簡(jiǎn)介 標(biāo)準(zhǔn)和低斷面面積流速傳感器 美國(guó)ISCO4250速度面積便攜式流速超聲波測(cè)量?jī)x探頭的流線型造型避免了有機(jī)物殘?jiān)退髦谢瘜W(xué)成分的腐蝕 密封設(shè)計(jì)能避免油脂堵塞，從而使其長(zhǎng)期可靠運(yùn)行 標(biāo)準(zhǔn)探頭適用于較大管徑，帶有高濃度懸浮固體和氣泡的混濁水流 低斷面探頭適用于淺流，水位可低至1英寸（25毫米） 可選擇電話調(diào)制器-提供獲取遠(yuǎn)程數(shù)據(jù)，語(yǔ)音信息，和警報(bào)信號(hào) 可以支持不超過(guò)3個(gè)單獨(dú)的內(nèi)部4-20mA輸出 美國(guó)ISCO4250速度面積便攜式流速超聲波測(cè)量?jī)x即便在槽或堰不適用、探頭被浸沒(méi)、滿管、過(guò)載或有逆流發(fā)生的地方 4250均可為您提供較高的測(cè)量精度，現(xiàn)場(chǎng)顯示和打印特點(diǎn) 打印顯示一體式結(jié)構(gòu) 帶有微處理器的數(shù)字探頭確保讀數(shù)穩(wěn)定（防止液位偏差） 無(wú)需量程校準(zhǔn)現(xiàn)場(chǎng)一點(diǎn)校準(zhǔn) 沒(méi)有溫度漂移 自動(dòng)修正泥沙液位 對(duì)各種不同的液體自動(dòng)增益控制 傳感器不受液位降低影響應(yīng)用場(chǎng)合 容量評(píng)價(jià) 入流和滲流研究 下水道溢流研究 生活污水評(píng)估 明渠流量測(cè)量技術(shù)參數(shù)液位測(cè)量方法浸入式壓力傳感液位測(cè)量范圍0.015至3.05m，可延伸至0.015-9.14m液位準(zhǔn)確性 0.008/m速度測(cè)量方法多普勒超聲波方法頻率500KHz速度范圍-1.5至6.1m/s速度準(zhǔn)確性-1.5至1.5m/s， 0.03m/s，1.5至6.1m/s, 2%模塊存儲(chǔ)溫度-40~60℃操作溫度-18 ～60℃電源12～14VDC防護(hù)等級(jí)IP65數(shù)據(jù)存儲(chǔ)間隔1分鐘到120分鐘可選擇模塊尺寸40.6＊29.2＊26.7cm溫度影響 0.0027m/℃標(biāo)準(zhǔn)傳感器尺寸16.8＊4.1＊3.0cm標(biāo)準(zhǔn)傳感器重量0.96kg電纜線長(zhǎng)7.6m，可延長(zhǎng)至15.2mThesensorontheIsco4250usespatentedDopplertechnologytodirectlymeasureaveragevelocityintheflowstream.Anintegralpressuretransducermeasuresliquiddepthtodetermineflowarea.The4250thencalculatesflowratebymultiplyingtheareaoftheflowstreambyitsaveragevelocity.The4250givesyougreateraccuracyinapplicationswhereweirsorflumesarenotpractical,orwheresubmerged,fullpipe,surchargedandreverseflowconditionsmayoccur.Withareavelocityyoudon thavetoestimatetheslopeandroughnessofthechannel.AndIsco sexclusive500kHzDopplerpenetratesfartherintodeepflowstreamsthan1MHzsystems,whoseshorterwavelengthcancausethemtogive nearsighted velocitymeasurementintypicalwastewaterapplications.TheDopplersystemcontinuouslyprofilestheflowstream,eliminatingprofilingandcalibrationrequiredbyelectromagneticsystems.StandardFeatures4200Series-Built-inflowconversionsformostapplications,includingManningformula,datapoints,orequationforspecialsituations.-Setupwithorwithoutacomputer.Allsetupfunctionscanbedoneeitherviaonboardkeypadandtwo-linex80-characterbacklitLCD,orbyconnectiontoPCwithFlowlinksoftware.-Built-indotmatrixprintergivesyouanaccurate,on-siteprintout-Internalmemorystoresover2monthsofflow,rainfall,parameter,andsampledataat15minuteintervals.-OutputsforSampleractivation,alarmoutputs-Inputsforconnectionto674RainGaugeandmultiparameterwaterqualitysonde,4250AreaVelocity-SealedArea-Velocitysensorresistsfoulingbyoilandgrease.Streamlinedshapeshedsdebris.-Choiceofstandard(10ft)andextended(30ft)levelmeasurementrange.ApplicationsAccurateopenchannelflowmeasurementwithoutaweirorflumePretreatmentComplianceStormwaterRunoffMonitoringPermitEnforcementSewerFlowMonitoringCombinedSewerOverflowStudiesInflowandInfiltrationStudiesRiverandStreamGaugingOptionsandAccessoriesChoiceofStandardandLowProfileAreaVelocitySensors.