SAE J1409 Air Brake Valves Test Procedure
作者:标准资料网 时间:2024-04-30 04:22:57 浏览:8405
来源:标准资料网
Product Code:SAE J1409
Title:Air Brake Valves Test Procedure
Issuing Committee:Truck And Bus Brake Supply And Control Components Committee
Scope:This SAE Recommended Practice establishes uniform test procedures for air brake systems pneumatic valves with respect to:a. Input-Output Performance b. Leakage Characteristics c. Low Temperature Evaluationd. Elevated Temperature Evaluatione. Corrosion Resistance Evaluationf. Endurance Testingg. Structural Integrityh. Vibration Testing
【英文标准名称】:Ambientairquality-StandardgravimetricmeasurementmethodforthedeterminationofthePM2,5massfractionofsuspendedparticulatematter
【原文标准名称】:环境空气质量.悬浮颗粒物质的PM2.5质量系数测定用标准称重测量法
【标准号】:BSEN14907-2005
【标准状态】:现行
【国别】:英国
【发布日期】:2005-11-11
【实施或试行日期】:2005-11-11
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:空气污染;空气净化;空气质量;环境空气;定义;测定;尘埃;称重测量法;重量分析法;维修;质量浓度;测量;测量不确定度;测量仪器;颗粒;颗粒物质的测定;质量保证;质量控制;基准测量方法;抽样方法;悬浮尘埃;称重
【英文主题词】:Airpollution;Airpurification;Airquality;Ambientair;Definitions;Determination;Dust;Gravimetric;Gravimetry;Maintenance;Massconcentration;Measurement;Measuringincertainity;Measuringinstruments;Particles;Particulatemattermeasurement;Qualityassurance;Qualitycontrol;Referencemeasuringmethods;Samplingmethods;Suspendeddust;Weighing
【摘要】:ThisEuropeanStandarddescribesastandardmethodfordeterminingthePM2,5massconcentrationofsuspendedparticulatematterinambientairbysamplingtheparticulatematteronfiltersandweighingthembymeansofabalance.Measurementsaremadeoverasamplingperiodofabout24h,andinlinewiththeDirective,areexpressedasμg/m3,wherethevolumeofairisthevolumeatambientconditionsneartheinletatthetimeofsampling.Therangeofapplicationofthestandardisfrom1μg/m3(i.e.thelimitofdetectionofthestandardmeasurementmethodexpressedasitsuncertainty)upto120μg/m3(i.e.themaximumconcentrationlevelobservedduringthefieldstudyundertakenbyCEN/TC264/WG15tovalidatethestandard).NOTEAlthoughthestandardisnotvalidatedforconcentrationsover120μg/m3,itsrangeofapplicationcouldwellbeextendedtocommonlyencounteredambientconcentrationsuptocirca200μg/m3whenusingglassorquartzfibrefilters.Atthesehighconcentrationsandparticulatemassloadingsnofiltercloggingistobeexpected.Alsotheflowratecanbeeasilymaintainedatthenominalsetting.TheequivalenceprocedureinAnnexAspecifiestwoapproaches,dependingonwhetherthecandidatemethoddiffersslightlyorfundamentallyfromthestandardmethod.Intheformercase,involvingonlyslightdifferencesfromthestandardmethod(“variationsonatheme”)AnnexAprovidesarestrictedproceduretocompareonlythepertinentdifferences,insteadofafullfieldtest.Thispartoftheannexservestogivepracticalguidancefordeterminingequivalenceformeasurementmethodscommonlyusedinmonitoringnetworks,andincludesexamplesofcommonvariationstothestandardmethod,suchasdifferentfilterstoringorconditioningproceduresandthevariationofthestandardmethodfortheapplicationasautomatedfilterchanger.Inthelattercase,involvingafullsetoffieldtests,theprocedureservestodetermineequivalenceonlywithintherangeofconditionsunderwhichthefieldtestsarecarriedout.TheequivalencecanbeshowntoholdforconditionsprevailingwithinEuropeancountriesbycarryingoutthefieldtestinsituationscoveringasuitablerangeofrelevantambientparameters(suchasconcentrationandcompositionofthesuspendedparticulatematter,temperature,andhumidity).AlthoughthisEuropeanStandarddoesnotexplicitlyaddressautomaticmonitoringmethodsforthemeasurementofthePM2,5massfractioninambientair,theequivalencetestprocedureinAnnexAappliesbothtonon-automaticandautomaticmethods.
【中国标准分类号】:Z15
【国际标准分类号】:13_040_20
【页数】:32P;A4
【正文语种】:英语
基本信息
| 标准名称： | 斜块式测微仪检定器检定规程 |
| 英文名称： | Verification Regulation of Wedge-feet Calibrator for Micrometers |
| 中标分类： |
综合 >>
计量 >>
长度计量 |
| 替代情况： | JJG 525-1988 |
| 发布部门： | 中华人民共和国国家质量监督检验检疫总局 |
| 发布日期： | 2002-04-15 |
| 实施日期： | 2002-07-01 |
| 首发日期： | |
| 作废日期： | |
| 归口单位： | 全国几何量工程参量计量技术委员会 |
| 起草单位： | 河南省计量测试研究所 |
| 起草人： | 任方平、贾晓杰、黄玉珠 |
| 出版社： | 中国计量出版社 |
| 出版日期： | 2004-04-19 |
| 页数： | 14页 |
| 书号： | 155026-1620 |
适用范围
本规程适用于斜块式测微仪检定器的首次检定和后续检定。
前言
没有内容
目录
没有内容
引用标准
没有内容
所属分类： 综合 计量 长度计量
