美國ECO公司生產(chǎn)，在線式擴(kuò)散氧檢測儀DOM-1特點(diǎn)：1.可以處理高壓水流2.針對臭氧3.費(fèi)用低，容易可更換部分4.可設(shè)置的報警點(diǎn)或控制點(diǎn)5.4-20mA輸出6.精確測量被污染或臟水SpecificationsAccuracy:Betterthan20%;10%typicalReadout:0.03-2.00ppmin0.01ppmincrementsOutputs:NO/NCcontacts 4-20mARelayRatings:5Ampsat250VACLowestreading:0.03ppmProtectionSpecifications:IP52.Enclosureispolycarbonate.FrontcoverisclearpolycarbonateWarm-Up:1hourResponseTime:20-30secondsSupplyWaterPressure:15-90PSIWaterTemperatureRange:20-30degC(unlessrecalibratedforaspecifictemperature)PowerSource:12VDC800mA[ACAdapterincluded]Requirements: Waterfeedat 14psi(1bar) 0.15liters/minute(3gallons/hour)flowtodrainorreclaimCalibration:Sensormustbecalibratedmonthlytoacoloremetricstandardonaweeklybasisforbestaccuracy.Note:DOM-1canmeasureozoneaccuratelyupto150PPMwhenusedwithaspeciallycalibratedUV-100OzoneAnalyzer!-CallfordetailsWarranty:1yearINSTALLATIONTherearefourmajorinstallationstepsfortheDOM-1thatshouldbeplannedinadvanceoftheequipmentdelivery.Theyare(Refertofigures1,2and3):21-ConnectionfromyourprocesstotheDOM-1stripperassembly.Thisshouldbeasshortaspracticaltoavoidsignificantozonedecaylossinitsslowpassage(.2L/minor3gallons/hour)fromyourprocesspipetoourstrippingchamber.Itshouldbepreferablyozone-resistantplastictubingtodampoutanyvibrationsthatcouldbetransmittedtotheinstrumentationandtomakeinter-unitalignmenteasier.Thereshouldalsobeavalvebetweenyourpipeandourstripperunitsothatthewaterflowcanbecutoffwheninstallingorworkingonourequipment.Asingleturnchemicalresistantvalveisrecommended.Thewaterinputtoourstripperassemblycanbetoa1/4 NPTfemaleinputinthestrainerunit,acompressionfittingviaanadaptertotheNPTthread,ortoa1/4 (6-7mm)hosebarbadapter.Besurethatthesamplevalvejustbelowthegaugeisclosed(handleperpendiculartotheflowchannel).Thestripperassemblycouldbemountedtothewallbystandoffclamps.Itshouldbeorientedsothatthewaterflowsinhorizontallyandthedrainoutputofthestrippingchamberispointingdown.Itisimportantthatthestrippingchamberbemaintainedinaverticalposition(theairtubingandwaterinletatthetop).Seefigure1.2-Drainingofthesamplewaterfromthestripperassembly.Thedrainfromthestripperassemblyis9.5mm(.375 )insidediameter(ID)plastictubingatleast127mm(5 )long.Itsupperendisconnectedtothetubingbarbontheloweroutsidesurfaceofthestrippingchamber.Thistubeshouldalwaysbeorientedsothatthedrainwaterisfreelyflowingdowntotheplantdrain.Donotallowthedrainwatertoriseandbackupintothestripperassembly.3-ConnectionsbetweentheStripperAssemblyandtheElectronicsUnit.Therearetwo2foot(600mm)lengthsof3/16 ID(5mm)chemical-resistanttubingthatinterconnectthetwounitsusingthepairoftubingbarbsfoundonthebottomrightoftheelectronicsunitandatthetopofthestripperassembly.Eithertubingcanbeattachedtoeitherbarb.Thereisnoinherentdirectionalitythatneedbemaintained.Beforeattachingtothebarbsonthestrippingchamberthetwotubingsarerunthroughtheblackhold-downcliponthesideofthechambertoorganizeandsecurethetubing.Donotconnectthetubingfromthestrippingassemblytotheelectronicsunituntilthestrippingassemblyhasbeentestedwithwaterunderpressure.Thetubingshouldnotbeconnectedtotheelectronicsunituntilyouarecertainthatnowaterisleakingthroughthetubing.Thewatercouldseverelydamagethesensorandothercomponentsintheelectronicsunit.TheElectronicsUnithasthreemountingpoints:akeyholeattheuppercenterintheback,andtwolowercornersideholdsaccessedbyremovingtheaccesscoverattheloweredgeoftheElectronicsUnit.4-PowertotheDOM-1TheDOM-1requiresanACadapterthatdelivers12VDCunregulatedat800mA.Mostcommonadaptersofthisnominalratingdeliver12-14voltswhichisanacceptablerangefortheDOM-1.Theadaptercanplugintothecenter+powerjackonthebottomoftheDOM-1orcanbewiredtotheterminalblockintheleftsideoftheaccesstrayintheDOM-1.Alternately,12VDCcanbebroughtinbystandardelectricalconduitfromelsewhereinyourplant.Theconduitcanattachataknockoutatthebottomoftheelectronicsunitandthe12VDCwiringmadetotheterminalblockjustinside.Besurethatgoodearthgroundingpracticeisfollowed.