MIL-A-5090E (NOTICE 1)
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MIL-A-5090E (NOTICE 1), MILITARY SPECIFICATION: ADHESIVES, HEAT RESISTANT, AIRFRAME STRUCTURAL, METAL TO METAL (22 OCT 1965) [INTERIM REVISION IN LIEU OF MIL-A-5090D] [S/S by MMM-A-132]., Specification MIL-A-O05090E(WP), dated 22 April 1963, is hereby canceled. Future procurement of Adhesives,Heat Resistant,Airframe Structural, Metal to Metal, should be made under Federal SpecificationMMM-A-132, Adhesives, Heat Resistant, Airframe Structural, Metal to Metal.
【英文标准名称】:StandardTestMethodforElectromagneticShieldingEffectivenessofDurableRigidWallRelocatableStructures
【原文标准名称】:耐久刚性壁浮动结构电磁屏蔽功效的标准试验方法
【标准号】:ASTME1851-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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】:E06.53
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:electromagneticmeasurements;electromagneticshieldedenclosures;magneticfield;planewave;shieldingeffectiveness;Electromagneticshielding;Magneticshields;Planewave;Rigidwallrelocatablestructures(RWRS);Shieldingeffectiveness
【摘要】:Thisstandardprovidesmeasurementproceduresfordeterminingtheelectromagneticshieldingeffectivenessofdurablerigidwallrelocatableshieldedenclosures.Thisstandardspecifiesamethodforcomparingtheshieldedenclosureperformanceofstructuresprovidedbydifferentsuppliers.Inaddition,thisstandardiswrittentominimizevariationsinmeasuredshieldingeffectivenessatagivenfrequencyandtestpointregardlessoftestpersonnel,equipment,andtestsite.Therefore,theshieldingeffectivenessofadurablerigidwallrelocatableshieldedenclosureofanysizefromanysuppliercanbedetermined.Thisstandardspecifiesaminimumsetofmeasurementsatagivenfrequencyandaminimumsetoffrequenciestodetermineshieldingeffectiveness.SourceFields8212;Performanceofashieldedenclosureistobeassessedfortwosourcefields:magneticandplanewave.MagneticFieldMeasurements8212;Theattenuationprovidedbyashieldedenclosureisassessedbyusingalocalsourcetogeneratethenearfield.Themagneticfieldmeasurementsarespecifiedfortwonarrowfrequencybands:140to160kHzand14to16MHz.PlaneWaveMeasurements8212;Theattenuationprovidedbyashieldedenclosureisassessedbyusingalocallygenerateddistantsourceorplanewavefield.Theplanewavemeasurementsarespecifiedforthreenarrowfrequencybands:300to500MHz,900to1000MHz,and8.5to10.5GHz.1.1Thistestmethodcoversthedeterminationoftheelectromagneticshieldingeffectivenessofdurablerelocatableshieldedenclosures.1.1.1Theintendedapplicationofthistestmethodisforvirginshieldedenclosuresthatdonothaveanyequipmentorequipmentracks.Itisrecommendedthattestsbeconductedbeforetheinteriorfinishworkbegins.However,theshieldassemblyincludingallenclosurepenetrationsshallbecompletedandrequiredpenetrationprotectiondevicesshallbeinstalledinaccordancewiththedesignspecification.Thetestmethodcanalsobeusedonexistingshieldedenclosuresafterrepairworkisdonetoverifyworkmanship,butitmaybenecessarytoremoveequipmentorequipmentrackstogainaccesstoatestarea.1.1.2Thetestproceduresdelineatedinthisdocumentarecomprehensiveandmayrequireseveraldaystocompleteforaroom-sizeshieldedenclosure.Ausercanapplythistestmethodforafirstarticletestthatrequiresproofofconceptandvalidationofdesignandfabricationtechnique.AppendixX2providesguidanceonchoosingtestpointssoshieldingeffectivenesstestsonaroom-sizeshieldedenclosuremaybecompletedinaboutone-halfdayforwhichitappliestoshieldedenclosurescomingoffanassemblyline.1.2Thistestmethodisforuseinthefollowingfrequencyranges:140to160kHz,14to16MHz,300to500MHz,900to1000MHz,and8.5to10.5GHz.Specifictestfrequencieswithintheserangesarerequired(see10.1.1and10.2.1).Additionalmeasurementsintherangeof10kHzto10.1.5.1GHzmaybeperformed.Forspecificapplications,thefrequencyrangemaybeextendedfrom50Hzto40GHz.AppendixX1providesguidanceonselectingmeasurementfrequencies.1.3Thistestmethodisnotapplicabletoindividualcomponentssuchasseparatewalls,floors,ceilings,orshieldedracks.1.4Thisstandardmayinvolvehazardousmaterials,operations,equipment,oranycombination.1.5ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesinparenthesesareforinformationonly.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.I......
【中国标准分类号】:P09
【国际标准分类号】:13_280
【页数】:15P.;A4
【正文语种】:英语
基本信息
| 标准名称： | ＨＳ５６３３型数字声级计 |
| 英文名称： | Digital sound levels for Type HS5633 |
| 中标分类： |
石油 >>
石油综合 >>
技术管理 |
| 发布部门： | 中华人民共和国电子工业部 |
| 发布日期： | 1991-04-02 |
| 实施日期： | 1991-07-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 2010-01-20 |
| 起草单位： | 机械电子工业部国营第4380厂 |
| 出版日期： | 1991-07-01 |
| 页数： | 15页 |
适用范围
本标准规定了HS 5633型数字声级计（以下简称“声级计”）的技术要求、测试方法、检验规则、包装贮存等要求。本标准适用于HS 5633型数字声级计，也适用于同类型的数字声级计（除技术要求外）。
前言
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引用标准
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所属分类： 石油 石油综合 技术管理
