ABB濁度計(jì)4670使用手冊(cè)

DataSheetSS/4670Issue15TurbiditySystems4670Ultralowbackscatter–veryaccuratereadingsasonlylightscatteringduetoturbidityismeasured.Drysecondarystandardssuppliedforzeroandspanverification–accurate,repeatable,simple;eliminatestheneedforformazinesolutionsUltra-stableelectronics–practicallynodrift–infrequentcalibrationrequiredAuto-cleansystems–optimizesperformanceandreducesmaintenanceonlowandhighturbiditysamplesOn-linediagnostics–providesassuranceofperformanceoftheauto-cleanfunctionFlowanddipsystems–versatiledesign–satisfiesawiderangeofapplicationsBubblerejectionfunction–compensationforerroneousreadingsduetodegassingLong-term,reliableperformanceturbiditysystemswithlowcostofownershipTurbiditySystems4670SS/4670Issue154670SeriesTurbiditySystemsAnABBturbiditysystemcomprisesa4670wall-mounting,or4675panel-mounting,analyzertogetherwithoneoffoursensortypesdesignedtomeetspecificapplications.TurbiditySensorsThesensorsareavailableinflowanddipversionsand,whereappropriate,aresuppliedwithauto-cleaningtominimizemaintenancetoovercomeopticalfoulingandoptimizeperformance.Model7997-202(usedon4670/221&4675/221)Aflow-throughsystem,utilizingthe90°scatteredlightprinciple.Itisdesignedspecificallyformonitoringfinal-treatedpotablewaterandfilteredwaterwhereaccurateresultsbelow0.1NTUaredemanded.Theunitoperatesovertherange0...30NTUwithaminimumoperatingrangeof0...1NTU.Highstabilityisthekeytothevirtuallifetimezeroandtheultra-lowbackscatterpermitstheunittobeusedwithfullconfidencebelow0.1NTU.Model7997-201(usedon4670/211&4675/211)Aflow-throughsystemutilizingthe90°scatteredlightprinciple,designedtooperateovertherange0...30NTUwithaminimumoperatingrangeof0...1NTU.Itistheidealsolutionforcleanwaterapplications.Auto-cleaningisastandardfeature,togetherwithon-linediagnostics.Model7997-200(usedon4670/201&4675/201)Aflow-throughsystem,utilizingthe90°scatteredlightprincipal,designedtooperateovertherange0...250NTU.Itisidealformonitoringrawwateronpotablewatertreatmentplants.Incorporatesauto-cleaningasstandardand,usedwiththe4670or4675Analyzers,operatesfrom0...25NTU;upto250NTU,byprogrammingthe4600Seriestotherequiredrange.Model7997-300(usedon4670/301&4678/301)Aflow-throughsystemdesignedforhighlevelsofturbidityandutilizestheabsorptionprincipalofmeasurement.Itoperatesovertherangeof0...500FTUwithaminimumrangeof0...100FTU.Thismodelincorporatesauto-cleaningasstandardandisusedprimarilyforeffluentdischargemonitoringandonwaterintakeswheretheriverwatercanbecomeveryturbid.ItisalsousedextensivelyonFilterBackwashapplications.WiperCleaningModule7997-4XXSeriesThreedipversionsareavailable.Allthreeoperateovertherangeof0...2000FTUwithanincreasedaccuracyspecificationwhenusedovertherangeof0...1000FTU(theminimumrangeis0...100FTU).Thesesystemsarecompletelyunaffectedbyambientlight:7997/400(usedon4670/401&4675/401)Dipstemlengthof1m(39.3in.)Designedprimarilyforuseinopenchannelsandtanks.7997/401(usedon4670/411&4675/411)Dipstemlengthof2m(78.7in.)Designedprimarilyforuseinopenchannelsandtanks.7997/450(usedon4670/450&4675/450)Flow-throughsystemdesignedforwaterapplicationsthathavehighturbidityvalues.TurbiditySystems4670SS/4670Issue15DrySecondaryCalibrationStandardAkeyfeatureofthesystemisthedrysecondarycalibrationstandard,whichsimplifiesroutinecalibrationandvirtuallyeliminatestheneedforchemicalstandards....amajorsafetyfactor.Thisisavailableforallmodels,includingthedipsystem,andprovidesaveryconvenient,repeatableandsafecalibrationtechnique.EaseofMaintenanceAswithallanalyzers,thekeytosuccessisthereliabilityofthesensingdevicecoupledwithsimplemaintenanceprocedures.Thesensingsystemsareveryeasytomaintainandcanbesite-servicedwithouttheneedofaskilledtechnician.AutomaticCleaningAutomaticcleaningisanessentialfeaturewhichovercomestheproblemofopticalfoulingandensuresthatperformanceismaintainedforlongperiods(upto6months)withouttheneedformanualintervention.Thisfeaturehasproveninvaluableevenonapparently'clean'watersampleswheresmallamountsofiron/manganesecancausefoulingproblems.ConfidenceinServiceTocomplementthesystem'swellprovendesign,unrivalledaccuracyandreliabilityinservice,theentiresensingloopisregularlyself-monitoredtoensurethelightsourceisoperatingwithinspecification,therebyeliminatingtheriskofelectricaldrift.Inaddition,thefunctionofthewipermoduleiscontinuouslyvalidatedbytheprocessor,therebyassuringthecorrectperformanceofthecleaningfunction.DrysecondarycalibrationstandardEaseofCalibrationCalibrationcanbecarriedoutusingFormazinestandardorbyusingtheoptionalsecondarycalibrationdevice,whichcanbeorderedseparately.Thisenablesbothzeroandspancheckstobecarriedout.BubbleRejectionReadingsareoftenaffectedbyshort-termspikes,usuallyduetotheeffectofdegassing.Theseoccureventhoughthesampleispassedthroughadebubbler.Thetransmittercanbeprogrammedforbubblerejectionbytakingseveralreadingsinshortsuccessionandrejectinganyspurioushighreadings.Anaverageistakentogiveasteadyresult.TurbiditySystems4670SS/4670Issue15PracticalOn-lineSystemsTurbiditysensorsareroughlydividedintotwomaintypes:aNephelometers,whichmeasuretheproportionoflightscatteredataspecificangle,thatis,90°fromtheincidentbeam.Forexample,4670/211and4670/201AbsorptiometersThisisprobablythemoststraightforwardmethodofmeasuringturbidity.Alightbeamistransmittedthroughthesample,theintensitiesofwhicharemeasuredbyaphotodetectorinlinewiththelightsource.ThemeasurementofturbidityusingAbsorptiometerscanbeaffectedbythepresenceofdissolvedcolour.However,sucheffectsareminimizedbyperformingthemeasurementatawavelengthof880nmwhichisintheinfraredregion.Thesystemcanalsobeinsensitivebecausechangesinturbidityatlowlevelsonlygiveaverysmallchangeinoutputfromthedetectorwhichisdifficulttoresolve.Atmediumandhighlevelsofturbiditythisisusuallynotaproblem,sothistechniqueprovidesareliablemethodformanyapplications.bAbsorptiometers,whichdependuponthemeasurementoftheabsorption(orattenuation)ofalightbeampassingthroughthesample.Forexample,4670/300and4670/400.NephelometersThistypeofturbiditymeterdetectslightscatteredbythesuspendedparticlesinthesample.Themostwidelyusedopticalarrangementforscattered-lightturbiditymetersisthe90°Nephelometerdesign.Thismustnotbeconfusedwithinstrumentsthatarebasedonforwardorbackwardslightscatter.Nephelometersovercomemanyproblemssuchascolourandlackofsensitivity.AbsorptionTurbidityMonitorLightScatteredbySuspendedParticlesNephelometricTurbidityMonitorTurbiditySystems4670SS/4670Issue15ApplicationsofTurbidityMeasurementThemajorityofturbiditymonitorinstallationsinthewaterindustryareinpotablewatertreatmentplants,althoughsometurbiditymeasurementsarecarriedoutonsewage/wastewatertreatmentplants.Normally,theinstrumentsusedforsewage/wastewatertreatmentsplantsarecalibratedtofindsuspendedsolids,thatis,mg/lratherthanturbidity.Inpotablewatertreatmentthereisanincreasingrequirementforturbiditymeasurementinrawwaterabstraction,throughthewatertreatmentprocess,andfinallythetreatedwaterquality.BothAbsorptiometersandNephelometersarecalibratedagainstformazinesuspensions.Theywill,therefore,givegoodagreementondifferentformazinevalues.Itmustbenotedthattheresultsprovidedbyanytwodifferentturbiditymethods,calibratedonformazine,generallydifferwhenusedonsamples.Exactlywhathappenstothelightbeamwhenitencountersaparticledependsuponmanyparameters,suchasthewavelengthofthelightsource,particlesizeandshapeandtherefractiveindexoftheparticle.ChoiceofSystemTherangeofABBturbiditysystemsincludesensorsbasedonbothAbsorptionandNephelometrictechniques.Thechoiceofasuitablesystemtouseforagivenapplicationdependsontheapplicationitselfandisgenerallydependentontwofactors:MeasurementRangeAsageneralguideturbiditiesbelow100woulduseaNephelometrictypesensor;above100anAbsorptiontypesensorwouldbemoreappropriate.IndependentsitelaboratorymethodorstandardIftheabovecriteriawasstrictlyfollowedtherecouldbeasituationwherethelevelofturbidityislow,suchas10NTU,butanAbsorptioninstrumentisusedintheindependentlaboratoryorreferencemethod.Conversely,aNephelometricinstrumentinthelaboratorycouldbeusedonsamplesat200NTU.TurbidityMeasurementinPotableWaterTreatmentTurbiditySystems4670SS/4670Issue15ElectricalConnections4670Panel-mountVersionforusewith7997200Seriesand300Sensors4675Panel-mountVersionforusewith7997400Seriesand410SensorsTurbiditySystems4670SS/4670Issue154670/500Wall-mountingVersionforusewith7997-202,7997201and7997-200series,7997-300and7997-410SensorsMountingWallPanel112Cleanerinitiatepulse211+12Vswitchedemittersupply310+12Vcleaner/receiversupplyTerminalNumber49Signalinput58Cleaner*Detectsignal67760Vcommon*Link(noton7997-400/400sensors)*Notusedon7997400TurbiditySystems4670SS/4670Issue15Specification7997-200TurbiditySensorRangeProgrammable0...25NTUto0...250NTUand0...500mg/l(orp.p.m.)Note.Themaximumrangeforsuspendedsolidsmeasurementisdependentuponthecoefficientvalueofthesample.MeasurementPrinciple90°scatteredlightmeasurement.ComplianttoISO7027MeasurementCharacteristicLinearbasedonFormazineResolution0.1NTURepeatabilityBetterthan1%ofspanAccuracy±2%ofreading(limitedbyuncertaintyinFormazinestandards)from0...100NTU±5%from100...250NTUTemperaturedrift0.005NTU/10°C(0.003NTU/10oF)ResponsetimeVarieswithflowrate,typically90%stepchangein2minutesat1l/min-1.Flowrate0.5...1.5l/min-1IntegralwipercleaningsystemProgrammableoperationalfrequencyevery0.25hour,0.5hour,0.75hourormultiplesof1hourupto24hoursSampleoperatingtemperature0...50°C(32...122°F)SamplePressureUpto3bar(43.5psi)7997-201&7997-202TurbiditySensorsRangeProgrammable0...1NTUto0...30NTUMeasurementPrinciple90°scatteredlightmeasurement.ComplianttoISO7027MeasurementCharacteristicLinearbasedonFormazineResolution0.01NTURepeatabilityBetterthan1%ofspanAccuracy±2%ofreading(limitedbyuncertaintyinFormazinestandards)Temperaturedrift0.005NTU/10°C(0.003NTU/10oF)ResponsetimeVarieswithflowrate,typically90%stepchangeinlessthan45sat1l/minFlowrate0.5...1.5l/min-1Integralwipercleaningsystem(7997-201only)Programmableoperationalfrequencyevery0.25hour,0.5hour,0.75hourorinmultiplesof1hourupto24hoursSampleoperatingtemperature0...50°C(32...122°F)SamplepressureUpto3bar(43.5psi)TurbiditySystems4670SS/4670Issue157997-300TurbiditySensorRangeProgrammable0...100FTUto0...500FTUand0...1000mg/l(orppm)(SeeNote.)MeasurementPrincipleTransmittedlightMeasurementCharacteristicLogarithmicbasedonFormazineResolution1FTURepeatabilityBetterthan1%ofspanAccuracy±2%ofFSD(limitedbyuncertaintyinFormazinestandards)Temperaturedrift0.2FTU/°C(0.1FTU/°F)ResponsetimeVarieswithflowrate,typically90%stepchangein2minutesat1l/min-1Flowrate0.5...1.5l/min-1IntegralwipercleaningsystemProgrammableoperationalfrequencyevery0.25hour,0.5hour,0.75hourorinmultiplesof1hourupto24hoursSampleoperatingtemperature0...50°C(32...122°F)PressureUpto3bar(43.5psi)7997-400,7997-401Dip&7997-405FlowTurbiditySensorsRangeProgrammable0...100to0...1000FTUand0...2000mg/l(SeeNote.)ExtendedRange0...2000FTUMeasurementPrincipleTransmittedlightMeasurementCharacteristicLogarithmic,basedonFormazineResolution1FTURepeatabilityBetterthan1%ofspanAccuracy(0to1000FTU)±2%FSD(limitedbytheuncertaintyofFormazine)Accuracy(0to2000FTU)Betterthan±10%ofspanTemperaturedrift0.2FTU/°C(0.1FTU/°F)Flowrate(7997-405only)0.5...2l/min-1IntegralwipercleaningsystemProgrammableoperationalfrequencyevery0.25hour,0.5hour,0.75hourorinmultiplesof1hourupto24hoursSampleoperatingtemperature0...50°C(32...122°F)Dipstemlength7997-4001m(3.3ft)7997-4012m(6.6ft)Pressure(7997-405only)Upto3bar(43.5psi)Note.Themaximumrangeforsuspendedsolidsmeasurementisdependentuponthecoefficientvalueofthesample.TurbiditySystems4670SS/4670Issue154670-5/500AnalyzerModelsDisplayMeasuredvalue5-digitx7-segmentbacklitLCDInformation16-character,singleline,dotmatrix,backlitLCDRangesUsedwith7997-202/201Usedwith7997-200Usedwith7997-3000...1to0...30NTU0...25to0...250NTU0...100to0...500FTUand0...1000mg/lRelayOutputsandSetPointsNo.ofrelaysTwoRelaycontactsSinglepolechangeoverRating250VAC250VDCmax.3AAC,3ADCmax.Loading(non-inductive)750VA30Wmax.(inductive)750VA3Wmax.Insulation2kVRMScontactstoearth(ground)No.ofsetpointsTwoSetpointadjustmentProgrammableSetpointhysteresis±1%fixedLocalsetpointannunciationRedLEDUsedwith7997-400/401/4050...100to0...1000*FTUand0...2000mg/l*0...2000FTUwithreducedaccuracyUnitsofmeasurementNTUandFTUallmodelsmg/lonmodels7997-300and7997-400Accuracy±0.2%ofreading,±1digitLinearity±0.1%FSDAuto-cleantimingProgrammable15min,30min,45minor1hourupto24hoursin1hourincrementsRetransmissionNo.ofretransmissionsignalsOnefullyisolatedprogrammable0...10mA,0...20mAor4...20mAOptionalsecondcurrentoutputAccuracy±0.25%FSD±0.5%readingResolution0.1%at10A,0.05%at20mAMax.loadresistance750?