PT878超聲波流量計原理與安裝課件

超聲波的概念與書語及超聲波流量計測量的原理PT878液體超聲波流量計的組成PT878液體超聲波流量計安裝考慮因素PT878液體超聲波流量計的故障判斷PT878液體超聲波流量計的操作超聲波的概念與書語及超聲波流量計測量的原理超聲波的概念與書語頻率:次聲波 0to20Hz聲波 20Hzto20kHz(Humanhearing)超聲波 >20kHz超聲波的概念超聲波的概念與書語超聲波的概念傳感器工作原理

傳感器電能

機械能機械能

電能壓電晶體的變化每個傳感器能發(fā)射和接受發(fā)射接收傳感器工作原理傳感器發(fā)射接收超聲波流量計原理：時差法傳感器既發(fā)送信號又接收信號V

tup=超聲波被流體減速

tdn=超聲波被流體加速tuptdnttupdn>

tttupdn=-DtPc-Vsinup=qtPc+Vsindn=qV

LP

聲信號傳播時間逆流傳播,tup順流傳播,tdn超聲波流量計原理：時差法傳感器既發(fā)送信號又接收VtupV

LP聲速

c=

Ptavg,ttt2avg=

dnup+Q = Velocity

AreaQ = V

A體積流量tt

tttupdnupdn>=-DtPc-VsintPc+Vsinupdn==qq流速

V

C2L2≈

×Δt超聲波流量計原理：時差法VLP聲速c=Ptavg,ttt2avg夾裝式傳感器

折射原理Snell’sLawc1 = 傳感器內(nèi)傳播速度c2 = 管壁的傳播速度c3 = 流體內(nèi)的傳播速度S = 傳感器的間距c1

1c2

2

3c3LSW.T.Classic“clamp-on”approach夾裝式傳感器c1 = 傳感器內(nèi)傳播速度c11c2PT878液體超聲波流量計的組成1主機傳感器信號線充電器紅外線轉(zhuǎn)RS232測厚探頭偶合劑儀器包PT878液體超聲波流量計的組成1主機PT878液體超聲波流量計的組成21.OKS傳感器夾具2.CRS和CPT傳感器夾具3.CF-LP傳感器夾具PT878液體超聲波流量計的組成21.OKS傳感器夾具所配傳感器的特性及用途傳感器代碼型號C-RS402C-RS401C-PT116CF-LP23OKSSpecial(91)形狀頻率1.0MHz0.5MHz1.0MHz4.0MHz2.0MHz發(fā)射角度42423559.5傳播時間17.320.327.55.85傳播速度248424842674.63328使用溫度-40to150C-40to150C-20to210C-40to230C-200to360C所配傳感器的特性及用途傳感器代碼C-RSC-RSC-PTCF傳感器選用原則1.溫度要求.2.信號要求.導聲較差的介質(zhì)和大的管道選擇低頻探頭.3.精度要求.頻率越高精度越高.2寸以下一般用CF-LP探頭.傳感器選用原則1.溫度要求.管道要求1.直管段要求:前10后5.即在傳感器安裝位置前10倍直徑長度和后5倍的直徑長度無彎頭,閥門等引起流體擾動的裝置.2.準確測量管經(jīng)外徑周長或直徑.3.確定管道材質(zhì)和壁厚及接觸溫度.4.確定是否有內(nèi)襯及種類和厚度.管道要求1.直管段要求:前10后5.即在傳感器安裝位置前10介質(zhì)要求1.已列出的介質(zhì)直接選擇2.未列出的介質(zhì)需輸入聲速或選擇跟蹤窗口測試3.確定聲速的目的是在窗口中央將信號檢出..ENDOFTRANSMITGOODSNRWINDOW介質(zhì)要求1.已列出的介質(zhì)直接選擇ENDOFTRANSMI安裝方式1.根據(jù)管道大小和信號強度選擇安裝方式A.單聲程:大管道和復雜應用B:雙聲程:首選方式,安裝簡單.C:多聲程:小管道,信號特強.安裝位置:水平管道3點和9點位置垂直管道必須是介質(zhì)向上流安裝方式1.根據(jù)管道大小和信號強度選擇安裝方式測量管道的直徑和壁厚一般在傳感器安裝位置測量五個直徑,平均值用超聲波測厚儀測量八個點的厚度,取平均值測量管道的直徑和壁厚一般在傳感器安裝位置測量五個直徑,平均值單聲程傳感器的安裝(側視)單聲程傳感器的安裝(側視)單聲程傳感器的安裝(側視)單聲程傳感器的安裝(側視)單聲程傳感器的安裝(側視)單聲程傳感器的安裝(側視)單聲程傳感器的安裝(側視)單聲程傳感器的安裝(側視)單聲程傳感器的安裝(俯視)單聲程傳感器的安裝(俯視)單聲程傳感器的安裝(俯視)單聲程傳感器的安裝(俯視)雙聲程傳感器的安裝(側視)雙聲程傳感器的安裝(側視)雙聲程傳感器的安裝(側視)雙聲程傳感器的安裝(側視)雙聲程傳感器的安裝(側視)雙聲程傳感器的安裝(側視)雙聲程傳感器的安裝(俯視)雙聲程傳感器的安裝(俯視)雙聲程傳感器的安裝(俯視)雙聲程傳感器的安裝(俯視)傳感器的安裝傳感器的安裝傳感器的安裝傳感器的安裝PT878超聲波流量計原理與安裝課件校準1.標定后輸入校驗系數(shù)2.雷諾數(shù)修正.Re = 雷諾數(shù)#V = 流體流速ID = 內(nèi)徑

