【英文标准名称】:Electroacoustics-Audiometricequipment-Part6:Instrumentsforthemeasurementofotoacousticemissions
【原文标准名称】:电声学.听力测定设备.第6部分:听觉发射的测量仪器
【标准号】:IEC60645-6-2009
【标准状态】:现行
【国别】:国际
【发布日期】:2009-04
【实施或试行日期】:
【发布单位】:国际电工委员会(IX-IEC)
【起草单位】:IEC/TC29
【标准类型】:()
【标准水平】:()
【中文主题词】:声学的;声信号;声学试验;声学;调节;听度;听力图;听力学;听力计;听力测定;听觉阈;校准;仪器的分类;可比性;比较分析法;比较测量;定义;诊断;耳;电气工程;电声学;电医学;排放;排放测量;等效性;头戴送受话器;听力试验;听觉;高频;文字书写;扬声器;测量;测量条件;测量仪器;测量系统;医用电子学;医疗技术学;听觉的;物理性能;测头;探子(医疗器械);射频设备;额定值;短期测量;信号电平;声级;声音传播;声换能器;规范(验收);测试信号;试验
【英文主题词】:Acoustic;Acousticsignals;Acoustictesting;Acoustics;Adjustments;Audiobility;Audiograms;Audiology;Audiometers;Audiometry;Auditorythreshold;Calibration;Classesofapparatus;Comparability;Comparisonanalysis;Comparisonmeasurement;Definitions;Diagnosis;Ears;Electricalengineering;Electroacoustics;Electromedicine;Emission;Emissionmeasurement;Equivalence;Headphones;Hearingabilitytests;Hearing(auditoryperception);Highfrequencies;Letterings;Loudspeakers;Measurement;Measurementconditions;Measuringinstruments;Measuringsystems;Measuringtechniques;Medicalelectronics;Medicaltechnology;Otoacoustic;Physicalproperties;Probes;Probes(medicalinstruments);Radiofrequencyapparatus;Ratings;Short-termmeasurement;Signallevel;Soundlevels;Soundpropagation;Soundtransducer;Specification(approval);Testsignals;Testing
【摘要】:
【中国标准分类号】:N65
【国际标准分类号】:13_140;17_140_50
【页数】:32P;A4
【正文语种】:英语


【英文标准名称】:StandardPracticeforConditionMonitoringofUsedLubricantsbyTrendAnalysisUsingFourierTransformInfrared(FT-IR)Spectrometry
【原文标准名称】:傅里叶变换红外线(FT-IR)光谱测定法通过趋势分析监测使用过的润滑剂状态的标准实施规程
【标准号】:ASTME2412-2010
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D02.96
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:additivepackages;basestockdegradation;conditionmonitoring;contamination;Fouriertransforminfrared;FT-IR;fuel;glycol;infrared;IR;lubricatingoils;nitration;oxidation;petroleumbasedextremepressurelubricants;petroleumlubricants;polyo
【摘要】:Periodicsamplingandanalysisoflubricantshavelongbeenusedasameanstodetermineoverallmachineryhealth.Atomicemission(AE)andatomicabsorption(AA)spectroscopyareoftenemployedforwearmetalanalysis(forexample,TestMethodD5185).Anumberofphysicalpropertytestscomplementwearmetalanalysisandareusedtoprovideinformationonlubricantcondition(forexample,TestMethodsD445,D2896,andD6304).MolecularanalysisoflubricantsandhydraulicfluidsbyFT-IRspectroscopyproducesdirectinformationonmolecularspeciesofinterest,includingadditives,fluidbreakdownproductsandexternalcontaminants,andthuscomplementswearmetalandotheranalysesusedinaconditionmonitoringprogram(1,3-7).1.1ThispracticecoverstheuseofFT-IRinmonitoringadditivedepletion,contaminantbuildupandbasestockdegradationinmachinerylubricants,hydraulicfluidsandotherfluidsusedinnormalmachineryoperation.Contaminantsmonitoredincludewater,soot,ethyleneglycol,fuelsandincorrectoil.Oxidation,nitrationandsulfonationofbasestocksaremonitoredasevidenceofdegradation.Theobjectiveofthismonitoringactivityistodiagnosetheoperationalconditionofthemachinebasedonfaultconditionsobservedintheoil.MeasurementanddatainterpretationparametersarepresentedtoallowoperatorsofdifferentFT-IRspectrometerstocompareresultsbyemployingthesametechniques.1.2Thispracticeisbasedontrendinganddistributionresponseanalysisfrommid-infraredabsorptionmeasurements.Whilecalibrationtogeneratephysicalconcentrationunitsmaybepossible,itisunnecessaryorimpracticalinmanycases.Warningoralarmlimits(thepointwheremaintenanceactiononamachinebeingmonitoredisrecommendedorrequired)canbedeterminedthroughstatisticalanalysis,historyofthesameorsimilarequipment,roundrobintestsorothermethodsinconjunctionwithcorrelationtoequipmentperformance.Thesewarningoralarmlimitscanbeafixedmaximumorminimumvalueforcomparisontoasinglemeasurementorcanalsobebasedonarateofchangeoftheresponsemeasured(1).Thispracticedescribesdistributionsbutdoesnotprecludeusingrate-of-changewarningsandalarms.Note18212;Itisnottheintentofthispracticetoestablishorrecommendnormal,cautionary,warningoralertlimitsforanymachinery.Suchlimitsshouldbeestablishedinconjunctionwithadviceandguidancefromthemachinerymanufacturerandmaintenancegroup.1.3Spectraanddistributionprofilespresentedhereinareforillustrativepurposesonlyandarenottobeconstruedasrepresentingorestablishinglubricantormachineryguidelines.1.4Thispracticeisdesignedasafast,simplespectroscopiccheckforconditionmonitoringofin-servicelubricantsandcanbeusedtoassistinthedeterminationofgeneralmachineryhealththroughmeasurementofpropertiesobservableinthemid-infraredspectrumsuchaswater,oiloxidation,andothersasnotedin1.1.Theinfrareddatageneratedbythispracticeistypicallyusedinconjunctionwithothertestingmethods.Forexample,infraredspectroscopycannotdeterminewearmetallevelsoranyothertypeofelementalanalysis.Thepracticeaspresentedisnotintendedforthepredictionoflubricantphysicalproperties(forexample,viscosity,totalbasenumber,totalacidnumber,etc.).Thisprac......
【中国标准分类号】:E34
【国际标准分类号】:75_100
【页数】:24P.;A4
【正文语种】:英语