EN ISO 14257-2001 声学.工作室声响性能评价用工作室空间声音分布曲线的测量及参数描述(ISO14257:2001);德文版本ENISO14257:2001

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【英文标准名称】:Acoustics-Measurementandparametricdescriptionofspatialsounddistributioncurvesinworkroomsforevaluationoftheiracousticalperformance(ISO14257:2001);GermanversionENISO14257:2001
【原文标准名称】:声学.工作室声响性能评价用工作室空间声音分布曲线的测量及参数描述(ISO14257:2001);德文版本ENISO14257:2001
【标准号】:ENISO14257-2001
【标准状态】:现行
【国别】:
【发布日期】:2002-03
【实施或试行日期】:
【发布单位】:欧洲标准学会(EN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:计量学;噪声测量;人类工效学;分布曲线;特性;发射;磨损量;测量;数学计算;规范(验收);职业安全;使用;工作地点;声压级;应用;测量技术;噪声降低;声音传播;排放;机械噪声;声源;保健;定义;噪声抑制;铸模;辐射;声学;噪声辐射;噪声(环境的);声音;声学测量;噪声控制;噪声;工作场所
【英文主题词】:Acousticmeasurement;Acoustics;Applications;Definition;Definitions;Distributioncurves;Emissions;Ergonomics;Healthprotection;Machinenoise;Mathematicalcalculations;Measurement;Measuringtechniques;Metrology;Modelling;Noise;Noiseabatement;Noisecontrol(acoustic);Noiseemissions;Noise(environmental);Noisemeasurements;Noisereduction;Occupationalsafety;Properties;Sound;Soundpressurelevel;Soundpropagation;Soundsources;Specification(approval);Use;Wear-quantity;Workspaces;Workingplaces
【摘要】:
【中国标准分类号】:A42
【国际标准分类号】:17_140_01
【页数】:30P.;A4
【正文语种】:英语


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【英文标准名称】:Toolholdersforindexableinserts--Designation
【原文标准名称】:可转位刀片柄的名称与符号
【标准号】:JISB4125-1990
【标准状态】:作废
【国别】:日本
【发布日期】:1990-05-01
【实施或试行日期】:1990-05-01
【发布单位】:日本工业标准调查会(JISC)
【起草单位】:FactoryAutomation
【标准类型】:()
【标准水平】:()
【中文主题词】:镶齿;符号;可转位刀片;名称与符号;刀具夹持装置
【英文主题词】:tool-holdingdevices;indexableinserts;inserts(cuttingtools);symbols;designations
【摘要】:
【中国标准分类号】:J41
【国际标准分类号】:25_100_01
【页数】:10P;A4
【正文语种】:日语


【英文标准名称】:StandardTestMethodforOn-LinepHMeasurementofWaterofLowConductivity
【原文标准名称】:在线测量低导电水pH的标准试验方法
【标准号】:ASTMD5128-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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】:D19.03
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:highpurity;lowconductivity;on-line;pH;Acidity,alkalinity,pH--water;Automatedprocedures--wateranalysis;Calibration--wateranalysisinstrumentation;Conductanceandconductivity(electrical)--water;Fieldtesting--water;Low-conductivitywate
【摘要】:pHmeasurementsaretypicallymadeinsolutionsthatcontainrelativelylargeamountsofacid,base,ordissolvedsalts.Undertheseconditions,pHdeterminationsmaybemadequicklyandprecisely.Continuouson-linepHmeasurementsinwatersamplesoflowconductivityaremoredifficult(4,5).Theselowionicstrengthsolutionsaresusceptibletocontaminationfromtheatmosphere,samplestreamhardware,andthepHelectrodes.Variationsintheconstituentconcentrationoflowconductivitywaterscauseliquidjunctionpotentialshifts(see3.1.1)resultinginpHmeasurementerrors.Theaggressivenatureandthehighelectricalresistanceofpureandultra-pure,lowconductivitywatersmaydegradethepHmeasurementelectrodesresultinginunstableanddriftingpHoutputsignals.Itisessentialtomakeon-linepHmeasurementsoflowconductivitywaterasaccuratelyaspossibletodeterminethepropercontrolofpHadjustmentchemicals,theeffectivenessofdemineralizerequipment,theeventandnatureofimpuritycontaminationofthewater,andinformationpertainingtotheoverallstatusofthepurewatersystem.1.1Thistestmethodcoversthepreciseon-linedeterminationofpHinwatersamplesofconductivitylowerthan100x03BC;S/cm(seeTable1andTable2)overthepHrangeof3to11(seeFig.1),underfieldoperatingconditions,utilizingasealed,non-refillable,referenceelectrode.pHmeasurementsofwateroflowconductivityareproblematicalforconventionalpHelectrodes,methods,andrelatedmeasurementapparatus.1.2ThistestmethodincludestheproceduresandequipmentrequiredforthecontinuouspHmeasurementoflowconductivitywatersamplestreamsincludingtherequirementsforthecontrolofsamplestreampressure,flowrate,andtemperature.Foroff-linepHmeasurementsinlowconductivitysamples,refertoTestMethodD5464.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.TABLE1CalculatedConductivityandpHValuesat25x00B0;CofLowConcentrationsofNaOHinPureWaterANote18212;ThistabletabulatesthetheoreticalconductivityandpHvaluesoflowlevelsofNaOHinpurewaterascalculatedfromavailablethermodynamicdata.Note28212;ToillustratethehighsensitivityofthesamplepHattheselowconcentrationstocontaminants,thelastcolumnlistserrorsthatwouldresultifthesamplewerecontaminatedwithanadditional1mg/Lthroughsampleorequipmenthandlingerrors.SampleConcentration,mg/LSampleConductivity,x03BC;S/cmSamplepHx0394;pHErrorfromAdditional1mg/LNaOHContaminate0.001
0.055
7.05
x0394;2.35
0.010
0.082