CEI NORME IEC INTERNATIONALE 68-5-2 INTERNATIONAL STANDARD Premiere edition First edition 1990-12 Essaisd'environnement Partie 5: Guidepourla redactiondes méthodes d'essais-Termesetdefinitions Environmentaltesting Part 5: Guidetodraftingof test methods- Terms and definitions IEC Numerodereference Referencenumber CEI/IEC68-5-2:1990 Validite dela présentepublication Validity ofthispublication Le contenutechniquedes publications de la CEI est cons- The technical contentof IEC publications is keptunder tamment revuparla CElafin quil reflete l'etatactuel de constant review bythe IEC,thus ensuring thatthecontent la technique. refflects current technology. Des renseignements relatifs a ladate dereconfirmation de Informationrelating to thedateofthe reconfirmationofthe la publication sontdisponiblesaupresduBureau Centralde publicationisavailablefromtheIECCentralOffice. laCEI. Les renseignements relatifs aces revisions,a 'etablis- Information on therevision work,the issueofrevised sement des editions révisées etaux amendements peuvent editions and amendmentsmaybeobtainedfrom IEC etreobtenusaupresdesComitésnationauxdelaCElet National CommitteesandfromthefollowingIEC dans les documents ci-dessous: sources: Bulletinde la CEI IECBulletin Annuaire de la CEI . . IEcYearbook Publieannuellement Published yearly Catalogue des publications de la CEl Catalogue of IEC publications . . Publie annuellement et mis a jour regulierement Published yearly with regular updates Terminologie Terminology Encequiconcemelaterminologiegenerale,lelecteurse Forgeneral terminology,readers are referred toIEc 5: reportera a la CEl 50:Vocabulaire Electrotechnique Inter- International ElectrotechnicalVocabulary(IEV),whichis national(VEl),qui sepresentesousfomedechapitres issued in the form of separate chapters eachdealing separes traitant chacun d'un sujet defini.Des detaits with a specificfield.FulldetailsoftheIEVwill be complets surle VEIpeuvent etre obtenus surdemande. supplied on request.Seealsothe lEC Multilingual Voir egalement le dictionnaire multilingue de la CEI. Dictionary. The terms and definitions contained in the present publi- Lestermesetdefinitionsfigurantdanslaprésentepubli- cationhave eitherbeen taken fromthe IEVorhavebeen cationontetesoittiresduVEl,soitspecifiquement approuves auxfinsdecette publication. Symboles graphiques et litteraux Graphicalandlettersymbols Pourlessymbolesgraphiques,les symboles itteraux etles For graphical symbols,and letter symbols and signs signes d'usagegeneralapprouves parla CEl,lelecteur approved by the IEC forgeneraluse,readers are referred to consultera: publications: la CEl 27:Symboles litteraux a utiliser en IEC 27:Letter symbols to be used in electrical electro-technique; technology: la CEl 417:Symboles graphiques utilisables IEC 417: Graphical symbols use - on sur le materiel. Index, releve et compilation des equipment. Index, survey and compilation of the feuilles individuelles; single sheets; laCEl617:Symbolesgraphiquespourschemas; IEC617:Graphical symbolsfordiagrams; . etpourlesappareils electromedicaux, andformedicalelectricalequipment, CEI 878: IEc 878:Graphical symbolsforelectromedical la Symboles graphiques pour equipmentinmedical practice. equipementselectriques enpratiquemedicale. Les symboles etsignes contenus dans la presente publi- The symbols and signs contained in the present publication cationontetesoitiresdela CEI27,dela CEI417,dela haveeitherbeentakenfromIEC27,IEC417,IEC617 CEI617et/oudelaCEI878,soitspecifiquementapprouves and/orIEC878,orhavebeenspecificallyapprovedforthe aux fins de cette publication. purpose of this publication. Publicationsdela CElétabliesparle IECpublicationspreparedbythesame meme comite d'etudes technicalcommittee L'attentiondu lecteur est attiree sur les listes figuranta la fin Theattentionof readers isdrawn tothe end pages ofthis decettepublication,quienumerentlespublicationsdela publication which listtheIEC publications issuedbythe CEl preparees parlecomite d'etudes qui a etab