1、Designation:E123412Standard Practice forHandling,Transporting,and Installing Nonvolatile Residue(NVR)Sample Plates Used in Environmentally ControlledAreas for Spacecraft1This standard is issued under the fixed designation E1234;the number immediately following the designation indicates the year ofor
2、iginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice covers the handling,transporting,andinstalling of samp
3、le plates used for the gravimetric determina-tion of nonvolatile residue(NVR)within and between facili-ties.1.2 The values stated in SI units are to be regarded as thestandard.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibili
4、ty of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2E1235 Test Method for Gravimetric Determination of Non-volatile Residue(NVR)in Environmentally Contr
5、olledAreas for Spacecraft2.2 ISO Standards:14644-1,CleanroomsandAssociatedControlledEnvironmentsPart 1:Classification of Air Cleanliness314644-2,CleanroomsandAssociatedControlledEnvironmentsPart 2:Specifications for Testing andMonitoring to Prove Continued Compliance with ISO14644-132.3 U.S.Federal
6、Standard:FED-STD-209E Airborne Particulate Cleanliness Classes inCleanrooms and Clean Zones42.4 Institute of Environmental Sciences and Technology:IEST-RP-CC001.3,HEPA and ULPA Filters3IEST-RP-CC007.1,Testing ULPA Filters3IEST-RP-CC034.1,HEPA and ULPA Filter Leak Tests3IEST-STD-CC1246,Product Cleanl
7、iness Levels and Con-tamination Control Program32.5 American National Standards Institute:ANSI/ASMEB46.1-2009,SurfaceTexture(SurfaceRoughness,Waviness,and Lay)53.Terminology3.1 Definitions:3.1.1 ISO Class N(airborne particulate cleanliness class),nlevel of airborne particulate concentrations as defi
8、ned inISO 14644-1 and 14644-2,where 10Nis the maximumallowable concentrations(particles per cubic metre).3.1.1.1 DiscussionThe considered particle sizes(lowerthreshold values)applicable for classification with ISO14644-1 are limited to the range from 0.1 through 5 m.Particles larger than 5 m(macropa
9、rticles)may be expressed inaccordance with Annex E of ISO 14644-1.3.1.2 FS209,nthe level of cleanliness specified by themaximum allowable number of particles per cubic foot of air asdefined in FED-STD-209E.3.1.2.1 DiscussionThis is provided for information and tofacilitate the transition to the use
10、of the ISO classificationstandard(ISO 14644-1).3.1.3 cleanarea,nageneraltermthatincludescleanrooms,controlled areas,good housekeeping areas,andother areas that have contamination control by physical designand specified operating procedures.3.1.4 clean zone,na defined space in which the contami-natio
11、n is controlled to meet specified cleanliness levels.3.1.5 contaminant,nunwanted molecular and particulatematter that could affect or degrade the performance of thecomponents upon which they reside.3.1.6 contamination,na process of contaminating.1This practice is under the jurisdiction of ASTM Commi
12、ttee E21 on SpaceSimulation and Applications of Space Technology and is the responsibility ofSubcommittee E21.05 on Contamination.Current edition approved Nov.1,2012.Published November 2012.Originallyapproved in 1988.Last previous edition approved in 2007 as E1234 07.DOI:10.1520/E1234-12.2For refere
13、nced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from Institute of Environmental Sciences and Technology,940 E.Nort
14、hwest Highway,Mount Prospect,IL 60056.4Available from Institute of Environmental Sciences and Technology,940 E.Northwest Highway,Mount Prospect,IL 60056,and U.S.government sources.5Available from American Society of Mechanical Engineers,United Engineer-ing Center,345 E.47th St.,New York,NY 10017.Cop
15、yright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.1.7 controlled area,nan environmentally controlledarea,operated as a cleanroom,but without the final stage ofHEPA(or better)filters used in cleanrooms.3.1.7.1 DiscussionOnly rough filters(50
16、to 60%effi-ciency)and medium efficiency filters(80 to 85%efficiency)are required for a controlled area.The maximum allowableairborne particle concentrations are ISO Class 8.5(FS209Class 283 000)area for particles 0.5 m and ISO Class 8(FS209 Class 100 000)for particles 5.0 m.3.1.8 environmentally controlled areas,ncleanrooms,controlled areas,good housekeeping areas,and other enclo-sures that are designed to protect products from contamination.3.1.8.1 DiscussionCleanliness is achieved by controlli
