PT878超聲波流量計(jì)原理與安裝課件

超聲波的概念與書語(yǔ)及超聲波流量計(jì)測(cè)量的原理PT878液體超聲波流量計(jì)的組成PT878液體超聲波流量計(jì)安裝考慮因素PT878液體超聲波流量計(jì)的故障判斷PT878液體超聲波流量計(jì)的操作超聲波的概念與書語(yǔ)及超聲波流量計(jì)測(cè)量的原理超聲波的概念與書語(yǔ)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(yǔ)超聲波的概念傳感器工作原理

傳感器電能

機(jī)械能機(jī)械能

電能壓電晶體的變化每個(gè)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(jì)原理：時(shí)差法傳感器既發(fā)送信號(hào)又接收信號(hào)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(hào)傳播時(shí)間逆流傳播,tup順流傳播,tdn超聲波流量計(jì)原理：時(shí)差法傳感器既發(fā)送信號(hào)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(jì)原理：時(shí)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(jì)的組成1主機(jī)傳感器信號(hào)線充電器紅外線轉(zhuǎn)RS232測(cè)厚探頭偶合劑儀器包PT878液體超聲波流量計(jì)的組成1主機(jī)PT878液體超聲波流量計(jì)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(jì)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(hào)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(shí)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(hào)要求.導(dǎo)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(zhǎng)度和后5倍的直徑長(zhǎng)度無(wú)彎頭,閥門等引起流體擾動(dòng)的裝置.2.準(zhǔn)確測(cè)量管經(jīng)外徑周長(zhǎng)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(cè)試3.確定聲速的目的是在窗口中央將信號(hào)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(hào)強(qiáng)度選擇安裝方式A.單聲程:大管道和復(fù)雜應(yīng)用B:雙聲程:首選方式,安裝簡(jiǎn)單.C:多聲程:小管道,信號(hào)特強(qiáng).安裝位置:水平管道3點(diǎn)和9點(diǎn)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(hào)強(qiáng)度選擇安裝方式測(cè)量管道的直徑和壁厚一般在傳感器安裝位置測(cè)量五個(gè)直徑,平均值用超聲波測(cè)厚儀測(cè)量八個(gè)點(diǎn)的厚度,取平均值測(cè)量管道的直徑和壁厚一般在傳感器安裝位置測(cè)量五個(gè)直徑,平均值單聲程傳感器的安裝(側(cè)視)單聲程傳感器的安裝(側(cè)視)單聲程傳感器的安裝(側(cè)視)單聲程傳感器的安裝(側(cè)視)單聲程傳感器的安裝(側(cè)視)單聲程傳感器的安裝(側(cè)視)單聲程傳感器的安裝(側(cè)視)單聲程傳感器的安裝(側(cè)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(cè)視)雙聲程傳感器的安裝(側(cè)視)雙聲程傳感器的安裝(側(cè)視)雙聲程傳感器的安裝(側(cè)視)雙聲程傳感器的安裝(側(cè)視)雙聲程傳感器的安裝(側(cè)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(jì)原理與安裝課件校準(zhǔn)1.標(biāo)定后輸入校驗(yàn)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(yùn)動(dòng)粘度 (ft2/secorm2/sec)校準(zhǔn)1.標(biāo)定后輸入校驗(yàn)系數(shù)進(jìn)行信號(hào)診斷介質(zhì)充滿管道后需檢測(cè)的參數(shù)和信號(hào)流向是否正常信號(hào)強(qiáng)度SSup;SSdn聲速SNSP波型等根據(jù)診斷參數(shù)調(diào)整有關(guān)輸入?yún)?shù)得到準(zhǔn)確結(jié)果進(jìn)行信號(hào)診斷介質(zhì)充滿管道后需檢測(cè)的參數(shù)和信號(hào)進(jìn)行信號(hào)診斷信號(hào)強(qiáng)度SSup;SSdn50-55偏低可能不穩(wěn)定55-60低一點(diǎn),可以接受60-65好65-75非常好75-99信號(hào)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(yīng)在合理范圍內(nèi).如水1500m/s左右進(jìn)行信號(hào)診斷信號(hào)強(qiáng)度SSup;SSdn進(jìn)行信號(hào)診斷錯(cuò)誤代碼E0:無(wú)錯(cuò)誤E1:信號(hào)太低E2:聲速錯(cuò)誤E3:流速超出范圍E4:信號(hào)質(zhì)量太差E5:流速變化太大進(jìn)行信號(hào)診斷錯(cuò)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

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