Emerson Micro Motion 9739 MVD

Measurementsupport
2.Ensurethatthecalculatedmeterfactorisbetween0.8and1.2,inclusive.Ifthemeterfactoris
outsidetheselimits,contactMicroMotionCustomerService.
3.Congurethemeterfactorinthetransmitter.
•Tosetthemeterfactorusingthedisplay:OFF-LINEMAINT→CONFG→UNITS→MTRF
•TosetthemeterfactorusingProLinkII:ProLink→Conguration→Flow
•TosetthemeterfactorusingtheFieldCommunicator:
−Congure→ManualSetup→Measurements→Flow
−Congure→ManualSetup→Measurements→Density
tExample:Calculatingthemeterfactorformassflow
Theowmeterisinstalledandvalidatedforthersttime.Themassowmeasurementfromthe
transmitteris250.27lb;themassowmeasurementfromthereferencedeviceis250lb.Amassow
meterfactorisdeterminedasfollows:
Therstmeterfactorformassowis0.9989.
Oneyearlater,theowmeterisvalidatedagain.Theowmetermassmeasurementis250.07lb;the
referencedevicemeasurementis250.25lb.Anewmassowmeterfactorisdeterminedasfollows:
Thenewmeterfactorformassowis0.9996.
9.2.1Alternatemethodforcalculatingthemeterfactorforvolume
flow
Thealternatemethodforcalculatingthemeterfactorforvolumeowisusedtoavoidthedifcultiesthat
maybeassociatedwiththestandardmethod.
Thisalternatemethodisbasedonthefactthatvolumeisinverselyproportionaltodensity.Itprovides
partialcorrectionofthevolumeowmeasurementbyadjustingfortheportionofthetotaloffsetthatis
causedbythedensitymeasurementoffset.Usethismethodonlywhenavolumeowreferenceisnot
available,butadensityreferenceisavailable.
Procedure
1.Calculatethemeterfactorfordensity,usingthestandardmethod(seeSection9.2).
2.Calculatethemeterfactorforvolumeowfromthemeterfactorfordensity:
ConfigurationandUseManual
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