Emerson Micro Motion 9739 MVD

Chapter9
Measurementsupport
Topicscoveredinthischapter:
♦Optionsformeasurementsupport
♦Validatethemeter
♦Performa(standard)D1andD2densitycalibration
♦PerformaD3andD4densitycalibration(T-Seriessensorsonly)
♦Performtemperaturecalibration
9.1Optionsformeasurementsupport
MicroMotionprovidesseveralmeasurementsupportprocedurestohelpyouevaluateandmaintain
yourowmeter'saccuracy.
Thefollowingmethodsareavailable:
•Metervalidationcomparesowmetermeasurementsreportedbythetransmittertoanexternal
measurementstandard.Metervalidationrequiresonedatapoint.
•Calibrationestablishestherelationshipbetweenaprocessvariableandthesignalproducedat
thesensor.Youcancalibratetheowmeterforzero,density,andtemperature.Densityand
temperaturecalibrationrequiretwodatapoints(lowandhigh)andanexternalmeasurementfor
each.
Tip
MicroMotionrecommendsusingmetervalidationandmeterfactors,ratherthancalibration,toprovethe
meteragainstaregulatorystandardortocorrectmeasurementerror.
9.2Validatethemeter
Metervalidationcomparesowmetermeasurementsreportedbythetransmittertoanexternal
measurementstandard.Ifthetransmittermassow,volumeow,ordensitymeasurementissignicantly
differentfromtheexternalmeasurementstandard,youmaywanttoadjustthecorrespondingmeter
factor.Theowmeter’sactualmeasurementismultipliedbythemeterfactor,andtheresultingvalueis
reportedandusedinfurtherprocessing.
ConfigurationandUseManual
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