1、2 68267CEI:1995 SOMMAIRE Pages AVANTPROPOS. 4 Articles 1 Domainedapplication. 6 2 Description 6 3 Descriptiondelappareillagedessai . 6 4 Svrits 8 5 Prconditionnement 10 6 Mesuresinitiales. 10 7 Epreuve 10 8 Mesuresintermdiaires. 12 9 Reprise. 12 10 Mesuresfinales 12 11 Renseignementsquedoitdonnerlas
2、pcificationparticulire 12 Annexes A Significationphysiquedelessai 14 B Appareillagedessaietmanipulation . 1668267IEC:1995 3 CONTENTS Page FOREWORD . 5 Clause 1 Scope. 7 2 Generaldescription 7 3 Descriptionoftestapparatus 7 4 Severities . 9 5 Preconditioning . 11 6 Initialmeasurements. 11 7 Testing .
3、 11 8 Intermediatemeasurements 13 9 Recovery 13 10 Finalmeasurements . 13 11 Informationtobegivenintherelevantspecification. 13 ANNEXES A Physicalsignificanceofthetest 15 B Testapparatusandhandling. 174 68267CEI:1995 COMMISSIONLECTROTECHNIQUEINTERNATIONALE _ ESSAISDENVIRONNEMENT Partie2:EssaisEssaiC
4、y:Essaicontinudechaleurhumide, essaiacclrapplicableenpremierlieuauxcomposants AVANTPROPOS 1) LaCEI(CommissionElectrotechniqueInternationale)estuneorganisationmondialedenormalisation composedelensembledescomitslectrotechniquesnationaux(ComitsnationauxdelaCEI).LaCEIa pourobjetdefavoriserlacooprationin
5、ternationalepourtouteslesquestionsdenormalisationdansles domainesdellectricitetdellectronique.Aceteffet,laCEI,entreautresactivits,publiedesNormes internationales.Leurlaborationestconfiedescomitsdtudes,auxtravauxdesquelstoutComit nationalintressparlesujettraitpeutparticiper.Lesorganisationsinternatio
6、nales,gouvernementaleset nongouvernementales,enliaisonaveclaCEI,participentgalementauxtravaux.LaCEIcollabore troitementaveclOrganisationInternationaledeNormalisation(ISO),selondesconditionsfixesparaccord entrelesdeuxorganisations. 2) LesdcisionsouaccordsofficielsdelaCEIconcernantdesquestionstechniqu
7、es,reprsentent,dansla mesuredupossible,unaccordinternationalsurlessujetstudis,tantdonnquelesComitsnationaux intressssontreprsentsdanschaquecomitdtudes. 3) Lesdocumentsproduitsseprsententsouslaformederecommandationsinternationales,ilssontpublis commenormes,rapportstechniquesouguidesetagrscommetelspar
8、lesComitsnationaux. 4) Danslebutdencouragerlunificationinternationale,lesComitsnationauxdelaCEIsengagentappliquer defaontransparente,danstoutelamesurepossible,lesNormesinternationalesdelaCEIdansleursnormes nationalesetrgionales.ToutedivergenceentrelanormedelaCEIetlanormenationaleourgionale correspon
9、dantedoittreindiqueentermesclairsdanscettedernire. 5) LaCEInafixaucuneprocdureconcernantlemarquagecommeindicationdapprobationetsa responsabilitnestpasengagequandunmatrielestdclarconformelunedesesnormes. 6) LattentionestattiresurlefaitquecertainsdeslmentsdelaprsenteNormeinternationalepeuventfaire lob
10、jetdedroitsdepropritintellectuelleoudedroitsanalogues.LaCEInesauraittretenuepour responsabledenepasavoiridentifidetelsdroitsdepropritetdenepasavoirsignalleurexistence. LanormeinternationaleCEI68267attablieparlesouscomit50B:Essaisclimatiques, ducomitdtudes50delaCEI:Essaisdenvironnement. Letextedecett
