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.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
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