电磁流量计英文版说明书LS.docx

电磁流量计英文版说明书LS.docx

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电磁流量计英文版说明书LS

1.SUMMARY

1.1Features

●Measurementisnotaffectedbythevariationofflowdensity,viscosity,temperature,pressureandconductivity.Highaccuracymeasurementisguaranteedaccordingtothelinearmeasurementprinciple.

●Noobstacleinthepipe,nopressure-lossandlowerrequirementforstraightpipeline.

●DN6toDN2000coversawiderangeofpipesize.Avarietyoflinersandelectrodesareavailabletosatisfydifferentflowcharacteristic.

●Programmablelowfrequencysquarewavefieldexcitation,improvingmeasurementstabilityandreducingpowerconsumption.

●Implementing16bitsMCU,providinghighintegrationandaccuracy;Full-digitalprocessing,highnoiseresistanceandreliablemeasurement;Flowmeasurementrangeupto1500:

1.

●HighdefinitionLCDdisplaywithbacklight.

●RS485orRS232interfacesupportsdigitalcommunication.

●Intelligentemptypipedetectionandelectrodesresistancemeasurementdiagnosingemptypipeandelectrodescontaminationaccurately.

●SMDcomponentandsurfacemounttechnology（SMT）areimplementedtoimprovethereliability.

1.2MainApplications

electromagneticflowmetercanbeusedtomeasurethevolumeflowofconductivefluidinaclosedpipeline.Itiswidelyappliedintheflowmeasurementandcontrolinthefieldsofchemicalandpetroleumindustry,metallurgyindustry,waterandwastewater,agricultureandirrigation,papermaking,foodandbeverageindustryandpharmaceuticalindustry.

1.3AmbientConditions

Ambienttemperature:

sensor:

-25℃to+60℃;converter:

-25℃to+60℃.

Relativehumidity:

5%to90%;

1.4WorkingConditions

Maximumfluidtemperature:

Compacttype:

60℃

Remotetype:

Teflon150℃

Neoprene80℃;120℃

Polyurethane70℃

Fluidconductivity:

≥5S/cm

2.WORKINGPRINCIPLES

2.1MeasuringPrinciples

ThemeasuringprincipleofelectromagneticflowmeterisbasedontheelectromagneticinductionlawofFarady.Thesensorismainlycomposedofmeasuringtubewithisolatelining,apairofelectrodesinstalledbypenetrationofthemeasuringtubewall,apairofcoilsandironcoretoproduceworkingmagneticfield.Whentheconductivefluidflowsthroughthemeasuringtubeofthesensor,thevoltagesignalindirectproportiontotheaverageflowvelocityofthefluidwillbeinductedontheelectrodes.Thesignalisamplifiedandtreatedbythetransmittertorealizevariousdisplayfunctions.

2.2ConverterCircuitSchematic

TheconverterssuppliesastableexcitingcurrenttothecoilinthesensorofelectroneticflowmeterstogetBconstantandamplifiestheelectromotiveforceandconvertitintostandardsignalsofcurrentorfrequencysothatthesignalscanbeusedfordisplaying,controllingandprocessing.TheschematicofconvertercircuitisshowninFig.2.1.

Fig.1Schematicofconvertercircuit

3.PRODUCTCLASSIFICATION

3.1Productcomponents

Electromagneticflowmeteriscomposedofsensorandconverter.Theremote-typealsoneedsaspecialdouble-layershieldedcabletoconnecttheconverterandthesensor.

3.2Productmodels

electromagneticflowmeterhastwoforms:

compact-typeandremote-type.Therearesevenkindsofelectrodematerialsandfourkindsofliningmaterialsavailableforsensor.

4.TECHNICALSPECIFICATION

4.1TheflowmeteriscomplianttoStandard“JB/T9248-1999ElectromagneticFlowMeter”.

