1、BRITISH STANDARD BS EN 1149-3:2004 Protective clothing Electrostatic properties Part 3: Test methods for measurement of charge decay The European Standard EN 1149-3:2004 has the status of a British Standard ICS 13.340.10 BS EN 1149-3:2004 This British Standard was published under the authority of th
2、e Standards Policy and Strategy Committee on 5 May 2004 BSI 5 May 2004 ISBN 0 580 43736 1 National foreword This British Standard is the official English language version of EN 1149-3:2004. The UK participation in its preparation was entrusted by Technical Committee PH/3, Protective clothing, to Sub
3、committee PH/3/1, Clothing for protection against general hazards, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications refe
4、rred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provi
5、sions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation,
6、 or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 20, an inside back cover and a back cover.
7、 The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN11493 April2004 ICS13.340.10 Englishversion ProtectiveclothingElectrostaticpropertiesPart3:Test
8、 methodsformeasurementofchargedecay VtementsdeprotectionPropritslectrostatiques Partie3:Mthodesdessaipourlamesuredelattnuation delacharge SchutzkleidungElektrostatischeEigenschaftenTeil3: PrfverfahrenfrdieMessungdesLadungsabbaus ThisEuropeanStandardwasapprovedbyCENon2February2004. CENmembersarebound
9、tocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. ThisEur
10、opeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cypru
11、s,CzechRepublic,Denmark,Estonia,Finland,France, Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal, Slovakia, Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESK
12、OMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2004CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN11493:2004:EEN11493:2004(E) 2 Content page Foreword3 1 Scope 5 2 Normativereferences 5 3 Termsanddefinitions. .5 4 Testmethods 6 5 Rep
13、orting 12 AnnexA (informative) Explanatorynotes . .19 AnnexZA (informative) ClausesofthisEuropeanStandardaddressingessentialrequirementsor otherprovisionsofEUDirectives 20EN11493:2004(E) 3 Foreword Thisdocument(EN11493:2004)hasbeenpreparedbyTechnicalCommitteeCEN/TC162“Protectiveclothing includinghan
14、dandarmprotectionandlifejackets”,thesecretariatofwhichisheldbyDIN. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidenticaltextor byendorsement,atthelatestbyOctober2004,andconflictingnationalstandardsshallbewithdrawnatthelatest byOctober2004. Thisdocumenthasbeenp
15、reparedunderamandategiventoCENbytheEuropeanCommissionandtheEuropean FreeTradeAssociation,andsupportsessentialrequirementsofEUDirective(s). ForrelationshipwithEUDirective(s),seeinformativeannexZA,whichisanintegralpartofthisdocument. AnnexAisinformative. EN1149consistsofthefollowingparts,underthegener
16、altitle“ProtectiveclothingElectrostaticproperties“: Part1:Surfaceresistivity(Testmethodsandrequirements ) Part2:Testmethodformeasurementoftheelectricalresistancethroughamaterial(verticalresistance) Part3:Testmethodsformeasurementofchargedecay Part 4 1) :Garmenttests Part 5 1) :Performancerequirement
17、s AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowing countriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,Cyprus,CzechRepublic,Denmark, Estonia,Finland,France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta, Netherl
18、ands,Norway,Poland,Portugal,Slovakia,Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. 1) Incourseofpreparation.EN11493:2004(E) 4 Introduction ThisEuropeanStandardispartofaseriesoftestmethodsandrequirementsforelectrostaticpropertiesof protectiveclothing.Differentpartsarenecessary,becauseofthevariou