= 運動粘度 (ft2/secorm2/sec)校準1.標定后輸入校驗系數(shù)進行信號診斷介質(zhì)充滿管道后需檢測的參數(shù)和信號流向是否正常信號強度SSup;SSdn聲速SNSP波型等根據(jù)診斷參數(shù)調(diào)整有關輸入?yún)?shù)得到準確結果進行信號診斷介質(zhì)充滿管道后需檢測的參數(shù)和信號進行信號診斷信號強度SSup;SSdn50-55偏低可能不穩(wěn)定55-60低一點,可以接受60-65好65-75非常好75-99信號飽和,分辨率可能降低0.電纜線開路100.控制器故障聲速SNSP應在合理范圍內(nèi).如水1500m/s左右進行信號診斷信號強度SSup;SSdn進行信號診斷錯誤代碼E0:無錯誤E1:信號太低E2:聲速錯誤E3:流速超出范圍E4:信號質(zhì)量太差E5:流速變化太大進行信號診斷錯誤代碼FeaturesLarge,BacklitLCDSimplifiedKeypadGraphicalUserInterface(GUI)FasterUpdateRateImprovedPeakDetectionLarger,morepowerfulDataLoggerXML-formatSiteFilesFlashmemory–SimpleUpgradesPT878UltrasonicFlowmeterIrDA?-compatiblewirelessdatatransferUpto11hoursruntimeperchargeFeaturesPT878UltrasonicFlowmLCDDisplay240x200resolutionRoomfor1to4measurementsLargesignalwaveformdisplaysWhiteELBacklightPT878UltrasonicFlowmeterLCDDisplayPT878UltrasonicFlLCDDisplay240x200resolutionRoomfor1to4measurementsLargesignalwaveformdisplaysWhiteELBacklightPT878UltrasonicFlowmeterLCDDisplayPT878UltrasonicFlKeypadRubberizedkeysClickactionSimpleuniversallayout"Soft"FunctionKeysPT878UltrasonicFlowmeterKeypadPT878UltrasonicFlowmetGraphicalUserInterface(GUI)KeepsrelatedinformationtogetherAllchoicesvisibleatthesametimePT878UltrasonicFlowmeterGraphicalUserPT878UltrasonicGUIControlsMenusRelateditemsgroupedtogetherUse

tomovethroughchoicesUse

tochangemenusPressEnter

toselectPT878UltrasonicFlowmeterGUIControlsPT878UltrasonicFGUIControlsTabsQuickaccesstorelatedformsUse

