgeneratean
error message:
Error Cause Rectication
The instrument signals cov-
eredwithoutbeingcoveredby
the measured medium
The instrument signals uncov-
eredwhilecoveredwiththe
measured medium
Voltagesupplymissing Check cables for breaks; repair if necessary
Operatingvoltagetoolow 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 Changetheswitchingbehaviourofthesensors
under"Diagnosis/Simulation".Iftheinstrument
doesnotswitchover,senditinforrepair.
Buildupontheinnerwallof
the vessel
Remove buildup
Check the Delta I value.
Improvetheswitchingthreshold-carryouta
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
theVEGAservicehotlineunderthephoneno.+49 1805 858550.
Thehotlineisalsoavailableoutsidenormalworkinghours,seven
daysaweekaroundtheclock.
Sinceweoerthisserviceworldwide,thesupportisprovidedin
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.
InExapplications,onlyinstrumentsandelectronicsmoduleswithap-
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-
icsmodulesareadaptedtotherespectivesensoranddierinsignal
output or voltage supply.
Check output signal
(level detection)
Reaction after fault recti-
cation
24 hour service hotline