11、enormeestissudesdocumentssuivants: FDIS Rapportdevote 50B/360/FDIS 50B/373/RVD Lerapportdevoteindiqudansletableaucidessusdonnetouteinformationsurlevoteayant aboutilapprobationdecettenorme. LaCEI68comprendlespartiessuivantes,prsentessousletitregnral:Essais denvironnement. Premirepartie: Gnralitsetgui
12、de Deuximepartie: Essais Troisimepartie: Informationsdebase Quatrimepartie: Renseignementsdestinsauxrdacteursdespcifications Rsumsdessais Partie5: Guidepourlardactiondesmthodesdessais LesannexesAetBsontdonnesuniquementtitredinformation.68267IEC:1995 5 INTERNATIONALELECTROTECHNICALCOMMISSION _ ENVIRO
13、NMENTALTESTING Part2:TestsTestCy:Dampheat,steadystate, acceleratedtestprimarilyintendedforcomponents FOREWORD 1) TheIEC(InternationalElectrotechnicalCommission)isaworldwideorganizationforstandardization comprisingallnationalelectrotechnicalcommittees(IECNationalCommittees).TheobjecttotheIECisto prom
14、oteinternationalcooperationonallquestionsconcerningstandardizationintheelectricalandelectronic fields.Tothisendandinadditiontootheractivities,theIECpublishesInternationalStandards.Their preparationisentrustedtotechnicalcommittees;anyIECNationalCommitteeinterestedinthesubjectdealt withmayparticipatei
15、nthispreparatorywork.International,governmentalandnongovernmentalorganizations liaisingwiththeIECalsoparticipateinthispreparation.TheIECcollaboratescloselywiththeInternational OrganizationforStandardization(ISO)inaccordancewithconditionsdeterminedbyagreementbetweenthe twoorganizations. 2) Theformald
16、ecisionsoragreementsoftheIEContechnicalmatters,expressasnearlyaspossiblean internationalconsensusofopinionontherelevantsubjectssinceeachtechnicalcommitteehasrepresentation fromallinterestedNationalCommittees. 3) Thedocumentsproducedhavetheformofrecommendationsforinternationaluseandarepublishedinthe
17、formofstandards,technicalreportsorguidesandtheyareacceptedbytheNationalCommitteesinthat sense. 4) Inordertopromoteinternationalunification,IECNationalCommitteesundertaketoapplyIECInternational Standardstransparentlytothemaximumextentpossibleintheirnationalandregionalstandards.Any divergencebetweenth
18、eIECStandardandthecorrespondingnationalorregionalstandardshallbeclearly indicatedinthelatter. 5) TheIECprovidesnomarkingproceduretoindicateitsapprovalandcannotberenderedresponsibleforany equipmentdeclaredtobeinconformitywithoneofitsstandards. 6) Attentionisdrawntothepossibilitythatsomeoftheelementso
19、fthisInternationalStandardmaybethe subjectofpatentrights.IECshallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights. InternationalStandardIEC68267hasbeenpreparedbysubcommittee50B:Climatictests, ofIECtechnicalcommittee50:Environmentaltesting. Thetextofthisstandardisbasedonthefollowingdocument
20、s: FDIS Reportonvoting 50B/360/FDIS 50B/373/RVD Fullinformationonthevotingfortheapprovalofthisstandardcanbefoundinthereporton votingindicatedintheabovetable. IthasthestatusofabasicsafetypublicationinaccordancewithIECGuide104. IEC68consistsofthefollowingparts,underthegeneraltitle:Environmentaltesting
21、. Part1: Generalandguidance Part2: Tests Part3: Backgroundinformation Part4: InformationforspecificationwritersTestsummaries Part5: Guidetodraftingoftestmethods AnnexesAandBareforinformationonly.6 68267CEI:1995 ESSAISDENVIRONNEMENT Partie2:EssaisEssaiCy:Essaicontinudechaleurhumide, essaiacclrapplica
