TLV EF200W-C Manuel

172-65762M-00(EF200W-CVortexﬂowmeter)8February2021

EF200W-C

Vortexﬂowmeter

Allrightsreserved

EF200W-C

Tableofcontents

Aboutthisdocument

Symbols

Functionandsystemdesign

Measuringprinciple

Measuringsystem

Input

Measuredvariable

Measuringrange

Operableﬂowrange

Output

Outputsignal

Signalonalarm

Load

Lowﬂowcutoﬀ

Galvanicisolation

Protocol-speciﬁcdata

Powersupply

Terminalassignment

Supplyvoltage

Powerconsumption

Currentconsumption

Powersupplyfailure

Electricalconnection

Potentialequalization

Terminals

Cableentries

Cablespeciﬁcation

Overvoltageprotection

Performancecharacteristics

Referenceoperatingconditions

Maximummeasurederror

Repeatability

Responsetime

Inﬂuenceofambienttemperature

Installation

Mountinglocation

Orientation

Inletandoutletruns

Mountingkitfordisc(waferversion)

Lengthofconnectingcable

Mountingthetransmitterhousing

Environment

Ambienttemperaturerange

Storagetemperature

Climateclass

Degreeofprotection

Vibration-andshock-resistance

Electromagneticcompatibility(EMC)

Process

Mediumtemperaturerange

Pressure-temperatureratings

Nominalpressureofsensor

Pressureloss

Thermalinsulation

Mechanicalconstruction

DimensionsinSIunits

DimensionsinUSunits

Weight

Materials

Operability

Operatingconcept

Languages

Localoperation

Remoteoperation

Certiﬁcatesandapprovals

CEmark

RCM-ticksymbol

HARTcertiﬁcation

PressureEquipmentDirective

Experience

Otherstandardsandguidelines

Orderinginformation

Productgenerationindex

Supplementarydocumentation

Standarddocumentation

Registeredtrademarks

ProductWarranty

Service

EF200W-C

About this document

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Symbol Meaning

Directcurrent

Alternatingcurrent

Directcurrentandalternatingcurrent

Groundconnection

Agroundedterminalwhich,asfarastheoperatorisconcerned,isgroundedviaa

groundingsystem.

ProtectiveEarth(PE)

Aterminalwhichmustbeconnectedtogroundpriortoestablishinganyother

connections.

Thegroundterminalsaresituatedinsideandoutsidethedevice:

• Innergroundterminal:Connectstheprotectivearthtothemainssupply.

• Outergroundterminal:Connectsthedevicetotheplantgroundingsystem.

Symbols for certain types of information

Symbol Meaning

Permitted

Procedures,processesoractionsthatarepermitted.

Preferred

Procedures,processesoractionsthatarepreferred.

Forbidden

Procedures,processesoractionsthatareforbidden.

Tip

Indicatesadditionalinformation.

Referencetodocumentation.

AReferencetopage.

Referencetographic.

Visualinspection.

Symbols in graphics

Symbol Meaning

1,2,3,... Itemnumbers

1. , 2. , 3. ,… Seriesofsteps

A,B,C,... Views

A-A,B-B,C-C,... Sections

-Hazardousarea

Flowdirection

EF200W-C

Function and system design

Measuring principle VortexmetersworkontheprincipleoftheKarmanvortexstreet.Whenﬂuidﬂowspastabluﬀbody,

vorticesarealternatelyformedonbothsideswithoppositedirectionsofrotation.Thesevorticeseach

generatealocallowpressure.Thepressureﬂuctuationsarerecordedbythesensorandconvertedto

electricalpulses.Thevorticesdevelopveryregularlywithinthepermittedapplicationlimitsofthe

device.Therefore,thefrequencyofvortexsheddingisproportionaltothevolumeﬂow.

A0033465

Samplegraphic

Thecalibrationfactor(K-factor)isusedastheproportionalconstant:

K-Factor = Pulses

Unit Volume [m³]

Withintheapplicationlimitsofthedevice,theK-factoronlydependsonthegeometryofthedevice.