4.2Maximumflowspeed:

15m/s

4.3DNsize:

3,6,10,15,20,25,32,40,50,65,80,100,150,200,250,300,350,400,450,500,600,700,800,900,1000,1200,1400,1600,1800,2000

4.4Accuracy:

0.5%,0.2%

4.5NominalPressure:

4.0MPa（DN0-150）

1.6MPa（DN200-600）

1.0MPa（DN700-1200）

0.6MPa（DN400-2000）

Orotherspecifiedbyorder

4.6Materials

ElectrodeFormsandMaterials:

Electrodedesignhasfourforms:

standardform,scraperform,detachableformandgroundingelectrode.

ElectrodematerialisselectablefromstainlesssteelcontainingMo,stainlesssteelcoatedwithcarbonizedtungsten,HastelloyB,HastelloyC,Titanium,Tantalumandplatinum-iridiumalloy.

Flangematerial:

carbonsteel

Groundingring:

stainlesssteel

Inletprotectionring:

carbonsteel,stainlesssteel

4.7Enclosure

IP65:

IP68:

onlyavailableforremote-typesensorwithneopreneorpolyurethaneliner,notincludingflameproofmodel.

4.8FlameproofStandard

DN15-DN600compact-type:

mdIIBT4

DN15-DN1600remote-type:

sensorandconverterbothinstalledindangerousarea:

mdIIBT4.

DN15-DN1600remote-type:

sensorinstalledindangerousareaandconverterinstalledinsafearea:

mdIIBT4

4.9ConnectionCable

Specialcableisneededtoconnectthesensorandtheconverterforremote-typeflowmeter.Thecablelengthshouldnotexceed100meters.A10-metercableissuppliedfreeofchargeandtherestistobeordered.

4.10GeneralSpecificationofConverter

●Powersupply:

AC85-265V,45-63Hz,≤20W;DC11-40V

●Converterdisplayandoperation:

fourkeysareavailabletosetallparameters.ExternalhandheldorPCcanbeusedtodotheconfiguration.HighresolutionLCDdisplaywithbacklight,emptypipedetectionandself-diagnosticfunctionareequippedintheconverter.

●Digitalcommunication:

RS485,RS232,MODBUS,REMOTE

●OutputSignals:

-Currentoutput:

fully-isolated,4-20mA/0-10mA

loadresistance:

0-10mA:

0-1.5KΩ;4-20mA:

0-750Ω.

-Frequencyoutput:

bidirectionalflowoutput.Frequencyoutputisproportionaltotheflowpercentageofthefullrange.Theconverterprovidesfullyisolatedtransistoropencollectorfrequencyoutputrangedfrom1to5000Hz.TheexternalDCpowersupplyshouldnotexceed35Vandmaximumcollectorcurrentis250mA.

-Pulseoutput:

bidirectionalflowoutput.Theconvertercanoutputupto5000cp/spulseseries,whichisdedicatedtoexternaltotalization.Pulsefactorisdefinedasvolumeormassperpulse.Itcanbesetto0.001L/p,0.01L/p,0.1L/p,1L/p,2L/p,5L/p,10L/p,100L/p,1m3/p,10m3/p,100m3/por1000m3/p.Pulsewidthisselectablefromauto,10ms,20ms,50ms,100ms,150ms,200ms,250ms,300ms,350msand400ms.Photo-couplerisolatedtransistoropencollectorcircuitisusedforpulseoutput.TheexternalDCpowersupplyshouldnotexceed35Vandmaximumcollectorcurrentis250mA.

-Flowdirectionindication:

Theconverteriscapableofmeasuringbothforwardandreverseflowandrecognizingitsdirection.Theconverteroutputs0Vlowlevelforforwardflow,while+12Vhighlevelforreverseflow.

-Alarmoutput:

Twochannelsofphoto-couplerisolatedopencollectorcircuitareusedforalarmsignaloutput.Therearetwoalarmoutputs:

highlimitalarmandlowlimitalarm.TheexternalDCpowersupplyshouldnotexceed35Vandmaximumcollectorcurrentis250mA.

