美國ECO公司生產(chǎn)，便攜式臭氧檢測儀A-21AX.特點(diǎn)：1.小尺寸，高靈敏度2.容易標(biāo)定和服務(wù)3.加熱時間快4.操作簡單SpecificationsRange:0-10ppm,sensitivityaslowas0.02ppmDisplayDigitalreadoutin0.01ppmincrementsMeasurementprincipleHMOS(heatedmetaloxidesemiconductor)sensorPowerrequirements12VDCunregulated,ACadapterincludedBatteryInternalbattery(NiMH6-8hrpercharge)willfullychargeovernightSize:50 100 25mm(2 4 1in)Weight170grams(6oz)TemperatureRange:32-104F(0-40C)HumidityRange:0-80%relativelhumidity OPERATIONTurnthefunctionswitchtoOn.Digitsshouldappearonthereadout.Afteraboutaminutethedisplaywillshow0.00oraslightlypositivereading.Iftherearenoreadoutdigits,thebatteriesaredischarged.(Forcharging,seeBatteryOperation.)TheA-21ZXinstrumentcanalsobeusedasapermanentmonitorintheOnpositionofthefunctionswitchusingthechargerasapowersource.Inthiscase,theaveragelevelsoftheozoneshouldn texceed.1ppmtomaintainstablereadingsandtoavoidcorrosionoftheelectronics.Readingsabove1ppmshouldbebrief.Forleakchecking,bringthesensorascloseaspossibletothesuspectedleak.Formonitoring,orienttheinstrumentsothatthesensorisperpendiculartoorfacingawayfromanyairflow.Ifthereisairflowintothegasinlet,thereadingsmaybehigherthantheyshouldbe.TheA-21ZXresponsivityslowsattemperaturesbelow50degF(15degC).Tominimizethis,keeptheinstrumentwarmbykeepingitspoweronorbystoringitinawarmplaceuntiljustbeforeuse.Acidgasesandcertainotherconditionscausetheinstrument sreadingstocreepupafterestablishingastablepoint.Outdoors:operateatabovefreezingtemperaturesandduringtheday.Semiconfabs,sewagetreatmentplants,etc.:avoidacidgasesandsulfurcompounds.Watertreatmentplants:avoidstrongchlorineconcentrations.Ingeneral,aftertheinstrumenthasreachedastablereadinginaboutaminute,itisbesttoturnitoffortoremoveittoaprotectedarea.Amechanicalshocktotheinstrumentcancauseittozero.Itwillrecoverinafewminutes.CHARGINGANDWARM-UP