Emerson Micro Motion 9739 MVD

Troubleshooting
Table10-6Milliampoutputproblemsandrecommendedactions continued
ProblemPossiblecausesRecommendedactions
Consistently
incorrectmA
measurement
•Outputnottrimmedcorrectly
•Incorrectowmeasurementunit
congured
•Incorrectprocessvariablecongured
•LRVandURVarenotsetcorrectly
•CheckthemAoutputtrim.SeeSection
10.16.
•Verifythatthemeasurementunits
areconguredcorrectlyforyour
application.
•Verifytheprocessvariableassigned
tothemAoutput.
•CheckthesettingsofUpperRangeValue
andLowerRangeValue.SeeSection
10.17.
mAoutputcorrect
atlowercurrent,but
incorrectathigher
current
•mAloopresistancemaybesettoo
high
•VerifythatthemAoutputload
resistanceisbelowmaximum
supportedload(seetheinstallation
manualforyourtransmitter).
10.7Frequencyoutputproblems
Table10-7Frequencyoutputproblemsandrecommendedactions
ProblemPossiblecausesRecommendedactions
Nofrequencyoutput
•Processconditionbelowcutoff
•Faultconditioniffaultindicatorisset
tointernalzeroordownscale
•Slugow
•Flowinreversedirectionfrom
conguredowdirectionparameter
•Badfrequencyreceivingdevice
•Outputlevelnotcompatiblewith
receivingdevice
•Badoutputcircuit
•Incorrectinternal/externalpower
conguration
•Incorrectpulsewidthconguration
•Outputnotpowered
•Wiringproblem
•Verifythattheprocessconditionsare
belowthelow-owcutoff.Recongure
thelow-owcutoffifnecessary.
•ChecktheFaultActionsettings.See
Section10.18.
•Verifythatthetotalizersarenotstopped.
Astoppedtotalizerwillcausethe
frequencyoutputtobelocked.
•Checkforslugow.SeeSection10.24.
•Checkowdirection.SeeSection10.22.
•Verifythatthereceivingdevice,andthe
wiringbetweenthetransmitterandthe
receivingdevice
•Verifywhichwiringterminalsare
conguredforfrequencyoutput.
•Performalooptest.
•Verifythatthepowercongurationforthe
frequencyoutput(internalvs.external).
•Checkthepulsewidth.SeeSection
10.20.
ConfigurationandUseManual
189