BS EN 175101-809-2000 电子元器件质量评定协调体系.详细规范.经过质量评定的符合CECC75101-801带短结构2.54mm格栅的印制电路板用两件式连接器详细规范
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【英文标准名称】:Harmonizedsystemofqualityassessmentforelectroniccomponents-Detailspecification-DetailSpecification:Two-partconnectorsforprintedboardshavingagridof2,54mm,shortversionincompliancewithCECC75101-801,withassessedquality
【原文标准名称】:电子元器件质量评定协调体系.详细规范.经过质量评定的符合CECC75101-801带短结构2.54mm格栅的印制电路板用两件式连接器详细规范
【标准号】:BSEN175101-809-2000
【标准状态】:作废
【国别】:英国
【发布日期】:2000-03-15
【实施或试行日期】:2000-03-15
【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】:尺寸;质量控制;电子设备及元件;试样;量规;印制电路板;详细规范;质量保证体系;电气元件;规范(验收);电气设备
【英文主题词】:electronicequipmentandcomponents;detailspecification;electricplugs;qualityassessmentsystems;printedcircuits;mountingcharacteristics;qualityassurancesystems
【摘要】:
【中国标准分类号】:L23
【国际标准分类号】:31_220_10
【页数】:40P;A4
【正文语种】:英语
【英文标准名称】:StandardPracticeforMeasurementofThicknessofAppliedCoatingPowderstoPredictCuredThickness
【原文标准名称】:测量实用涂层粉末预固化厚度的标准实施规程
【标准号】:ASTMD7378-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【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】:D01.51
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:角度测量;涂层;尺寸计量;线性测量;测量;计量学;粉末;表面特性;厚度
【英文主题词】:coatingpowder;coatingthickness;filmthickness;powdercoating;powderthickness;thicknessprediction;ultrasonic
【摘要】:Manyphysicalandappearancepropertiesofthefinishedcoatingareaffectedbythefilmthickness.Filmthicknesscanaffectthecolor,gloss,surfaceprofile,adhesion,flexibility,impactresistanceandhardnessofthecoating.Thefitofpiecesassembledaftercoatingcanbeaffectedwhenfilmthicknessisnotwithintolerance.Thereforecoatingsmustbeappliedwithincertainminimumandmaximumfilmthicknessspecificationstooptimizetheirintendeduse.Allproceduresinvolvetakingmeasurementsofappliedcoatingpowdersinthepre-cured,pre-gelledstatetohelpinsurecorrectcuredfilmthickness.Thisenablestheapplicationsystemtobesetupandfine-tunedpriortothecuringprocess.Inturn,thiswillreducetheamountofscrapandover-spray.Accuratepredictionshelpavoidstrippingandre-coatingwhichcancauseproblemswithadhesionandcoatingintegrity.Measurementsofcuredpowdercoatingthicknesscanbemadeusingdifferentmethodsdependinguponthesubstrate.Non-destructivemeasurementsovermetalsubstratescanbemadewithmagneticandeddycurrentcoatingthicknessgages(seePracticeD7091).Non-destructivemeasurementsovernon-metalsubstratescanbemadewithultrasoniccoatingthicknessgages(seeTestMethodD6132).Destructivemeasurementsoverrigidsubstratescanbemadewithcross-sectioninginstruments(seeTestMethodD4138).1.1Thispracticedescribesthethicknessmeasurementofdrycoatingpowdersappliedtoavarietyofsubstrates.Useofsomeoftheseproceduresmayrequirerepairofthecoatingpowder.Thispracticeisintendedtosupplementthemanufacturersinstructionsfortheoperationofthegagesandisnotintendedtoreplacethem.Itincludesdefinitionsofkeyterms,referencedocuments,thesignificanceanduseofthepractice,andtheadvantagesandlimitationsoftheinstruments.1.2Threeproceduresareprovidedformeasuringdrycoatingpowderthickness:1.2.1ProcedureA-Usingrigidmetalnotched(comb)gages.1.2.2ProcedureB-Usingmagneticoreddycurrentcoatingthicknessgages.1.2.3ProcedureC-Usingnon-contactultrasonicpowderthicknessinstruments.1.3Coatingpowdersgenerallydiminishinthicknessduringthecuringprocess.Theseproceduresthereforerequireareductionfactorbeestablishedtopredictcuredfilmthicknessofpowdercoatings.1.4ProcedureAandProcedureBmeasurethethickness(heightordepth)oftheappliedcoatingpowdersinthepre-cured,pre-gelledstate.Bycomparingresultstothemeasuredcuredpowderthicknessinthesamelocation,areductionfactorcanbedeterminedandappliedtofuturethicknessmeasurementsofthesamecoatingpowder.1.5ProcedureCresultsinapredictedthicknessvaluebasedonacalibrationfortypicalcoatingpowders.Ifthepowderinquestionisnottypicalthenacalibrationadjustmentcanbemadetoaligngagereadingswiththeactualcuredvaluesasdeterminedbyothermeasurementmethods.1.6ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:A29
【国际标准分类号】:17_040_20
【页数】:5P.;A4
【正文语种】:
基本信息
标准名称: | 民族弦鸣乐器通用技术条件 |
中标分类: |
轻工、文化与生活用品 >>
文教、体育、娱乐用品 >>
乐器 |
替代情况: | 被QB/T 1207.1-1999代替 |
发布日期: | |
实施日期: | 1992-02-01 |
首发日期: | |
作废日期: | |
出版日期: | |
页数: | 5页 |
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所属分类: 轻工 文化与生活用品 文教 体育 娱乐用品 乐器