ItisforRe>20000:

• Independentoftheﬂowvelocityandtheﬂuidpropertiesviscosityanddensity

• Independentofthetypeofsubstanceundermeasurement:steam,gasorliquid

Theprimarymeasuringsignalislineartotheﬂow.Afterproduction,theK-factorisdeterminedin

thefactorybymeansofcalibration.Itisnotsubjecttolong-timedriftorzero-pointdrift.

Thedevicedoesnotcontainanymovingpartsanddoesnotrequireanymaintenance.

The capacitance sensor

Thesensorofavortexﬂowmeterhasamajorinﬂuenceontheperformance,robustnessand

reliabilityoftheentiremeasuringsystem.

TherobustDSCsensoris:

• burst-tested

• testedagainstvibrations

• testedagainstthermalshock(thermalshocksof150K/s)

Themeasuringdeviceusesthetried-and-tested,capacitancemeasuringtechnology

whichisalreadyinuseinover450000measuringpointsworldwide.Thankstoits

design,thecapacitancesensorisalsoparticularlymechanicallyresistanttotemperatureshocksand

pressureshocksinsteampipelines.

EF200W-C



Temperature measurement

Themeasuringdevicecanalsomeasurethetemperatureofthemedium.

ThetemperatureismeasuredviaPt1000temperaturesensors.Thesearelocatedinthepaddleof

theDSCsensorandarethereforeinthedirectvicinityoftheﬂuid.

A0034068

1 DSCsensor

Lifelong calibration

Experiencehasshownthatrecalibratedmeasuringdevicesdemonstrateaveryhighdegreeof

stabilitycomparedtotheiroriginalcalibration:Therecalibrationvalueswereallwithintheoriginal

measuringaccuracyspeciﬁcationsofthedevices.Thisappliestothemeasuredvolumeﬂow,the

device'sprimarymeasuredvariable.

Varioustestsandsimulationhaveshownthatoncetheradiioftheedgesonthebluﬀbodyareless

than1mm(0.04in),theresultingeﬀectdoesnothaveanegativeimpactonaccuracy.

Iftheradiioftheedgesonthebluﬀbodydonotexceed1mm(0.04in),thefollowinggeneral

statementsapply(inthecaseofnon-abrasiveandnon-corrosivemedia,suchasinmostwaterand

steamapplications):

• Themeasuringdevicedoesnotdisplayanoﬀsetinthecalibrationandtheaccuracyisstill

guaranteed.

• Alltheedgesonthebluﬀbodyhavearadiusthatistypicallysmallerinsize.Asthemeasuring

devicesarenaturallyalsocalibratedwiththeseradii,themeasuringdeviceremainswithinthe

speciﬁedaccuracyratingprovidedthattheadditionalradiusthatisproducedasaresultofwear

andteardoesnotexceed1mm(0.04in).

Consequently,itcanbesaidthattheproductlineoﬀerslifelongcalibrationifthemeasuringdeviceis

usedinnon-abrasiveandnon-corrosivemedia.

Air and industrial gases

Themeasuringdeviceenablesuserstocalculatethedensityandenergyofairandindustrialgases.

Thecalculationsarebasedontime-testedstandardcalculationmethods.Itispossibleto

automaticallycompensatefortheeﬀectofpressureandtemperatureviaanexternalorconstant

value.

Thismakesitpossibletooutputtheenergyﬂow,standardvolumeﬂowandmassﬂowofthe

followinggases:

• Singlegas

• Gasmixture

• Air

• User-speciﬁcgas

Fordetailedinformationontheparameters,seetheOperatingInstructions.→Seepage52

EF200W-C

Measuring system Thedeviceconsistsofatransmitterandasensor.

Twodeviceversionsareavailable:

• Compactversion‒transmitterandsensorformamechanicalunit.

• Remoteversion-transmitterandsensoraremountedinseparatelocations.

