MIL-PRF-123C
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来源:标准资料网
MIL-PRF-123C, PERFORMANCE SPECIFICATION, CAPACITORS, FIXED, CERAMIC DIELECTRIC, (TEMPERATURE STABLE AND GENERAL PURPOSE), HIGH RELIABILITY, GENERAL SPECIFICATION FOR (27 MAR 2003)., This specification covers the general requirements for high reliability, general purpose (BX and BR) and temperature stable (BP and BG) ceramic dielectric fixed capacitors, leaded and nonleaded for space, missile, and other high reliability applications. Capacitors covered by this specification may be used in critical frequency determining applications, timing circuits, and other applications where absolute stability is required (BP and BG), and in applications where appreciable variations in capacitance with respect to temperature, voltage, frequency, and life can be tolerated (BX and BR). Life tests in this specification are performed at two times rated voltage at maximum rated temperature, and an assumed acceleration factor of 8:1 is used to relate life test data obtained at two times rated voltage to performance at rated voltage
【英文标准名称】:StandardTestMethodforMeasuringBulkDensityValuesofPowdersandOtherBulkSolidsasFunctionofCompressiveStress
【原文标准名称】:测量粉末和其他散装固体松密度的标准试验方法.压应力的作用
【标准号】:ASTMD6683-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:D18.24
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:bulkdensity;bulksolids;compressivestress;powder;Bulkdensity;Bulksolids;Compactionpressure;Powders;Silos
【摘要】:Thedatafromthistestcanbeusedtoestimatethebulkdensityofmaterialsinbinsandhoppersandformaterialhandlingapplicationssuchasfeeders.Thetestresultscanbegreatlyaffectedbythesampleselectedfortesting.Formeaningfulresultsitisnecessarytoselectarepresentativesampleoftheparticulatesolidwithrespecttomoisture(water)content,particle-sizedistributionandtemperature.Forthetestsanappropriatesizesampleshouldbeavailable,andfreshmaterialshouldbeusedforeachindividualtestspecimen.Initialbulkdensity,(x03C1;b)initial,mayormaynotbeusedastheminimumbulkdensity.Thiswilldependonthematerialbeingtested.Forexample,thetwoareoftenclosetothesameforcoarse(mostparticleslargerthanabout6mm),free-flowingbulksolids,butnotforfine,aeratablepowders.Bulkdensityvaluesmaybedependentuponthemagnitudeoftheappliedmassincrements.Traditionally,theappliedmassisdoubledforeachincrementresultinginanappliedmassincrementratioof1.Smallerthanstandardincrementratiosmaybedesirableformaterialsthatarehighlysensitivetotheappliedmassincrementratio.Anexampleofthelatterisamaterialwhosebulkdensityincreases10%ormorewitheachincreaseinappliedmass.Bulkdensityvaluesmaybedependentuponthedurationofeachappliedmass.Traditionally,thedurationisthesameforeachincrementandequalto15s.Forsomematerials,therateofcompressionissuchthatcompletecompression(nochangeinvolumewithtimeatagivenappliedcompressivestress)willrequiresignificantlymorethan15s.Note18212;Thequalityoftheresultproducedbythisstandardisdependentonthecompetenceofpersonnelperformingit,andthesuitabilityoftheequipmentandfacilitiesused.AgenciesthatmeetthecriteriaofPracticeD3740aregenerallyconsideredcapableofcompetentandobjectivetesting/sampling/inspection/etc.UsersofthisstandardarecautionedthatcompliancewithPracticeD3740doesnotinitselfassurereliableresults.Reliableresultsdependonmanyfactors;PracticeD3740providesameansofevaluatingsomeofthosefactors.PracticeD3740wasdevelopedforagenciesengagedinthetestingorinspection(orboth)ofsoilandrock.Assuchitisnottotallyapplicabletoagenciesperformingthisstandard.However,usersofthisstandardshouldrecognizethattheframeworkofPracticeD3740isappropriateforevaluatingthequalityofanagencyperformingthisstandard.Currentlythereisnoknownqualifyingnationalauthoritythatinspectsagenciesthatperformthisstandard.1.1Thistestmethodcoversanapparatusandprocedurefordeterminingarangeofbulkdensitiesofpowdersandotherbulksolidsasafunctionofcompressivestress.1.2Thistestmethodshouldbeperformedinthelaboratoryundercontrolledconditionsoftemperatureandhumidity.1.3AllobservedandcalculatedvaluesshallconformtotheguidelinesforsignificantdigitsandroundingestablishedinPracticeD6026.1.3.1Theproceduresusedtospecifyhowdataarecollected/recordedorcalculatedinthisstandardareregardedastheindustrystandard.Inaddition,theyarerepresentativeofthesignificantdigitsthatgenerallyshouldberetained.Theproceduresuseddonotconsidermaterialvariation,purposeforobtainingthedata,specialpurposestudies,oranyconsiderationsfortheuserx2019;sobjectives,anditiscommonpracticetoincreaseorreducesignificantdigitsofreporteddatatobecommensuratewiththesecon......
【中国标准分类号】:A42
【国际标准分类号】:19_120
【页数】:5P.;A4
【正文语种】:英语
基本信息
| 标准名称： | 国境口岸储存场地卫生监督规程 |
| 英文名称： | Codes of sanitary supervision for storage field at frontier port |
| 替代情况： | 替代SN/T 1318-2003 |
| 发布部门： | 国家质量监督检验检疫总局 |
| 发布日期： | 2009-07-07 |
| 实施日期： | 2010-01-16 |
| 首发日期： | |
| 作废日期： | |
| 主管部门： | 国家认证认可监督管理委员会 |
| 提出单位： | 国家认证认可监督管理委员会 |
| 归口单位： | 国家认证认可监督管理委员会 |
| 起草单位： | 中华人民共和国天津出入境检验检疫局 |
| 起草人： | 谭绪良、周君野、吕智军、赵诚、高伟 |
| 出版社： | 中国标准出版社 |
| 出版日期： | 2010-01-16 |
| 页数： | 8页 |
适用范围
本标准规定了国境口岸储存场地卫生监督的要求、程序、结果判定及处置。
本标准适用于国境口岸储存场地的卫生监督。
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