toselectformPressEntertoopentheformPT878UltrasonicFlowmeterGUIControlsPT878UltrasonicFGUIControlsButtonsSelectsbetweenmutuallyexclusivechoicesUse

toselectbuttonPressEntertoactivatePT878UltrasonicFlowmeterGUIControlsPT878UltrasonicFPT878UltrasonicFlowmeterGUIControlsListsChoosefromallapplicablesettingsUse

tomoveoneitemUse

toscrollthelistPT878UltrasonicFlowmeterGUIPT878UltrasonicFlowmeterGUIControlsNumericEntryPressEntertobeginenteringdigitsPress

toeraseadigitPressEsctocancelandrestoreoriginalvaluePressEntertoacceptthenewvalueValuescanbeenteredordisplayedineitherMetricorEnglishunitswithouthavingtochangemeterdefaultsPT878UltrasonicFlowmeterGUIPT878UltrasonicFlowmeterGUIControlsCheckBoxesUsedtoturnanoption:On

Off

PressEntertotogglePT878UltrasonicFlowmeterGUIGUIControlsFunctionKeysChangeaccordingtoformormenuactivePressF1,F2,orF3

toselectPT878UltrasonicFlowmeterGUIControlsPT878UltrasonicFGUIControlsLocale-SpecificChangedate,time,anddecimalformatsforlocalcustom:MM/DD/YYYYDD-MM-YYYYYYYY-MM-DD11:59PM23:59123.45123,45PT878UltrasonicFlowmeterGUIControlsPT878UltrasonicFDataLogger1Megabytestorage>100,000recordsFrom1to12itemsperlogMultiplelogscanrunsimultaneouslyLogintervalfrom1secondto99minutesProgrammableStartandEndDate/TimeCyclicLogsErrorlogsPT878UltrasonicFlowmeterDataLoggerPT878UltrasonicFlFlashMemoryInstallnewprograminminutesoverIRNoEPROMstochangePT878UltrasonicFlowmeterFlashMemoryPT878UltrasonicFIrDA

-CompatibleWirelessCommunicationsInfrareddatatransferUpto115KbpsUpto1meterrange"Drag&Drop"filetransfersAutomaticNosettingsNocableadaptersrequiredPT878UltrasonicFlowmeterIrDA-CompatibleWirelessPT8BatteryNiMHrechargeable9to11hourruntime(longerthanNiCd)6hourrechargeNoneofthememoryproblemsassociatedwithNiCdFewerchargecyclesthanNiCdNiCdperformsbetterincoldNiCdordisposableAAalkalinecellscanbeusedinsteadofNiMHPT878UltrasonicFlowmeterBatteryPT878UltrasonicFlowmeBatteryContinuousbatterylevelgaugeSimpleiconindicateschargeUniversalcharger100-250VACPT878UltrasonicFlowmeterBatteryPT878UltrasonicFlowmeBatteryRuntimeupto11hours,dependingonfeaturesselected.Runtimeisreducedby:ProlongeduseofthebacklightLoop-powered4-20mAtransmittersHighresistanceloadson4-20mAoutputRuntimeisincreasedby:UsingSleepmodePT878UltrasonicFlowmeterBatteryPT878UltrasonicFlowmePT878UltrasonicFlowmeterEnvironmentalMeetsIP67ratingWithstandssubmersioninwaterDurablepolymer"boot"PreventsdamageifdroppedIntegratedwirestandPT878UltrasonicFlowmeterEnviPT878UltrasonicFlowmeterMeterSetupSelectUnitsSelectTransducerSelectPipeSelectLiningSelectFluidAdjustPathCorrectionFactorsSavetoaSitePT878UltrasonicFlowmeterMetePT878UltrasonicFlowmeterSelectUnitsThePT878candefaulttoeitherMetricorEnglishunits.FromtheMetermenu,selectUnits.PressOKtousethenewsettings.PT878UltrasonicFlowmeterSelePT878UltrasonicFlowmeterSelectTransducerSelectWettedorClamp-onChooseTransducerfromListListonlyshowsapplicabletransducersAllparametersfilledinautomaticallyChoose"SPECIAL"toentercustomerparametersAllowseachparametertobespecifiedPT878UltrasonicFlowmeterSelePT878UltrasonicFlowmeterSelectPipeSelectPipeMaterialfromListPipeSoundSpeedautomaticallyfilledinSelect"OTHER"forunlistedmaterialEnterSoundSpeedEnterDimensionsOuterDiameter(OD)orCircumference(ODxPI)WallthicknessPT878UltrasonicFlowmeterSelePT878UltrasonicFlowmeterSelectPipeIfpipematerialhasaschedule,IDcanbeusedtoautomaticallyenterdimensions.UsesANSI(English)orDIN(metric)schedule.ScheduleMaterials:StainlessSteelCarbonSteelCastIronPVCCPVCPT878UltrasonicFlowmeterSelePT878UltrasonicFlowmeterSelectLiningChooseliningmaterialfromlist,or"Other"tospecifyLiningoptionisnotavailablewhenusingWettedtransducersPT878UltrasonicFlowmeterSelePT878UltrasonicFlowmeterSelectFluidEnable/DisableTrackingWindowsUseforfluidswithunknownorhighlyvariablesoundspeedSpecifyminimumandmaximumsoundspeedChoosefluidfromlistor"Other"forunlistedfluidIffluidnotlisted,specifythenominalsoundspeedonlyPT878UltrasonicFlowmeterSelePT878UltrasonicFlowmeterSelectFluidForEnergyapplicationswithwaterasfluid,specifythe%GlycolconcentrationPT878UltrasonicFlowmeterSeleAdjustPathForclamp-on,PathlengthPandAxiallengthLareautomaticallycalculated.Selectthenumberoftraverses.Spacingisautomaticallyrecalculated.Spacingcanbechangedbyenteringanewvalue.PT878UltrasonicFlowmeterAdjustPathPT878UltrasonicFlFinishUpYourchangeswill