Transmitter

EF200-C Deviceversionsandmaterials:

• Compactorremoteversion,aluminumcoated:

Aluminum,AlSi10Mg,coated

Conﬁguration:

• Viafour-linelocaldisplaywithkeyoperationorviafour-line,

• Viaoperatingtools

A0013471

Sensor

EF200W-C Disc(waferversion):

• Nominaldiameterrange:DN15to150(½to6")

• Materials:

Measuringtubes:stainlesssteel,CF3M/1.4408

A0009922

Input

Measured variable Direct measured variables

Ordercodefor"Sensorversion;DSCsensor;measuringtube"

Description Measuredvariable

Mass;316L;316L(integratedtemperaturemeasurement) • Volumeﬂow

• Temperature

Mass;316L;316L(integratedtemperaturemeasurement) • Correctedvolumeﬂow

• Massﬂow

• Calculatedsaturatedsteampressure

• Energyﬂow

• Heatﬂowdiﬀerence

• Speciﬁcvolume

• Degreesofsuperheat

Description Measuredvariable

Calculated measured valuables

EF200W-C

Measuring range Themeasuringrangeisdependentonthenominaldiameter,theﬂuidandenvironmentalinﬂuences.

Thefollowingspeciﬁedvaluesarethelargestpossibleﬂowmeasuringranges(QmintoQmax)

foreachnominaldiameter.Dependingontheﬂuidpropertiesandenvironmentalinﬂuences,

themeasuringrangemaybesubjecttoadditionalrestrictions.Additionalrestrictionsapply

toboththelowerrangevalueandtheupperrangevalue.

FlowmeasuringrangesinSIunits

[mm]

Liquids

[m³/h]

Gas/steam

[m³/h]

15 0.06to4.9 0.3to25

25 0.18to15 0.9to130

40 0.45to37 2.3to310

50 0.75to62 3.8to820

80 1.7to140 8.5to1800

100 2.9to240 15to3200

150 6.7to540 33to7300

FlowmeasuringrangesinUSunits

DN Liquids Gas/steam

[in] [ft³/min] [ft³/min]

½ 0.035to2.9 0.18to15

1 0.11to8.8 0.54to74

1½ 0.27to22 1.3to180

2 0.44to36 2.2to480

3 1to81 5to1100

4 1.7to140 8.7to1900

6 3.9to320 20to4300

EF200W-C

Flow velocity

v,Q

A0033469

DiInternaldiameterofmeasuringtube(correspondstodimensionK→Seepage34)

v Velocityinmatingpipe

Q Flow

TheinternaldiameterofmeasuringtubeDiisdenotedinthedimensionsasdimension

K.→Seepage34.

Calculationofﬂowvelocity:

v[m/s]=

]h/m[Q·4

π·D [m]

i²·1

3600[s/h]

v[ /s]= 4 ·Q[ /min]ft³

π·D [ft]

i²·1

60[s/min]

A0034301

Lower range value

Arestrictionappliestothelowerrangevalueduetotheturbulentﬂowproﬁle,whichonlyoccurs

withReynoldsnumbersgreaterthan5000.TheReynoldsnumberisdimensionlessandindicatesthe

ratiooftheinertiaforceofaﬂuidtoitsviscousforcewhenﬂowingandisusedasacharacteristic

variableforpipeﬂows.InthecaseofpipeﬂowswithReynoldsnumberslessthan5

000,periodic

vorticesarenolongergeneratedandﬂowratemeasurementisnolongerpossible.

TheReynoldsnumberiscalculatedasfollows:

Re =4·Q[m

/s]· [kg/m

]ρ

·D [m]·µ[Pa·s]π

Re =4·Q[ft³/s]· [lbm/ft³]ρ

·D [ft]·µ[lbf·s/ft ]π

A0034291

Re Reynoldsnumber

Q Flow

DiInternaldiameterofmeasuringtube(correspondstodimensionK→Seepage34)

µ Dynamicviscosity

ρ Density

TheReynoldsnumber,5000togetherwiththedensityandviscosityoftheﬂuidandthenominal

diameter,isusedtocalculatethecorrespondingﬂowrate.

