Emerson Micro Motion 9739 MVD

Configureprocessmeasurement
EffectofFlowDampingonvolumemeasurement
FlowDampingeffectsvolumemeasurementforbothliquidvolumeandgasstandardvolume.Volumedata
iscalculatedfromthedampedmassowdataratherthanthemeasuredowvalue.
InteractionbetweenFlowDampingandAddedDamping
FlowDampingcontrolstherateofchangeinowprocessvariables.AddedDampingcontrolstherateof
changereportedviathemAoutput.IfmAOutputProcessVariableissettoMassFlowRate,andbothFlow
DampingandAddedDampingaresettonon-zerovalues,owdampingisappliedrst,andtheadded
dampingcalculationisappliedtotheresultoftherstcalculation.
5.2.3ConfigureMassFlowCutoff
DisplayNotavailable
ProLinkII
ProLink→Conguration→Flow→MassFlowCutoff
FieldCommunicatorCongure→ManualSetup→Measurements→Flow→MassFlowCutoff
MassFlowCutoffspeciesthelowestmassowratethatwillreportedasmeasured.Allmassowrates
belowthiscutoffwillbereportedas0.
Procedure
SetMassFlowCutofftothedesiredvalue.
ThedefaultvalueforMassFlowCutoffis0.0g/s.Therecommendedsettingis0.05%ofthesensor's
ratedmaximumowrate.
EffectofMassFlowCutoffonvolumemeasurement
MassFlowCutoffdoesnotaffectvolumemeasurement.Volumedataiscalculatedfromtheactualmass
dataratherthanthereportedvalue.
InteractionbetweenMassFlowCutoffandAOCutoff
MassFlowCutoffaffectsallreportedvaluesandvaluesusedinothertransmitterbehavior(e.g.,events
denedonmassow).
AOCutoffaffectsonlymassowvaluesreportedviathemAoutput.
tExample:Cutoffinteraction
Conguration:
•mAOutputProcessVariablefortheprimarymAoutput:MassFlowRate
•FrequencyOutputProcessVariable:MassFlowRate
•AOCutofffortheprimarymAoutput:10grams/second
•MassFlowCutoff:15grams/second
Result:Ifthemassowratedropsbelow15grams/second,massowwillbereportedas0,and0
willbeusedinallinternalprocessing.
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MicroMotion9739MVDTransmitters