(20Amax.)EnvironmentalDataOperatingtemperaturelimits–20...55°C(–4...131°F)Storagetemperaturelimits–25...55°C(–13...131°F)OperatinghumiditylimitsUpto95%RHnon-condensingMechanicalDataModel4670/500Wall-mountingProtectionDimensionsWeightModel4675/500Panel-mountingProtectionDimensionsWeightPanelcut-out:(?DIN)IP66/NEMA4Xfront96mm(3.78in.)widex96mm(3.78in.)highx191mm(7.52in.)deep1.5kg(3?lb)92+0.8–0PowerSupplyVoltagerequirements100...130V,200...260V,50/60HzPowerconsumption<6VAACErrorduetopowersupplyvariationLessthan0.1%for+6%–20%variationfromnominalsupplyInsulationMainstoearth(linetoground)2kVRMSIP66/NEMA4X160mm(6.30in.)widex214mm(8.43in.)highx68mm(2.68in.)deep2kg(4?lb)mmx92+0.8–0mm+0.03–0+0.03–0in.x3.62in.)TurbiditySystems4670SS/4670Issue15OverallDimensions7997-202Sensor7997-200&7997-201Sensors7997-300Sensor7997-400&7997-401SensorsTurbiditySystems4670SS/4670Issue157997-405Sensor7997-405Sensor7997-405SensorTurbiditySystems4670SS/4670Issue15MountingtheDe-bubblerDebublerMountingInformation(De-bubblerPartNumber7997500)TypicalSystemInstallationfor7997200Seriesand7997300FlowSystemsTurbiditySystems4670SS/4670Issue15OrderingInformationTurbiditySystemsAnalyzerTypeWall-mountingTurbidityAnalyzercaseIP66/NEMA4X.Rangeprogrammablefrom0...1NTUto0...250NTUor0...50FTUto0...1000FTU(extendedrange0...2000FTU).CompletewithHighandLowalarmrelaysandisolatedcurrentoutput(programmable0...10mA,0...20mAor4...20mA)andauto-clean.Powersupply110/240VACAsabovewith2outputsAsabovewithModbusPanel-mountingTurbidityAnalyzer96x96mmDINcaseIP66/NEMA4X.Rangeprogrammablefrom0...1NTUto0...250NTUor0...50FTUto0...1000FTU(extendedrange0...2000FTU).CompletewithHighandLowalarmrelaysandisolatedcurrentoutput(programmable0...10mA,0...20mAor4...20mA)andauto-clean.Powersupply110/240VACAsabovewith2outputsAsabovewithModbusSensorTypeFlow-throughsystem,range0...30NTUmax.,0...1NTUmin.,utilizing90oscatteredlight.Processconnections,inlet/outletbarbhoseuse12mmIDtube.(7997–202sensor).Flow-throughsystem,range0...250NTUmax.,0...25NTUmin.,utilizing90oscatteredlight.Processconnections,barbhoseuse12mmIDtubeinlet/6mmIDtubeoutlet.Completewithauto-clean.(7997–200sensor).Flow-throughsystem,range0...30NTUmax.,0...1NTUmin.,utilizing90oscatteredlight.Processconnections,barbhoseuse12mmIDtubeinlet/6mmIDtubeoutlet.Completewithauto-clean.(7997–201sensor).Flow-throughsystem,range0...500FTUmax.,0...100FTUmin.,0...1000mg/lutilizinglightabsorption.Processconnections,barbhoseuse12mmIDtubeinlet/6mmIDtubeoutlet.Completewithauto-clean.(7997–300sensor).1mDipsystem,range0...1000FTUmax.(extendedrange0...2000FTU),0...100FTUmin.,0...2000mg/lutilizinglightabsorption.Processconnections,N/A.Completewithauto-clean.(7997–400sensor).2mDipsystem,range0...1000FTUmax.(extendedrange0...2000FTU)0...100FTUmin.,0...2000mg/lutilizinglightabsorption.Processconnections,N/A.Completewithauto-clean.(7997–401sensor).Flow-throughsystem,range0...1000FTUmax.(extendedrange0to2000FTU)0...100FTUmin.,0...2000mg/lutilizinglig