EF200W-C

Q [m /h]=

Re=5000 ³

5000 [Pa· ·D [m]· ·s]

πμ

· 3600[s/h]

4 [kg/m ]·³ρ

Q [ /h]=

Re=5000 ³

5000 [lbf· ·D [ft]· ·s/ft ]

²πμ

· 60[s/min]

4 [lbm/ ]· ³ρ

A0034302

QRe=5000 FlowrateisdependentontheReynoldsnumber

DiInternaldiameterofmeasuringtube(correspondstodimensionK→Seepage34)

µ Dynamicviscosity

ρ Density

Themeasuringsignalmusthaveacertainminimumsignalamplitudesothatthesignalscanbe

evaluatedwithoutanyerrors.Usingthenominaldiameter,thecorrespondingﬂowcanalsobe

derivedfromthisamplitude.Theminimumsignalamplitudedependsonthesettingforthe

sensitivityoftheDSCsensor(s),thesteamquality(x)andtheforceofthevibrationspresent(a).The

valuemfcorrespondstothelowestmeasurableﬂowvelocitywithoutvibration(nowetsteam)ata

densityof1kg/m3(0.0624lbm/ft^3).Thevaluemfcanbesetintherangefrom

6to20m/s(1.8to6ft/s)(factorysetting12m/s(3.7ft/s))withtheSensitivityparameter(value

range1to9,factorysetting5).

v [m/s]=max

AmpMin mf[m/s]

x²

AmpMin x² ρ

³m]/gk[1

ρ³m]/gk[

A0034303

vAmpMin Minimummeasurableﬂowvelocitybasedonsignalamplitude

mf Sensitivity

x Steamquality

ρ Density

Q [m /h]=

AmpMin ³

v [m/s]

AmpMin · ·D [m]

· 3600[s/h]

4· ³]m/gk[ρ

³]m/gk[1

Q [ /min]=

AmpMin ³

v[/s]

AmpMin · ·D [ft]

i²π

· 60[s/min]

4· 0.0624[lbm/ ]³

A0034304

QAmpMin Minimummeasurableﬂowratebasedonsignalamplitude

vAmpMin Minimummeasurableﬂowvelocitybasedonsignalamplitude

DiInternaldiameterofmeasuringtube(correspondstodimensionK→Seepage34)

ρ Density

EF200W-C

TheeﬀectivelowerrangevalueQLowisdeterminedusingthelargestofthethreevaluesQmin,

Q [m /h]=max

Low ³

Q [m /h]

min

Q [m /h]

Re=5000 ³

Q [m /h]

AmpMin ³

Low ³

Q [ /min]

min

Q [ /min]

Re=5000

Q [ /min]

AmpMin

A0034313

QLow Eﬀectivelowerrangevalue

Qmin Minimummeasurableﬂowrate

Q=5000 FlowrateisdependentontheReynoldsnumber

QAmpMin Minimummeasurableﬂowratebasedonsignalamplitude

Upper range value

Themeasuringsignalamplitudemustbebelowacertainlimitvaluetoensurethatthesignalscanbe

evaluatedwithouterror.ThisresultsinamaximumpermittedﬂowrateQAmpMax:

Q [m /h]=

AmpMax ³

350[m/s] · ·D [m]

· 3600[s/h]

4· ³]m/gk[ρ

³]m/gk[1

Q [ /min]=

AmpMax ³

1148[ /s] · ·D [ft]

i²π

· 60[s/min]

4· 0.0624[lbm/ ]³

A0034316

QAmpMax Maximummeasurableﬂowratebasedonsignalamplitude

DiInternaldiameterofmeasuringtube(correspondstodimensionK→Seepage34)

ρ Density

Forgasapplications,anadditionalrestrictionappliestotheupperrangevaluewithregardtothe

Machnumberinthemeasuringdevice,whichmustbelessthan0.3.TheMachnumberMadescribes

theratiooftheﬂowvelocityvtothesoundvelocitycintheﬂuid.

Ma= v[m/s]

c[m/s]

Ma=

A0034321

QRe=5000andQAmpMin.

Table des matières

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