资源描述：
《ISA 71.04-1985Environmental Conditions for PMCS Airborne Contaminants》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。
1、STANDARDISA–71.04–1985FormerlyISA–S71.04–1985EnvironmentalConditionsforProcessMeasurementandControlSystems:AirborneContaminantsApproved3February1986TMISATheInstrumentation,–Systems,andAutomationSocietyISA-71.04-1985,EnvironmentalConditionsforProcessMeasurementandControlSystems:AirborneContaminantsIS
2、BN0-87664-895-2CopyrightË1985bytheInstrumentSocietyofAmerica.Allrightsreserved.PrintedintheUnitedStatesofAmerica.Nopartofthispublicationmaybereproduced,storedinaretrievalsystem,ortransmittedinanyformorbyanymeans(electronic,mechanical,photocopying,recording,orotherwise),withoutthepriorwrittenpermissi
3、onofthepublisher.ISA67AlexanderDriveP.O.Box12277ResearchTrianglePark,NorthCarolina27709PrefaceThisprefaceisincludedforinformationalpurposesandisnotpartofISA-71.04-1985.ThisstandardhasbeenpreparedaspartoftheserviceintheISAtowardagoalofuniformityinthefieldofinstrumentation.Tobeofrealvalue,thisdocument
4、shouldnotbestatic,butshouldbesubjecttoperiodicreview.Towardthisend,theSocietywelcomesallcommentsandcriticisms,andasksthattheybeaddressedtotheSecretary,StandardsandPracticesBoard,ISA,67AlexanderDrive,P.O.Box12277,ResearchTrianglePark,NC27709,Telephone(919)549-8411,e-mail:standards@isa.org.TheISAStand
5、ardsandPracticesDepartmentisawareofthegrowingneedforattentiontothemetricsystemofunitsingeneral,andtheInternationalSystemofUnits(SI)inparticular,inthepreparationofinstrumentationstandards.TheDepartmentisfurtherawareofthebenefitstoU.S.A.usersofISAstandardsofincorporatingsuitablereferencestotheSI(andth
6、emetricsystem)intheirbusinessandprofessionaldealingswithothercountries.Towardthisend,thisDepartmentwillendeavortointroduceSI-acceptablemetricunitsinallnewandrevisedstandardstothegreatestextentpossible.TheMetricPracticeGuide,whichhasbeenpublishedbytheInstituteofElectricalandElectronicsEngineersasANSI
7、/IEEEStd.268-1982,andfuturerevisionswillbethereferenceguidefordefinitions,symbols,abbreviations,andconversionfactors.ItisthepolicyoftheISAtoencourageandwelcometheparticipationofallconcernedindividuals