19、sfieldsofapplicationanddiversenatureof garmentmaterials. Twotestmethodsaredescribedformeasuringtherateofdissipationofelectrostaticchargeofgarmentmaterials, i.e.thechargedecay.Inbothcases,chargeismonitoredbyobservationoftheelectrostaticfielditgeneratesand thisisdoneusingnoncontactingfieldmeasuringins
20、truments.Theprincipaldifferencebetweenthemethodsisthe techniqueusedtogeneratetheelectrostaticcharge.Triboelectricchargingreliesonthechargegeneratedastwo materialscomeintocontact,rubtogetherandsubsequentlyseparate.Inductioncharginginvolvesanelectrode placedbeneaththetestsurfaceandisraisedtoadefinedpo
21、tential.Inducedchargeonthetestmaterialinfluences thenetfieldthatisobservedbyafieldmeasuringprobepositionedabovethetestsurface.EN11493:2004(E) 5 1Scope ThisEuropeanStandardspecifiesmethodsformeasuringthedissipationofelectrostaticchargefromthesurfaceof materialsforgarments.Thetestmethodsareapplicablet
22、oallmaterials,includinghomogeneousmaterialsand inhomogeneousmaterialswithsurfaceconductingfibresandcoreconductingfibres. 2 Normativereferences ThisEuropeanStandardincorporatesbydatedorundatedreference,provisionsfromotherpublications.These normativereferencesarecitedattheappropriateplacesinthetext,an
23、dthepublicationsarelistedhereafter.For datedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplytothisEuropean Standardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthelatesteditionofthe publicationreferredtoapplies(includingamendments). EN340:2003, Protectiv
24、eclothingGeneralrequirements. EN11491:1995, ProtectiveclothingElectrostaticpropertiesPart1:Surfaceresistivity(testmethodsand requirements). 3 Termsanddefinitions ForthepurposesofthisEuropeanStandard,thetermsanddefinitionsofEN340:2003andEN11491:1995 togetherwiththefollowingapply. 3.1 surfaceconductin
25、gfibre fibreinwhichtheconductingcomponentisexposedatthesurface.Dependingonthecrosssectionofthefibre,all oronlypartofitssurfacemaybeconducting 3.2 coreconductingfibre fibreinwhichtheconductingcomponentiscompletelyencapsulatedinnonconductingmaterial 3.3 chargedecay migrationofchargeacrossorthroughamat
26、erialleadingtoareductionofchargedensityorsurfacepotentialatthe pointwherethechargewasdeposited 3.4 Electricfieldstrength 3.4.1 testmethod1 E 0 maximumelectricfieldstrengthaftertriboelectriccharging(kV/m); E 30 electricfieldstrength30safter E 0 (kV/m) 3.4.2 testmethod2 E max electricfieldstrengthindi
27、catedontherecordingdevicewithnotestspecimenpresent(kV/m); E R maximumelectricfieldstrengthindicatedontherecordingdevicewiththetestspecimeninthemeasuring positionEN11493:2004(E) 6 3.5 halfdecaytime t 50 thetimetakenfortheindicatedfieldstrengthtodecayto E max /2(s) 3.6 shieldingfactor S relationshipbe
28、tween E max and E R calculatedas: max 1 E E S R - = 4Test methods 4.1 Samplepreparationandconditioningapplicableforbothtestmethods 4.1.1Pretreatment Thetestsampleshallbepretreatedaccordingtothespecificclothingstandardorotherwiseshallundergofive cyclesofcleaningaccordingtoEN340. NOTE Pretreatmentisno
29、trequiredforgarmentsnotintendedtobecleanedinuse(e.g.forsingleusegarments). 4.1.2 Atmosphereforconditioningandtesting Unlessotherwisespecified,thetestspecimensshallbeconditionedforatleast24hoursinanatmosphereof (23 1) Cand(25 5)%relativehumidity.Testingshallbeperformedinthesameatmosphere. 4.2Triboele
30、ctriccharging(testmethod1) 4.2.1Principle Testmaterialsarechargedbyrubbingagainstcylindricalrodsmountedonaverticallyrunningslider.Theelectrical fieldstrengthfromthechargegeneratedonthetestmaterialisobservedandrecordedusinganelectrostatic fieldmeterconnectedtoagraphicalrecordingdevice.EN11493:2004(E)
31、 7 4.2.2Equipment 4.2.2.1General ThetestapparatusisshowninFigure1. 4.2.2.2 Cylindricalrods Tworodsoflength(100 5)mmwithacircularcrosssectionofdiameter(15,0 0,5)mmareused.Therodsare attachedtoametalsliderinaparallelfashionwithoutfreedomofrotationsuchthatthebottomofthefirstrodis horizontallyinlinewith
32、thetopofthesecondrodandwithadistanceof(15 1)mmbetweentheirnearestedges (seeFigure1). Twopairsofrodsarerequired,onepairmadefromhighdensitypolyethylene(HDPE)andonepairmadefrom aluminium.Thefixtureusedtoattachtherodstotheslidershallallowrodstobeinterchanged. TheHDPErodsshallhaveaspecificgravityof(999 1
33、0)kg/mandshorehardnessDof63;surfaceresistanceof 10 6 W andvolumeresistivityof 10 6 W cm. Thematerialforaluminiumrodsshallbe: AlMgSi(3.3207;6060) NOTE ProduceroftheHDPEmaterial(PEEL):SIMONAAG,D55606Kirn.Thisinformationisgivenfortheconvenience ofusersofthisstandardanddoesnotconstituteanendorsementbyCE
34、N/TC162oftheproductnamed.Equivalentproducts maybeusediftheycanshowntoleadtothesameresults. 4.2.2.3 Sliderandsupportstructure Theslidertowhichthecylindricalrodsareattachedrunsononeormoreverticalguiderail(s).Thestartpositionof theslideristhehighestpointontheguiderail(s).Theslideriseitherallowedtofallf
35、reelyunderitsownweight,or isdrivendowntheguiderail(s)byasuitablemotor.Intheformercase,asuitableclampisrequiredtolockthe sliderinthestartpositionpriortoeachmeasurement.Theslider,guiderail(s)andsupportframeworkshallbeof anydesignthatsatisfiestherequirementofallowingthecylindricalrodstomovedownataveloc
36、ityof (0,20 0,02)m/sinaverticaldirectionwithoutsignificanttwistingorrotation.Allmetalworkshallbeconnectedto earth. 4.2.2.4 Specimenclampandtensioningdevice Theupperedgeofthespecimenisclampedtoarigidstructureandistensionedbyattachingafreehangingclamp tothebottomedge.Thefreehangingclampshallbesuchthat
37、theloadevenlyappliedtothefullwidthofthe specimen.Thefixedclampshallbemetalandshallbeconnectedtoearth.Theloadappliedtothetestspecimen bythebottomclampshallbe(1,30 0,05)N.Incaseelongationofthetestspecimenislargerthan5%thenaload of(0,2 0,05)Nshallbeused. 4.2.2.5Fieldmeter Anelectrostaticfieldmetermeeti
38、ngatleastthefollowingspecificationispositionedwithitssensingaperture (50 5)mmfromtheplaneofthetestspecimen(seeFigure2)whenthesliderhasdecended: range:atleast1kV/mto200kV/m; resolution: 1kV/m; responsetime: 10ms; zerodrift: 0,5kV/m(longterm)orbetter.EN11493:2004(E) 8 Thefieldmetershallhaveanoutputfun
39、ctionthatallowsconnectiontoarecordingdevice. NOTE Careshouldbetakentoavoidpresenceofchargedobjectsthatcaninfluencethereadingofthefieldmeter. 4.2.2.6 Recordingdevice Ameansofrecordingtimerelateddatafromthefieldmeteroutput,preferablyingraphicform.Thetimeresolution andresponsetimeoftherecordingdevicesh
40、allbe1msorless,anditshallbecapableofrecordingthefullrange ofoutputfromthefieldmeter.Examplesofsuitabledevicesincludepaperchartrecorders,storageoscilloscopes, anddataloggers/computerswithappropriatesoftware. 4.2.2.7 Staticneutraliser AmeansofneutralisingelectrostaticchargeontestspecimensandHDPErodspr
41、iortomeasurement,e.g.electric airionisation. 4.2.2.8 Cleaningagent Anappropriateliquidcleaningagent,iseitherpropan2olorethanol. WARNING:Propan2olandethanolarehighlyflammableandharmfultohealth.Avoidbreathingthevapourand contactwithskin,eyesorclothing. 4.2.3Specimens Cuttwelvespecimenseachmeasuring(50
42、 2)mm (300 2)mmfromthesamplefabricorgarment,sixcutwith thelongdimensioninthewarpormachinedirectionandsixintheweftorwidthdirection.Incasethemachine directioncannotbeidentifiedsixspecimenshallbecutfromeachoftwoorthogonaldirections.Threespecimensin warpandthreespecimensinwefttobeusedwithHDPErodsandthre
43、especimensinwarpandthreespecimens inwefttobeusedwithaluminiumrods.Specimenshallnotcontainseams.Handlethespecimensonlyatthe edgestoavoidcontamination. 4.2.4Procedure Cleanthecylindricalrodsbywipingwithapapertissuemoistenedwiththecleaningagent(4.2.2.7).Allowthe cylindricalrodstodry. Secureoneendofthefirstspecimentothefixedclampand