not

takeeffectuntilyou:Press

OK

tokeepallchangesPress

CANCEL

todiscardallchangesPT878UltrasonicFlowmeterFinishUpPT878UltrasonicFlowCorrectionFactorsReynoldsCorrectionUseasinglevalueforKineticViscosity(K/V).TableoptionisnotavailablePT878UltrasonicFlowmeterCorrectionFactorsPT878UltrasCorrectionFactorsK-FactorCorrectionUseasinglevalueforK-FactormultiplierUseaTabletorelateK-Factortoanothermeasure.OnlyVelocitycanbeusedtointerpolatetheK-Factor.PT878UltrasonicFlowmeterCorrectionFactorsPT878UltrasSavetoaSiteFileTokeepthenewsettings,youmustsavethemtoaSiteFile:Choose"SaveNow"toreplacethesettingsinthecurrentsite.Choose"Manager"tocreateanewsite.PT878UltrasonicFlowmeterSavetoaSiteFilePT878UltraSiteManagerUsetheSiteManagerto:Savesettingstoanewsite.Useandexistingsite.Deletesites.Renamesites.PrintorTransfersites.PT878UltrasonicFlowmeterSiteManagerPT878UltrasonicFSiteManagerOpentheSiteManagermenubypressing

Menu,

Enter.ChooseSaveAstonamethesiteandstoreit.PT878UltrasonicFlowmeterSiteManagerPT878UltrasonicFSiteManagerEnterafilenameofupto8characters:Usearrowstomovearoundthegrid.Press

Enter

toselectthecharacter.Use

Delete

toeraseacharacter.Press

OK

whendone.Hint:AdescriptiveSiteMessagecanbeenteredfromtheSiteMenuPT878UltrasonicFlowmeterSiteManagerHint:AdescriptiSiteFilesUpto32sitesstoredinPT878Canbetransferredto/fromPCforunlimitedcapacitySoftwareversionsneedtomatchtoensurecompatibilityXML*FormatFilesprintasshownhere

SomeoutputsarecodedSet-upsarebestviewedthroughameterSiteFilesshouldnotbeeditedwithaPCorlaptop*eXtensibleMarkupLanguage

<PipeMaterial='5'Sound_Speed='3120.0'