22、bleenpremierlieuauxcomposants 1 Domainedapplication LaprsenteNormeinternationaleapourobjetdefournirunemthodedessainormalise permettantdvaluer,demanireacclre,larsistancedeproduitslectrotechniquesde petitesdimensions,principalementdecomposantsnonhermtiquementferms,la dgradationparlachaleurhumide. Less
23、ainapaspourbutdvaluerleseffetsexternestelsquelacorrosionetladformation. 2 Descriptiongnrale Danscetessai,lespcimenestsoumisdetrshautsniveauxdechaleurhumidenonsature pendantuneprioderelativementlongue. Unepolarisationlectriqueesthabituellementapplique. Lessaifournituncertainnombrededuresprfrentielles
24、unehumiditrelativede85%et unetempraturede85C. Danslecasdecomposantsencapsulsdansduplastique,ladgradationrsultede labsorptiondevapeurdeauparleplastiqueetlapntrationdhumiditlelongdes connexions. 3 Descriptiondelappareillagedessai 3.1 Chambredessai Lachambredessaidoittreconstruitedefaontelleque: a) ell
25、epuisseproduirelatempratureetlhumiditrelativeprvuesdansletableau1sans interruptionpendantunepriodeaumoinsgale2000h; b) ellepuisseassurerlepilotagedelatempratureetdelhumiditrelativependant lpreuveainsiquelamonteversetladescentedepuislesconditionsdessaispcifies; c) latempratureetlhumiditdelachambrepui
26、ssenttrepiloteslaidedecapteurs situsdanslespacedetravailet/oudautresendroitsdonnantlesmmesrsultats; d) touteeauvenantdelespacedetravailsoitvacuedefaoncontinue,etnonrutilise; e) leaudecondensationnepuissepastombersurlespcimen; f) lesmatriauxutilisspourlaconstructionnentranentpasunecorrosionsignificat
27、ivedu spcimenouladgradationdelaqualitdeleaudhumidification(voirlarticleB.1). Latolrancede2Csurlatempratureapourbutdetenircomptedeserreursabsoluesde mesure,desfluctuationsdelatempraturelintrieurdelachambre,enunpointquelconque, etdesvariationsentredeuxpointsquelconquesdelespacedetravail.68267IEC:1995
28、7 ENVIRONMENTALTESTING Part2:TestsTestCy:Dampheat,steadystate, acceleratedtestprimarilyintendedforcomponents 1 Scope ThisInternationalStandardprovidesastandardtestprocedureforthepurposeofevaluating,in anacceleratedmanner,theresistanceofsmallelectrotechnicalproducts,primarilynon hermeticallysealedcom
29、ponents,tothedeteriorativeeffectofdampheat. Thetestisnotintendedtoevaluateexternaleffectssuchascorrosionanddeformation. 2 Generaldescription Inthistestthespecimenissubjectedtoveryhighlevelsofunsaturateddampheatfora relativelylongperiod. Electricalbiasisusuallyapplied. Thetestprovidesanumberofpreferr
30、eddurationsatarelativehumidityof85%anda temperatureof85C. Inthecaseofplasticencapsulatedcomponentsdegradationresultsfromabsorptionofwater vapourbytheplasticandpenetrationofmoisturealongterminals. 3 Descriptionoftestapparatus 3.1 Thetestchamber Thechambershallbesoconstructedthat: a) itcanproducethete
31、mperatureandrelativehumiditygivenintable1foraminimum periodof2000hwithoutinterruption; b) itiscapableofprovidingcontrolledconditionsoftemperatureandrelativehumidityduring testing,andtherampuptoandrampdownfromspecifiedtestconditions; c) thetemperatureandhumidityofthechambercanbemonitoredbymeansofsens
32、ing deviceslocatedintheworkingspaceand/orotherareasgivingthesameresults; d) anywatershallbecontinuouslydrainedfromtheworkingspaceandnotreused; e) condensed waterisnotallowedtofallonthespecimen; f) thematerialsusedintheconstructionshallnotcauseanysignificantcorrosionofthe specimen,ordegradationoftheq
33、ualityofthehumidifyingwater(seeclauseB.1). Thetemperaturetoleranceof2Cisintendedtotakeaccountofabsoluteerrorsinthe measurement,fluctuationsofthechambertemperatureatanypointandvariationsbetweenany twopointswithintheworkingspace.8 68267CEI:1995 Toutefois,danslebutdemaintenirlhumiditrelativelintrieurde
34、latolrancespcifie de5%,ilestaussincessairedemaintenirladiffrenceentredeuxpointsquelconquesde lespacedetravail(toutmoment)lintrieurdelimitesplusserres. Latolrancesurlhumiditrelativespcifieseradpassesilesdiffrencesdetemprature excdent1,5C.Ilestaussincessairedemaintenirunevaleursimilairelesvariationsde
35、 tempraturecourttermedueslargulationdudispositifdechauffagedelachambre. Ilconvientquelespcimennegnepasdefaonsignificativelacirculationdelair. Aucunecondensationnedoitseformeraucunmomentsurlespcimenpendantlessai. 3.2 Eaudhumidification Ondoitutiliserdeleaudistilleoudsionise.Leaudoitavoirunersistivitd
36、aumoins 0,5M W cm,23C.LavaleurdupHdoittrecompriseentre6,0et7,223C. Touteslespartiesinternesdelachambredoiventtrenettoyesavantqueleaunesoitmise danslhumidificateur.UnguidepourlenettoyageestdonnlarticleB.3. Legnrateurdevapeuret/oulachambredessaidoiventtrepurgsdetouteleureauaprs chaqueessai. 4 Svrits L
37、asvritdelessai,dfinieparladure,doittreprescriteparlaspcificationparticulire. Saufprescriptioncontrairedanslaspcificationparticulire,lunedesdurescitesdansle tableau1doittreutilise. Tableau1Svrits Temprature Humiditrelative Dure 3)4) h C 1) % 2) I II III IV 85 85 168 504 1000 2000 1) Tolrancesurlatemp
38、rature: 2 Cdanslespacedetravaildelachambredessai 2) Tolrancesurlhumiditrelative: 5% 3) Tolrancesurladure: 0 5 + % 4) Dfinitiondeladure: voir7.4.2 NOTEIlnestpasrecommandderecommencerunessai;toutefois,silestdemanddesoumettrele spcimenunedurepluslongueque2000h,lessaidoitalorstrerecommencenaccordavecles
39、 prescriptionsdelarticle7.Lessaidoittrerecommencdansles96hquisuiventlafindelapriodede descentedelessaiprcdent. Pendantlintervalledetempssparantlesessais,lespcimendoittremaintenusouslesconditions atmosphriquesnormalespourlesmesuresetlesessaissaufprescriptioncontrairedanslaspcification particulire.682
40、67IEC:1995 9 However,inordertomaintaintherelativehumiditywithinthespecifiedtoleranceof5%,itis necessarytokeepthedifferencebetweenanytwopointsintheworkingspace(atanyinstant) withinnarrowerlimits. Thespecifiedhumiditytolerancewillbeexceededifsuchtemperaturedifferencesexceed 1,5C.Itisalsonecessarytores
41、tricttheshorttermtemperaturefluctuationsduetocyclingof thechamberheatertoasimilarvalue. Thespecimenshouldnotsignificantlyimpedetheairflow. Condensationshallnotbeallowedtoformonthespecimenatanytimeduringthetest. 3.2 Thehumidifyingwater Distilledordeionisedwatershallbeused.Thewatershallhavearesistivityofnotlessthan 0,5M W cm at23C.ThepHvalueshallbebetween6,0and7,2at23C. Beforethewaterisplacedinthehumidifier,allinternalpartsofthechambershallbecleaned. GuidanceoncleaningisgiveninclauseB.3. Thehumidifierand/ortestchambershallbepurge