-StandardSensorisrecommendedforlargerpipesandturbidflowswithhighconcentrationsofsuspendedsolidsandentrainedair.-LowProfileSensorisrecommendedforshallowsflows,typicallydownto1 (25mm).Optionaltelephonemodem-providesremotedataretrieval,voicemessaging,anddial-outalarmconditionsAnalogOutputs-upto3isolatedinternal4-20mAoutputsMountingringsforinstallationofprobeinroundpipesfrom6to15inchesindiameterNon-resettabletotalizer674RainGauge581RTDdataretrievaldevicedownloadsupto20meters201pHmoduleaddspHandtemperaturemeasurement/loggingYSI600Multi-ParameterWaterQualityMonitorSuspensionequipment(tohangflowmeterinmanhole)SpecificationsSize(HxWxD):17.0x11.5x10.5in.(43x29x26.7cm)(withoutpowersource)Weight:17.3lbs(7.8kg)(withoutpowersource)Material:High-impactmoldedpolystyrenestructuralfoamEnclosure:NEMA4X(iP65)Power:12to14VDC,14mAaverageat12.5VDCTypicalBatteryLife(printersetat1in/hr,1minutelevelreadinginterval,5minutevelocityreadinginterval)934Nickel-CadmiumBattery:8to11days946Lead-AcidBattery:12to16days948Lead-AcidBattery:2 to3monthsProgramMemory:Non-volatile,programmableflash.Updateablewithoutopeningenclosure.Display:BacklitLCD,2-line,80-character(5.5mmhighx3.2mmwide)Level-to-AreaConversionsChannelshapes:Round,U-shaped,rectangular,trapezoidalDatapoints:Foursetsof50level-areapointsLevel-to-FlowRateConversionsWeirs:V-notch,rectangular,CipollettiFlumes:Parshall,Palmer-Bowlus,Leopold-Lagco,Trapezoidal,H,HS,HLManningFormula:Round,U-channel,rectangular,trapezoidalDataPoints:Foursetsof50level-flowratepointsEquation:Two-termpolynomialTotalizersLCD:Total,forward,andreverseflow;9digitseach,floatingdecimalpoint,resettableMechanical(optional):Totalflow,7digits,non-resettableAreaVelocitySensor(Seeseparatespecificationsforlow-profilesensor)Size(LxWxH):6.6x1.6x1.2inches(16.8x4.1x3.0cm)Weight,incl.cable:2.1lbs(0.96kg)forstandardprobewith25footcable;3.9lbs(1.8kg)forextendedrangeprobewith50ftcable.AmbientOperatingTemperatureRange:0 to140 F(-18 to60 C)CompensatedTemperatureRange:32 to140 F(0 to60 C)Materials:Polybutadiene-basedpolyurethane,stainlesssteel;PVCandCPVCcableVelocityMeasurementMethod:DopplerUltrasonic,500kHzVelocityrange:-5to+20ft/s(-1.5to6.1m/s)LevelMeasurementMethod:SubmergedpressuretransducerStandardrangeprobe:measurementrange0.05to10ft(0.015to3.05m);maxlevel20ft(6.1m)Extendedrangeprobe:measurementrange0.05to30ft(0.015to9.14m);maxlevel40ft(12.2m)Standardprobeaccuracy(Non-linearity,repeatability,andhysteresisat25 C(77 F).Maxerrorforindicatedlevelrange.0.033to5.0ft(0.01to1.52m): 0.008ft/ft( 0.008m/m) 5.0ft( 1.52m): 0.012ft/ft( 0.012m/m)Extendedprobeaccuracy(Non-linearity,repeatability,andhysteresisat25 C(77 F).Maxerrorforindicatedlevelrange.0.05to15ft(0.015to4.57m): 0.03ft( 0.009m)0.05to21ft(0.015to6.4m): 0.09ft( 0.027m)0.05to30ft(0.015to9.14m): 0.3ft( 0.09