ANSI/NECA 303-2005 闭路电视(CCTV)系统安装标准
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来源:标准资料网
【英文标准名称】:StandardforInstallingClosed-CircuitTelevision(CCTV)Systems
【原文标准名称】:闭路电视(CCTV)系统安装标准
【标准号】:ANSI/NECA303-2005
【标准状态】:现行
【国别】:美国
【发布日期】:2005-03-09
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:NECA
【标准类型】:()
【标准水平】:()
【中文主题词】:电缆分线系统;电路;装配;闭路电视;闭路的
【英文主题词】:installation;closed;cableddistributionsystems;closed-circuittelevision;circuits
【摘要】:Thisstandarddescribesinstallationproceduresforclosed-circuittelevisionsystemequipmentinstalledforprotectionofbuildinginteriors,buildingperimeter,andsurroundingproperty.Thispublicationappliestoclosed-circuittelevisionsystemsforsecurityandmonitoringactivitiesinnonhazardouslocationsbothindoorsandoutdoors.Italsocoversperiodicroutinemaintenanceproceduresforclosed-circuittelevisionsystems.Thispublicationappliestothefollowing:1.Closed-circuittelevisioncameras2.Monitors,switchers,multiplexers,andrecordingdevices3.Electronichardwarecomponents4.Conductorandcableinstallation.
【中国标准分类号】:M73
【国际标准分类号】:33_160_40;13_310
【页数】:
【正文语种】:英语
【英文标准名称】:Roofingproductsfrommetalsheet-Specificationforfullysupportedroofingproductsofaluminiumsheet
【原文标准名称】:金属屋面板.铝制全支撑屋顶产品规范
【标准号】:BSEN507-2000
【标准状态】:现行
【国别】:英国
【发布日期】:2000-01-15
【实施或试行日期】:2000-01-15
【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】:坡屋顶;厚度;半成品;质量保证;带材;铝合金;屋顶;包装;作标记;尺寸公差;建筑系统构件;铝;预制配件;性能试验;屋顶层;薄板材;尺寸;名称与符号;有机覆层;试样;全支撑屋顶;储存;覆层;层覆材料;卷材
【英文主题词】:
【摘要】:ThisEuropeanStandardspecifiesrequirementsforroofingproductsusedforassemblyintocoveringsforpitchedroofs,madefromaluminiumsheetwithorwithoutadditionalorganiccoatings.Thestandardestablishesgeneralcharacteristics,definitionsandlabellingoftheproducts,togetherwithrequirementsforthematerialsfromwhichtheproductscanbemanufactured.Itisintendedtobeusedeitherbymanufacturerstoensurethattheirproductscomplywiththerequirementsorbypurchaserstoverifythattheproductscomplybeforetheyaredespatchedfromthefactory.Itspecifiestherequirementsforproductswhichenablethemtomeetallnormalserviceconditions.Productscanbeprefabricatedorsemiformedproductsaswellasstrip,coilandsheetforon-site-formedapplications(e.g.standingseamroofs).Thestandardappliestoalldiscontinuouslylaidandfullysupportedroofingproductsmadeofaluminiumsheets.Norequirementsforsupportingconstruction,designofroofsystemandexecutionofconnectionsandflashingsareincluded.NOTEThestandarddealspartlywithflatproducts,partlywithpreformed(prefabricated)products.Requirementsforpreformedself-supportingproductsaregiveninprEN508-2.
【中国标准分类号】:P26
【国际标准分类号】:77_150_10;91_060_20
【页数】:12P;A4
【正文语种】:英语
【英文标准名称】:StandardPracticeforEvaluatingCompatibilityofBinaryMixturesofLubricatingGreases
【原文标准名称】:润滑脂的二元混合物的相容性评估的标准实施规程
【标准号】:ASTMD6185-2010
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【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】:D02.G0.01
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:binarymixtures;compatibility;incompatibility;lubricatinggrease;mixtures;Binarymixtures;Compatibility--petroleumproducts;Compositionanalysis--petroleumproducts;Incompatibility;Lubricatinggrease
【摘要】:Thecompatibilityofgreasescanbeimportantforusersofgrease-lubricatedequipment.Itiswellknownthatthemixingoftwogreasescanproduceasubstancemarkedlyinferiortoeitherofitsconstituentmaterials.Oneormoreofthefollowingcanoccur.Amixtureofincompatiblegreasesmostoftensoftens,sometimesexcessively.Occasionally,itcanharden.Inextremecases,thethickenerandliquidlubricantwillcompletelyseparate.Bleedingcanbesoseverethatthemixedgreasewillrunoutofanoperatingbearing.Excessivesyneresiscanoccur,formingpoolsofliquidlubricantseparatedfromthegrease.Droppingpointscanbereducedtotheextentthatgreaseorseparatedoilrunsoutofbearingsatelevatedoperatingtemperatures.Sucheventscanleadtocatastrophiclubricationfailures.Becauseofsuchoccurrences,equipmentmanufacturersrecommendcompletelycleaningthegreasefromequipmentbeforeinstallingadifferentgrease.Servicerecommendationsforgrease-lubricatedequipmentfrequentlyspecifythecaveatx2013;donotmixgreasesunderanycircumstances.Despitethisadmonition,greasemixingwilloccurand,attimes,cannotbeavoided.Insuchinstances,itwouldbeusefultoknowwhetherthemixingoftwogreasescouldleadtoinadequatelubricationwithdisastrousconsequences.Equipmentusersmostoftendonothavetheresourcestoevaluategreasecompatibilityandmustrelyontheirsuppliers.Mixingofgreasesisahighlyimprudentpractice.Greaseandequipmentmanufacturersalikerecognizesuchpracticeswilloccurdespiteallwarningstothecontrary.Thus,bothusersandsuppliershaveaneedtoknowthecompatibilitycharacteristicsofthegreasesinquestion.Therearetwoapproachestoevaluatingthecompatibilityofgreasemixtures.Oneistodeterminewhethersuchmixturesmeetthesamespecificationrequirementsastheconstituentcomponents.Thisapproachisnotaddressedbythispractice.Instead,thispracticetakesaspecification-independentapproach;itdescribestheevaluationofcompatibilityonarelativebasisusingspecifictestmethods.Threetestmethodsareusedbecausefewerarenotsufficientlydefinitive.Forexample,inonestudy,using100000-strokeworkedpenetrationforevaluation,62%ofthemixtureswerejudgedtobecompatible.Inahigh-temperaturestoragestabilitystudy,coveringabroaderspectrumofgreasetypes,onlyone-thirdofthemixtureswerecompatible.Thesestudiesuseddifferentcriteriatojudgecompatibility.Compatibilitycannotbepredictedwithcertaintyfromforeknowledgeofgreasecomposition.Generally,greaseshavingthesameorsimilarthickenertypeswillbecompatible.Uncommonly,evengreasesofthesametype,althoughnormallycompatiblewhenmixed,canbeincompatiblebecauseofincompatibleadditivetreatments.Thus,compatibilityneedstobejudgedonacase-by-casebasis.Twoconstituentgreasesareblendedinspecificratios.A50:50mixturesimulatesaratiothatmightbeexperiencedwhenonegrease(GreaseA)isinstalledinabearingcontainingapreviouslyinstalled,differentgrease(GreaseB),andnoattemptismadetoflushoutGreaseBwithGreaseA.The10:90and90:10ratiosareintendedtosimulateratiosthatmightoccurwhenattemptsaremadetoflushoutGreaseBwithGreaseA.Note18212;Somecompaniesevaluate25:75and75:25ratiomixturesinsteadof10:90and90:10ratiomixtures.But,thelattertworatios,whichareprescribedbythispractice,areconsideredmorerepresentativeoftheflushingpracticedescribedin5.3.Incompatibilityismostoftenrevealedbytheevaluationof50:50mixtures.However,insomeinstances50:50mixturesarecompatibleandmorediluteratiosareincompatib........
【中国标准分类号】:E36
【国际标准分类号】:75_100
【页数】:8P.;A4
【正文语种】:英语
