transactions in measurement and control

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1、TABLEOFCONTENTSVOLUME4ÑFLOW&LEVELMEASUREMENTSectionTopicsCoveredPageTurbulent Laminar Velocity Velocity orFlow Flow ¥TheFlowPioneersProfileProfileEAFlowMeasurementOrientation¥FlowSensorSelectionD108VE¥Accuracyvs.RepeatabilityMagnetic CoilFigure1-3:Faraday'sLawistheBasi

2、softheMagneticFlowmeter¥PrimaryElementOptionsWedgeFlow ElementHL2DifferentialPressureFlowmeters¥PitotTubesD16H¥VariableAreaFlowmetersA)SegmentalWedgeB)V-ConeFigure2-8:ProprietaryElementsForDifficultFluids1stDetectorFlowTube2ndDetector¥PositiveDisplacementFlowmeters3Mec

3、hanicalFlowmeters¥TurbineFlowmetersFlow34Displacer¥OtherRotaryFlowmetersCalibrated VolumeFigure3-7:1.00 K=1Asymptote ¥MagneticFlowmeters0.95 ForFlatProfile0.90 K4ElectronicFlowmeters¥VortexFlowmeters0.85 46¥UltrasonicFlowmeters0.80 0.75 K=0.75ForLaminarFlow0.701101001,

4、000104105106107ReFigure4-6:Support MassFlowtube (Typical)EnclosureMassTubeEnclosureFlangesFlow SupportPipe/FlowtubeJunctionDirection ¥CoriolisMassFlowmetersArrowNOTE: DistanceBetween Pipe/Flowtube Junctionand Flow Support NOTE:DistanceBetween MustNot Pipe/FlowtubeJunct

5、ionand 5MassFlowmeters¥ThermalMassFlowmetersDirectionArrowExceed15Inches SupportMustNot 58A)B)Exceed15Inches ¥Hot-WireAnemometers'U'Rest'V'Rest'V'Bolt InvertedPipe 'V'BlockClamp C)ClampHangerClamp(CanBeInverted)Figure5-5:04Volume4TRANSACTIONSREFERENCESECTIONSEditorial0

6、6106InformationResourcesAboutOMEGA07110GlossaryVOLUME4ÑFLOW&LEVELMEASUREMENTSectionTopicsCoveredPageLevel%100¥LevelSensorSelectionVerticalSphere6ALevelMeasurementOrientation¥Boiling&CryogenicFluids5072Horizontal¥Sludge,Foam,&MoltenMetalsCylindrical050100Volume%Figure6-

7、3:BimetalicNozzle&FlapperPneumaticTemperatureRangeRelayCompensatorLiquidSpring¥Dry&WetLegDesignsFilFeedbackBelowsAirSupplyOutput7Pressure/DensityLevelInstrumentation¥BubblerTubesFulcrum&Seal76ForceBarLowPresureHighPresure¥Floats&DisplacersSideSideHighPresureLowPresureL

8、iquidFiledSideSideDiaphragmCapsuleA)B)Figure7-3:Level#1Kv#2KAC=DD--KlC=Capacitance¥TheoryofOperation---K=DieletricCon