Continuousturbiditymonitoringisoneofthebestwaystodetectchangesinwaterquality.TheadvancedAccu4™TurbiditySystemoperatesinaccordancewithUSEPAapprovedGLIMethod2andISO7027-1984(E)toprovideunparalleledmeasurementstabilityandaccuracyindrinkingwatertreatmentplantapplications.Accu4’spatentedfour-beamratiometricmeasurementtechnologyeliminateserrorscausedbyfoulingandcomponentagingwhichareproblemscommonlyassociatedwithsingle-beam,white-lightsourceinstruments.PulsedLEDsareusedtoprovidelong-termstablecalibrationsandminimizelightsourcereplacementrequirements.ThepatentedCal-Cube™makesverificationoftheAccu4™system’scalibrationquickandeasy.Thisuniquecalibrationcubeprovidesafactory-certified,100%reproducibleNTUvalue.TheCal-Cube™isahighlystablesecondarystandardwhichisnotaffectedbylight,temperature,oraging.Accu4™Low-RangeTurbidimeterSystemJustAddWaterSS-T5320,Rev.602(supersedesRev.701)WorldwideHeadquartersandSales:GLIInternational,Inc.Phone:[414]355-36019020WestDeanRoadFax:[414]355-8346Milwaukee,Wisconsin53224E-mail:info@gliint.comU.S.A.Web:•UniqueturbidglasscalibrationverificationIntegralbubbletrapColorcompensationLonglastingLEDlightsourcesT53AnalyzerPatented,four-beamratiometricmethodUSEPA-approvedGLIMethod2Menu-guidedoperationSimpleinteractivediagnosticsMultipleoutputsandrelaysMultiplelanguagecapabilityOrderingInformationAccu4™SystemAnalyzer:T53A4A1NSensor:8320T1A0C3NCalibrationCubeAssembly:8220G1300Foradditionalorderinginformation,pleasecontactGLIInternational.Accu4™SystemTechnologyThefour-beammethodusestwolightsourcesandtwophotodetectorsspacedat90°intervalsaroundthesamplechamber.Twomeasurementphasesprovidefourindependentmeasurementsfromtwolightsources.Duringphase1,photodetector#2providesa90°scatteredlightactivesignal,whilephotodetector#1providesaforwardscatteredlightreferencesignal.Duringphase2theprocessisreversed.Themicroprocessorusesaratiometricalgorithmtocalculatetheturbidityvaluefromthefourreadings.Thismethodmathematicallycancelstheerroreffectsfromagingorfoulingofthecomponentsandcompensatesforcoloreffects.Evenasthedetectorsensitivitychangeswithage,thefour-beammethodcancelstheeffectsofthesechangeswithouttheneedforre-calibration.GLIoffersanoptionalCal-Cube™assemblytoconvenientlyverifycalibration.EachpatentedglasscalibrationcubeisfactorycertifiedtoaknownU.S.EPAapprovedformazinstandard.Thisextremelystablestandardensuresunparalleledreproducibilityofcalibrationandmeasurementaccuracy.Display:BacklitdotmatrixLCDMeasuringRange:0.000–1.000,0.00–10.00,and0.0–100.0NTUwithauto-rangingAmbientTemperature:-20to+60°C(-4to+140°F)Relays:FourelectromechanicalAnalogOutputs:Twoisolated0/4–20mACommunication:OptionalHART®ProtocolPower:90–130or180–260VAC,50–60HzSystemPerformance:Accuracy:±2%ofreading,allrangesSensitivity:0.001NTURepeatability:0.1%ofspanorbetterEnclosure:1/2DIN,NEMA4X(IP65)withhardwareforsurface,panel,orpipemountWeight:4lb.,1oz.(1.86kg)SpecificationHighlightsAmbientTemperature:0–60°C(32to140°F)SampleTemperature:0–60°C(32to140°F)FlowRate:0.05–7GPM(0.19–26.5LPM)PressureRange:Standard:0–50psigat68°FHighpressureoptionavailableResidenceTime:9.5secondsat1GPMWettedMaterials:PVC,polycarbonate,polystyrene,PPO,nitrileandBuna-NEnclosure:NEMA4X(IP65)withfourintegraltabsforsurfacemountingWeight:10lb.(4.5kg)SpecificationHighlights