MIL-HDBK-765 (NOTICE 3), MILITARY HANDBOOK: GUIDELINES FOR SAFE DESIGN OF POLYPHASE ELECTRICAL SYSTEMS (28 SEP 2006) [NO S/S DOCUMENT]., MIL-HDBK-765, dated 24 October 2001, remains inactive for new design; however, the document is valid for use.
基本信息
| 标准名称： | 以太网交换机节能参数和测试方法 |
| 发布部门： | 中华人民共和国工业和信息化部 |
| 发布日期： | 2012-12-28 |
| 实施日期： | 2013-03-01 |
| 首发日期： | |
| 作废日期： | |
| 出版社： | 人民邮电出版社 |
| 出版日期： | 2013-03-01 |
适用范围
本部分规定了电信设备在不同运输条件下的环境适应性试验要求以及环境试验方法。运输条件不仅包括流通过程中的各种环境条件，同时也包括各种环境条件下的保护措施、装卸方式、地区划分和运输工具类别等。
本部分适用于水路、铁路、公路和航空等运输方式，其中包括运输过程中的装卸。
本部分不包括运输过程中的偶然性事故。
前言
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目录
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引用标准
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所属分类： 医药 卫生 劳动保护 医药 卫生 劳动保护综合 医学 医药卫生技术 医学科学和保健装置综合
【英文标准名称】:StandardPracticeforDeterminingVacuumChamberGaseousEnvironmentUsingaColdFinger
【原文标准名称】:用冷凝管测定真空室气态环境的标准实施规程
【标准号】:ASTME834-2004
【标准状态】:现行
【国别】:
【发布日期】:2004
【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】:E21.05
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:真空的;航空航天运输;试验;气体;环境;手指;气体的;煤气;航天技术
【英文主题词】:coldfinger;contaminationmonitoring;residualgascompositions;vacuumchamber
【摘要】:Whenappliedinthecaseinwhichthereisnotestiteminthevacuumchamber(suchasduringbake-outoperations),thisproceduremaybeusedtoevaluatetheperformanceofthevacuumchamberinrelationtootherdatafromthesameorotherchambersgiventhatcriticalparameters(forexample,lengthofexposure,temperatureofthechamberandcoldfinger,anisotropy,andsoforth)canberelated.Theprocedurecanbeusedtoevaluatetheeffectsofmaterialsfoundintheresidueonitemsplacedinthevacuumchamber.Theprocedurecanbeusedtodescribetheeffectofapriortestontheresidualgaseswithinavacuumchamber.Byselectingthetimeatwhichthecoolantisintroducedintothecoldfinger,theenvironmentpresentduringaselectedportionofatestcanbecharacterized.Thiscanbeusedtodeterminetherelativeefficacyofcertainvacuumchamberproceduressuchasbake-out.Theproceduremaybeusedtodefinetheoutgassedproductsofatestitemthatcondenseonthecoldfinger.Theproceduremaybeusedindefiningtherelativecleanlinessofavacuumchamber.Inapplyingtheresultsoftheproceduretothevacuumchamberingeneral,considerationmustbegiventotheanisotropyofthemolecularfluxeswithinthechamber.Theprocedureissensitivetoboththepartialpressuresofthegasesthatformthecondensiblesandthetimeofexposureofthecoldfingeratcoolanttemperatures.Theprocedureissensitivetoanylossesofsamplethatmayoccurduringthevarioustransferoperationsandduringthatprocedurewhereinthesolventisevaporatedbyheatingitonasteambath.Note18212;Reactionsbetweensolventandcondensatecanoccurandwouldaffecttheanalysis.1.1Thispracticecoversatechniqueforcollectingsamplesofmaterialsthatarepartoftheresidualgasenvironmentofanevacuatedvacuumchamber.Thepracticeusesadevicedesignatedasa"coldfinger"thatisplacedwithintheenvironmenttobesampledandiscooledsothatconstituentsoftheenvironmentareretainedonthecold-fingersurface.1.2Thepracticecoversamethodforobtainingasamplefromthecoldfingeranddeterminingtheweightofthematerialremovedfromthecoldfinger.1.3Thepracticecontainsrecommendationsastowaysinwhichthesamplemaybeanalyzedtoidentifytheconstituentsthatcomprisethesample.1.4Bydeterminingthespeciesthatconstitutethesample,thepracticemaybeusedtoassistindefiningthesourceoftheconstituentsandwhetherthesampleisgenerallyrepresentativeofsamplessimilarlyobtainedfromthevacuumchamberitself.1.5Thispracticecoversalternativeapproachesandusagestowhichthepracticecanbeput.1.6Thedegreeofmolecularfluxanisotropysignificantlyaffectstheassurancewithwhichonecanattributecharacteristicsdeterminedbythisproceduretothevacuumchamberenvironmentingeneral.1.7Thetemperatureofthecoldfingersignificantlyaffectsthequantityandspeciesofmaterialscollected.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Forspecificwarningstatements,seeSection.
【中国标准分类号】:J78
【国际标准分类号】:23_160
【页数】:5P.;A4
【正文语种】: