1、BRITISH STANDARD BS EN 171:2002 Personal eye-protection Infrared filters Transmittance requirements and recommended use The European Standard EN 171:2002 has the status of a British Standard ICS 13.340.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS EN 171:2002 This Briti
2、sh Standard, having been prepared under the direction of the Health and Environment Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 13 May 2002 BSI 13 May 2002 ISBN 0 580 39695 9 National foreword This British Standard is the
3、official English language version of EN 171:2002. It supersedes BS EN 171:1992 which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee PH/2, Eye-protection, to Subcommittee PH/2/4, Welding, ultra violet and infrared filters, which has the responsibility to: A
4、 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 referred to in this document may be found in the BSI Standards Catalogue under the section entitled “Inte
5、rnational Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a
6、 British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and Europea
7、n 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 12, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendme
8、nts issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN171 March2002 ICS13.340.20 SupersedesEN171:1992 Englishversion PersonaleyeprotectionInfraredfiltersTransmittance requirementsandrecommendeduse ProtectionindividuelledeloeilFiltrespourlinfrarouge Exige
9、ncesrelativesaufacteurdetransmissionetutilisation recommande PersnlicherAugenschutzInfrarotschutzfilter TransmissionsanforderungenundempfohleneVerwendung ThisEuropeanStandardwasapprovedbyCENon20January2002. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsfor
10、givingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversionina
11、nyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembour
12、g,Malta,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2002CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnation
13、alMembers. Ref.No.EN171:2002EEN171:2002(E) 2 Contents page Foreword3 1 Scope 4 2 Normativereferences 4 3 Termsanddefinitions. .4 4 Designationandidentification 4 5 Requirements .4 5.1 General4 5.2 Transmittancerequirements .5 5.3 Ocularswithenhancedcolourrecognition(optional) . 5 5.4 Ocularswithenha
14、ncedreflectanceintheinfrared(optional) .6 AnnexA(normative) Relativevisualattenuationquotientforsignallightrecognition7 A.1 Definitionofrelativevisualattenuationquotientforsignallightrecognition.7 A.2 Spectralfunctionsforthecalculationofluminoustransmittanceandrelativevisual attenuationquotients 8 A
15、nnexB(informative) Guidanceonselectionanduse 9 B.1 General9 B.2 Filterswithenhancedcolourrecognition .9 B.3 Filterswithenhancedreflectanceintheinfrared. 9 AnnexC(informative) Uncertaintyofmeasurementandresultsinterpretation10 C.1 Testreportanduncertaintyofmeasurement .10 AnnexZA(informative) Clauses
16、ofthisEuropeanStandardaddressingessentialrequirementsorother provisionsofEUDirectives 12EN171:2002(E) 3 Foreword Thisdocument(EN171:2002)hasbeenpreparedbyTechnicalCommitteeCEN/TC85“Eyeprotectiveequipment“, thesecretariatofwhichisheldbyAFNOR. ThisEuropeanStandardshallbegiventhestatusofanationalstanda
17、rd,eitherbypublicationofanidenticaltextor byendorsement,atthelatestbySeptember2002,andconflictingnationalstandardsshallbewithdrawnatthe latestbySeptember2002. ThisdocumentsupersedesEN171:1992. ThisdocumenthasbeenpreparedunderamandategiventoCENbytheEuropeanCommissionandtheEuropean FreeTradeAssociatio
18、n,andsupportsessentialrequirementsofEUDirective(s). ForrelationshipwithEUDirective(s),seeinformativeannexZA,whichisanintegralpartofthisdocument. InthisstandardtheannexAisnormativeandtheannexesBandCareinformative. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefoll
19、owing countriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark,Finland, France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain, Sweden,SwitzerlandandtheUnitedKingdom.EN171:2002(E) 4 1Scope ThisEuropeanStandardspecifiesthescalenumb
20、ersandtransmittancerequirementsforfiltersforprotection againstinfraredradiation. Theotherapplicablerequirementsforthesetypesoffiltersandtheframes/mountingstowhichtheyareintendedto befittedaregiveninEN166. GuidanceontheselectionanduseofthesefiltersisgiveninannexB. NOTE Theprotectivefiltersspecifiedin
21、thisstandardarenotsuitableforthedirectorindirectobservationofanelectricar c. Forthispurposeaweldingfilterappropriatetothesourcebeingobservedshouldbyused. 2 Normativereferences ThisEuropeanStandardincorporatesbydatedorundatedreference,provisionsfromotherpublications.These normativereferencesareciteda
22、ttheappropriateplacesinthetext,andthepublicationsarelistedhereafter.For datedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplytothisEuropean Standardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthelatesteditionofthe publicationreferredtoapplies(includinga
23、mendments). EN165, PersonaleyeprotectionVocabulary. EN166, PersonaleyeprotectionSpecifications. EN167:2001, PersonaleyeprotectionOpticaltestmethods. ISO/CIE10526:1991, CIEstandardilluminantsforcolorimetry. ISO/CIE10527:1991, CIEstandardcolorimetricobservers. 3 Termsanddefinitions Forthepurposesofthi
24、sEuropeanStandard,thetermsanddefinitionsgiveninEN165apply. 4 Designationandidentification ThecompletetableofnumberingoffiltersisgiveninEN166. ThemarkingofocularsandframeisdescribedinEN166. Thescalenumberofinfraredfilterscomprisesthecodenumber4,andtheshadenumbercorrespondingtothe filter,from1,2to10(s
25、eeTable1). 5Requirements 5.1General TherequirementsofEN166applytoinfraredfilters.Onlythoserequirementsthataredifferentfromorsupplement theEN166specificationsaregiveninthisEuropeanStandard.EN171:2002(E) 5 5.2 Transmittancerequirements ThedefinitionsoftransmittancesaregiveninEN165. Thedeterminationofl
26、uminoustransmittanceisdescribedinEN167:2001. ThetransmittancerequirementsforfiltersusedforprotectionagainstinfraredradiationaregiveninTable1. Table1Transmittancerequirements Luminous transmittance v Maximummean spectraltransmittancein theinfrared Scale number Maximum % Minimum % A 780nmto1400nm % N
27、780nmto2000nm % 41,2 100 74,4 5,5 52,9 41,4 74,4 58,1 4,8 47,2 41,7 58,1 43,2 4,1 42,2 42 43,2 29,1 3,6 37,9 42,5 29,1 17,8 2,9 32,3 43 17,8 8,5 1,9 22,9 44 8,5 3,2 1,2 15,9 45 3,2 1,2 0,71 10,6 46 1,2 0,44 0,43 7,1 47 0,44 0,16 0,23 4,4 48 0,16 0,061 0,14 2,9 49 0,061 0,023 0,075 1,8 410 0,023 0,00
28、85 0,050 1,3 NOTE1 Theluminoustransmittance,asshowninTable1,isbasedonthespectraldistributionforafullradiatorat1900K andtheCIE(1931)standardobserver(2)(seeISO/CIE10526:1991andISO/CIE10527:1991). NOTE2 Infraredfiltersshouldprotecttheuseragainstinfraredradiationwhilstpermittingpropervisionofthevisualta
29、skto beperformed,includingtherecognitionofsafetysignals.Itisnecessaryinparticulartotakecarethatthechromaticity coordinatesofthefiltersarecompatiblewithgoodrecognitionofcolourespeciallyforgoodevaluationofmeltingfurnace temperatures.Filtersthatdonotconformtothesecriteriacouldleadtodifficultiesforusers
30、. NOTE3 Minimum and maximum valuesof luminous transmittancemay be exceeded by taking into account the limits of relativeuncertaintygiveninEN167:2001. 5.3 Ocularswithenhancedcolourrecognition(optional) Between500nmand650nm,thespectraltransmittanceshallbenotlessthan0,2 v . Therelativevisualattenuation
31、quotient Q,forsignallightsred,yellow,greenandblueshallbenotlessthan0,8. Filterswhichfulfilthisrequirement,inadditiontothetransmittancerequirementsgivenin5.2,maybemarked “4CShadenumber“.EN171:2002(E) 6 5.4 Ocularswithenhancedreflectanceintheinfrared(optional) Ocularswhichareclaimedtohaveenhancedrefle
32、ctanceintheinfraredshallhaveameanspectralreflectance greaterthan60%withinthewavelengthrange780nmto2000nmwhenmeasuredinaccordancewith EN167:2001, 6.Filterswhichfulfilthisrequirement,inadditiontothetransmittancerequirementsgivenin5.2,may bemarked“scalenumberR“.EN171:2002(E) 7 AnnexA (normative) Relati
33、vevisualattenuationquotientforsignallightrecognition A.1 Definitionofrelativevisualattenuationquotientforsignallightrecognition Thisquotient Qisdefinedas: Q= v sign where v istheluminoustransmittanceofthefilterforCIEstandardilluminantD65.SeeISO/CIE10526:1991 sign istheluminoustransmittanceofthefilte
34、rforthespectralpowerdistributionofthetrafficsignallight. Thesearegivenbytheequations: d d D65 nm 780 nm 380 D65 nm 780 nm 380 S V S V F v d d A nm 780 nm 380 A nm 780 nm 380 S V S V s s F sign where S A ( ) isthespectraldistributionofradiationofCIEstandardilluminantA(or3200Klightsourceforblue signal
35、light).SeeISO/CIE10526:1991 S D65 ( ) isthespectraldistributionofradiationofCIEstandardilluminantD65.SeeISO/CIE10526:1991 V( ) isthespectralvisibilityfunctionfordaylightvision.SeeISO/CIE10527:1991 S ( ) isthespectraltransmittanceofthetrafficsignallens; F ( ) isthespectraltransmittanceofthefilter.EN1
36、71:2002(E) 8 Thespectralvaluesoftheproductsofthespectraldistributions(S A ( ),S D65 ( ),oftheilluminants,the spectralvisibilityfunction V( )oftheeyeandthespectraltransmittance S ( )ofthetrafficsignallensesaregiven inA.2. A.2 Spectralfunctionsforthecalculationofluminoustransmittanceandrelativevisual
37、attenuationquotients TableA.1ProductofthespectraldistributionofradiationofthesignallightsandstandardilluminantD65 asspecifiedinISO/CIE10526:1991andthespectralvisibilityfunctionoftheaveragehumaneyefor daylightvisionasspecifiedinISO/CIE10527:1991 Wavelength S A ( ) V( ) S ()S D65 ( ) V( ) nm red yello
38、w green blue a 380 0 0 0 0,0001 0 390 0 0 0 0,0008 0,0005 400 0 0 0,0014 0,0042 0,0031 410 0 0 0,0047 0,0194 0,0104 420 0 0 0,0171 0,0887 0,0354 430 0 0 0,0569 0,3528 0,0952 440 0 0 0,1284 0,8671 0,2283 450 0 0 0,2522 1,5961 0,4207 460 0 0 0,4852 2,6380 0,6688 470 0 0 0,9021 4,0405 0,9894 480 0 0 1,
39、6718 5,9025 1,5245 490 0 0 2,9976 7,8862 2,1415 500 0 0 5,3553 10,1566 3,3438 510 0 0 9,0832 13,0560 5,1311 520 0 0,1817 13,0180 12,8363 7,0412 530 0 0,9515 14,9085 9,6637 8,7851 540 0 3,2794 14,7624 7,2061 9,4248 550 0 7,5187 12,4687 5,7806 9,7922 560 0 10,7342 9,4061 3,2543 9,4156 570 0 12,0536 6,
40、3281 1,3975 8,6754 580 0,4289 12,2634 3,8967 0,8489 7,8870 590 6,6289 11,6601 2,1640 1,0155 6,3540 600 18,2382 10,5217 1,1276 1,0020 5,3740 610 20,3826 8,9654 0,6194 0,6396 4,2648 620 17,6544 7,2549 0,2965 0,3253 3,1619 630 13,2919 5,3532 0,0481 0,3358 2,0889 640 9,3843 3,7352 0 0,9695 1,3861 650 6,
41、0698 2,4064 0 2,2454 0,8100 660 3,6464 1,4418 0 1,3599 0,4629 670 2,0058 0,7892 0 0,6308 0,2492 680 1,1149 0,4376 0 1,2166 0,1260 690 0,5590 0,2191 0 1,1493 0,0541 700 0,2902 0,1137 0 0,7120 0,0278 710 0,1533 0,0601 0 0,3918 0,0148 720 0,0742 0,0290 0 0,2055 0,0058 730 0,0386 0,0152 0 0,1049 0,0033
42、740 0,0232 0,0089 0 0,0516 0,0014 750 0,0077 0,0030 0 0,0254 0,0006 760 0,0045 0,0017 0 0,0129 0,0004 770 0,0022 0,0009 0 0,0065 0 780 0,0010 0,0004 0 0,0033 0 Sum 100 100 100 100 100 a Forblueflashinglightthespectraldistributionfor3200KisusedinsteadofstandardilluminantA.EN171:2002(E) 9 AnnexB (info
43、rmative) Guidanceonselectionanduse B.1General Forthepersonalprotectionoftheoperatorthefiltershouldbemountedinasuitableeyeprotector.Eyeprotector typesaredescribedinEN166. Whenthelevelofradiationisveryhigh,filterswithreflectivesurfacetreatmentarerecommendedforIRprotection becausethereflectionoftheIRra
44、diationresultsinasmallerriseinfiltertemperature. TableB.1Designationandtypicalapplications Scalenumber Typicalapplication intermsofmean temperaturesources C 41,2 Upto1050 41,4 1070 41,7 1090 42 1110 42,5 1150 43 1190 44 1290 45 1390 46 1510 47 1650 48 1810 49 1990 410 2220 B.2 Filterswithenhancedcolourrecognition Forprocessesinwhichcolourrecognitionisimportant,theuseofIRfilterswithenhancedcolourrec