-Dampingconstant:

Dampingtimeisselectablefrom0.2to100s.

5.APPEARANCEANDINSTALLATION

DimensionsofConverter,shownasFig3.

6.CONVERTEROPERATIONMENUANDPARAMETERSETTING

6.1KeypadandDisplay

Fig.5（a）Remote-typekeyanddisplay

Fig.5（b）Compact-typekeyanddisplay

6.2KeypadFunction

1.AutomaticMeasurementMode

DOWN:

Scrollbottomlinedisplay;

UP:

Scrolltoplinedisplay;

ALT+ENTER:

Enterintosettingmode;

ENTER:

Returntomeasurementmode.

2.ParameterSettingMode

DOWN:

Subtractoneformthedigitatthecursor;

UP:

Addoneonthedigitatthecursor

ALT+DOWN:

Cursorshiftsleft

ALT+UP:

Cursorshiftsright

ENTER:

Enter/exitsubmenu;

ENTER:

Returntomeasurementmodeifheldfor2secondsatanylocation

Remarks:

（1）WhenusingALTkey,holdALTfirstandthenpressUPorDOWN.

（2）Undersettingmode,themeterreturnstomeasurementmodeautomaticallyifnokeyispressedfor3minutes.

（3）Whenadjustingflowzero,UPorDOWNkeycanbeusedtochangethesign（+/-）.

（4）Whensettingflowrange,UPorDOWNkeycanbeusedtochangeflowunit.

6.3ParameterConfigurationandOperationPassword

Thesettingparametersdeterminetheoperationstatus,calculationmethodandoutputmodeoftheflowmeter.Properlysettingmeterparametercanmakethemeterworkinbestconditionandhigheraccuracyofdisplayandoutputcanbeobtained.

Therearefivelevelsofpassword,wherelevel0-3areopenforuserandlevel4reservedformanufacturer.Level1to2passwordsarechangeablebyhigherlevelpassword-holder,e.g.Level-3password.

Metersettingcanbebrowsedbyenteringanylevelofpassword.However,higherlevelpasswordisneededtochangesettings.

♦PasswordLevel-0（defaultvalue0521）:

fixedandbrowsingonly;

♦PasswordLevel-1（defaultvalue7206）:

changeableandauthorizedtomodifymenuitem1to25;

♦PasswordLevel-2（defaultvalue3110）:

changeableandauthorizedtomodifymenuitem1to29;

♦PasswordLevel-3（defaultvalue2901）:

fixedandauthorizedtomodifymenuitem1to38;

♦PasswordLevel-4（reserved）:

fixedandauthorizedtomodifyanymenuitemincludingresettingsystem.

♦TotalizerResetPassword（defaultvalue36666）:

changeableinmenuitem‘ClrTot.Key’andauthorizedtoclearthethreeinternalcounter.

ItissuggestedthatLevel-3passwordbeheldbymanagerorsupervisorwhileLevel-0to2passwordsbekeptbyoperator.TheLevel-3passwordcanalsobeusedtochangethepasswordfortotalizerresetting.

6.4TableofParameterSettingMenu

Theconvertersettingmenuconsistsof45items.Manyofthemaresetupbymanufacturerbeforeshipping.Itisnotnecessarytochangethemwhenapplying.Thereareonlyafewofthemtobesetbyuseraccordingtotheapplication.Themenuitemsarelistedinthetablebelow:

ItemNo.

MenuDisplay

SettingMethod

PasswordLevel

ValueRange

1

Language

Option

1

English

2

SensorSize

Option

1

3-3000mm

3

FlowRange

Modify

1

0-99999

4

AutoRngChg

Option

1

ON/OFF

5

Damping

Option

1

0-100s

6

FlowDir.

Option

1

Fwd/Res

7

FlowZero