BS ISO 1438-2008 液体比重测定法.使用薄壁堰的明渠流量测量
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【英文标准名称】:Hydrometry-Openchannelflowmeasurementusingthin-plateweirs
【原文标准名称】:液体比重测定法.使用薄壁堰的明渠流量测量
【标准号】:BSISO1438-2008
【标准状态】:现行
【国别】:英国
【发布日期】:2008-05-30
【实施或试行日期】:2008-05-30
【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】:明渠流量;流量测量;流量计;斜槽;公式;液体比重测定法;液体流量;数学计算;明渠;文杜利管;水;堰;堰(测量)
【英文主题词】:Channelflow;Flowmeasurement;Flowmeasurements;Flowmeters;Flumes;Formulae(mathematics);Hydrometry;Liquidflow;Mathematicalcalculations;Openchannels;Venturitubes;Water;Weirs;Weirs(measurement)
【摘要】:ThisInternationalStandarddefinestherequirementsfortheuseofrectangularandtriangular(V-notch)thinplateweirsforthemeasurementofflowofclearwaterinopenchannelsunderfreeflowconditions.Itincludestherequirementsfortheuseoffull-widthrectangularthin-plateweirsinsubmerged(drowned)flowconditions.
【中国标准分类号】:N12
【国际标准分类号】:17_120_20
【页数】:68P;A4
【正文语种】:英语
【英文标准名称】:Plastics-Verificationofpendulumimpact-testingmachines-Charpy,Izodandtensileimpact-testing
【原文标准名称】:塑料.摆锤冲击试验机的鉴定.Charpy,Izod和拉伸冲击试验
【标准号】:BSISO13802-1999
【标准状态】:现行
【国别】:英国
【发布日期】:1999-12-15
【实施或试行日期】:1999-12-15
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:ThisInternationalStandardspecifiesmethodsfortheverificationofpendulumimpact-testingmachinesusedfortheCharpyimpacttest,IzodimpacttestandtensileimpacttestdescribedinISO179-1,ISO180andISO8256,respectively.ThetestmachinescoveredbythisInternationalStandardareofthependulumtype.TheimpactenergyW(see3.12)absorbedinimpactingatestspecimenistakenasbeingequaltothedifferencebetweenthepotentialenergyE(see3.11)ofthependulumandtheenergyremaininginthependulumafterimpactingthespecimen.Theimpactenergyiscorrectedforfrictionandair-resistancelosses(seeTable2and5.6).Methodsaredescribedforverificationofthegeometricalandphysicalpropertiesofthedifferentpartsofthetestmachine.Theverificationofsomegeometricalpropertiesisdifficulttoperformontheassembledinstrument.ItisthereforeassumedthatthemanufacturerisresponsiblefortheverificationofsuchpropertiesandforprovidingreferenceplanesontheinstrumentthatenableproperverificationinaccordancewiththisInternationalStandard.Thesemethodsareforusewhenthemachineisbeinginstalled,isbeingrepaired,hasbeenmovedorisundergoingperiodicchecking.ThisInternationalStandardisapplicabletopendulum-typeimpact-testingmachines,ofdifferentcapacitiesand/ordesigns,withthegeometricalandphysicalpropertiesdefinedinclause5.Apendulumimpact-testingmachineverifiedinaccordancewiththisInternationalStandard,andassessedassatisfactory,isconsideredsuitableforimpacttestingwithunnotchedandnotchedtestspecimensofdifferenttypes.AnnexAdescribestherelationshipsbetweenthevariouscharacteristicpendulumlengths,thepotentialenergyandthemomentofinertiaofthependulum.AnnexBexplainshowtocalculatetheratioofframemasstopendulummassrequiredtoavoiderrorsintheimpactenergy.AnnexCdescribes,forCharpyimpacttesting,thechangesinpendulumvelocityjustafterimpactasafunctionofimpactenergyandgivestherangesofimpactenergiesforthemeasurementofwhichpendulumsofspecifiedcapacityhavetobeused.AnnexDdiscussesthestiffnessofthebaseoftheframenecessarytoavoidresonantoscillationsintheframeduetoreactionforcescausedbythemovingpendulum.AnnexEgivesthedimensionsofagaugeplatesuitablefortheverificationofCharpyimpact-testingmachines.
【中国标准分类号】:G31
【国际标准分类号】:83_200
【页数】:44P;A4
【正文语种】:英语
【英文标准名称】:Cablenetworksfortelevisionsignals,soundsignalsandinteractiveservices-Part6:Opticalequipment;GermanversionEN50083-6:1997
【原文标准名称】:电视信号、声音信号和交互服务电缆网络.第6部分:光学设备
【标准号】:DINEN50083-6-1998
【标准状态】:作废
【国别】:德国
【发布日期】:1998-06
【实施或试行日期】:1998-06-01
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:光波导;电气工程;放大器;插接件连接;光学仪器;定义;多路复接器;电视广播;测量方法;声音广播;多媒体;特性;电缆分布系统;测量技术;绝缘子;接收机;发射机;额定值;规范(验收);定向耦合器;测量;性能
【英文主题词】:
【摘要】:
【中国标准分类号】:M74
【国际标准分类号】:33_060_40
【页数】:45P;A4
【正文语种】:德语
