Emerson Micro Motion 9739 MVD

Troubleshooting
Procedure
VerifythecongurationofFrequencyOutputMode.
10.20CheckFrequencyOutputMaximumPulseWidthandFrequency
OutputScalingMethod
Procedure
1.VerifythecongurationofFrequencyOutputScalingMethod.
Thescalingmethodshouldbesetasrequiredbyyourfrequencyreceivingdevice.Ifyouchange
thescalingmethod,youmayneedtocongureadditionalfrequencyoutputparameters.
2.VerifythecongurationofFrequencyOutputMaximumPulseWidth.
Formostapplications,thedefaultfrequencypulsewidthisappropriate.Thiscorrespondstoa
50%dutycycle.
10.21CheckFrequencyOutputFaultAction
Procedure
1.Checkthestatusalarmsforfaultconditions.
Ifnofaultconditionsarepresent,thesourceoftheproblemissomethingotherthanthefrequency
outputfaultconguration.
2.CheckthecongurationofFrequencyOutputFaultAction.
10.22CheckFlowDirection
Theinteractionoftheowdirectionparameter,owvaluesreportedbythetransmitter,andowtotals
reportedbythetransmitteriscomplex.Forthesimplestoperation,actualprocessowshouldmatchthe
owarrowprintedonthesideofthesensorcase.
Procedure
1.Verifytheactualdirectionofprocessowthroughthesensor.
2.VerifythecongurationofFlowDirection.
10.23Checkcutoffs
Thereareseparatecutoffparametersformassow,volumeow(includinggasstandardvolumeow),
anddensity.Furthermore,thereisanindependentcutoffforeachmAoutput.Theinteractionbetween
cutoffssometimesproduceunexpectedresults.
Procedure
Verifythecongurationofthecutoffs.
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MicroMotion9739MVDTransmitters