1、April 2012 Translation by DIN-Sprachendienst.English price group 12No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS
2、13.280!$?+“1882808www.din.deDDIN EN 12254Screens for laser working places Safety requirements and testing(includes Corrigendum AC:2011)English translation of DIN EN 12254:2012-04Abschirmungen an Laserarbeitspltzen Sicherheitstechnische Anforderungen und Prfung(enthlt Berichtigung AC:2011)Englische b
3、ersetzung von DIN EN 12254:2012-04crans pour postes de travail au laser Exigences et essais de scurit(Corrigendum AC:2011 inclus)Traduction anglaise de DIN EN 12254:2012-04SupersedesDIN EN 12254:2010-07www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Docum
4、ent comprises 24 pages03.12DIN EN 12254:2012-04 2 A comma is used as the decimal marker. Start of validity This standard takes effect on 1 July 2010. National foreword This standard includes safety requirements. This standard has been prepared by Technical Committee CEN/TC 85 “Eye protective equipme
5、nt” (Secretariat: AFNOR, France). The responsible German body involved in its preparation was the Normenausschuss Feinmechanik und Optik (Optics and Precision Mechanics Standards Committee), Working Committee NA 027-01-01 AA Augenschutz. This document includes Corrigendum AC:2011 approved by CEN on
6、2011-12-21. The start and finish of text introduced or altered by amendment is indicated in the text by tags nullnull. This standard contains specifications meeting the essential requirements set out in Annex I of the new “Machinery Directive”, Directive 2006/42/EC, and which apply to machines that
7、are either first placed on the market or commissioned within the EEA. This standard serves to facilitate proof of compliance with the essential requirements of the directive. Once this standard is cited in the Official Journal of the European Union, it is deemed a “harmonized” standard and thus, a m
8、anufacturer applying this standard may assume compliance with the requirements of the Machinery Directive (“presumption of conformity”). The DIN Standards corresponding to the International Standards referred to in this document are as follows: IEC 60825-1 DIN EN 60825-1 (VDE 0837-1) IEC 60825-4 DIN
9、 EN 60825-4 (VDE 0837-4) Amendments This standard differs from DIN EN 12254:2008-04 and DIN EN 12254 Corrigendum 1:2009-02 as follows: a) correction factor N1/4for the energy density in Table 1 has been introduced; b) a new clause has been added which allows interchangeable filters, if the frame doe
10、s not contribute to laser safety; c) the laser beam diameter for testing has been set to 1 mm. Compared with DIN EN 12254:2010-07, the following correction has been made: a) in Subclause B.1 the third paragraph has been modified. Previous editions DIN EN 12254: 1999-02, 2002-12, 2008-04, 2010-07 DIN
11、 EN 12254 Corrigendum 1: 2009-02 DIN EN 12254:2012-04 3 National Annex NA (informative) Bibliography DIN EN 60825-1 (VDE 0837-1), Safety of laser products Part 1: Equipment classification and requirements DIN EN 60825-4 (VDE 0837-4), Safety of laser products Part 4: Laser guards DIN EN 12254:2012-04
12、 4 This page is intentionally blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12254 March2010ICS 13.280 Supersedes EN 12254:1998+A2:2008English Version Screens for laser working places - Safety requirements and testing crans pour postes de travail au laser - Exigences et essais de scurit
13、Abschirmungen an Laserarbeitspltzen - Sicherheitstechnische Anforderungen und Prfung This European Standard was approved by CEN on 20 February 2010 and Corrigendum AC on 21 December 2011. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giv
14、ing this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or to any CEN member. This European Standard exists in three official ve
15、rsions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgi
16、um, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Management Cen
17、tre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG + ACDecember 2011 Ref. No. EN 12254:2010 + AC:2011
18、: E 2 Contents Page Foreword 31 Scope 42 Normative references 43 Terms and definitions .54 Requirements .54.1 Spectral transmittance 54.2 Resistance to laser radiation 54.3 Stability to UV radiation 54.4 Stability to elevated temperature .54.5 Mechanical strength 54.6 Resistance to ignition .65 Test
19、ing 65.1 General 65.2 Spectral transmittance 65.3 Resistance to laser radiation 65.4 Stability to UV radiation and stability at elevated temperature 85.4.1 Stability to UV radiation 85.4.2 Stability at elevated temperature .85.5 Mechanical strength 85.5.1 Flexible screens .85.5.2 Inflexible screens
20、.95.5.3 Resistance to ignition .96 Marking 107 Information supplied by the manufacturer 11Annex A (informative) Principles 12A.1 Limit values . 12A.2 Time base used to calculate the MPE values 12A.3 Resistance to laser radiation . 12A.4 Example test report 14Annex B (informative) Selection of screen
21、s for laser working places 16B.1 General . 16B.2 Pulsed lasers . 16B.3 Caution for users of laser safety screens 17Annex C (informative) Significant technical changes between this European Standard and the previous edition 18Annex ZA (informative) Relationship between this European Standard and the
22、Essential Requirements of EU Directive 2006/42/EC . 19Bibliography . 20DIN EN 12254:2012-04 EN 12254:2010 + AC:2011 (E) 3 Foreword This document (EN 12254:2010) has been prepared by Technical Committee CEN/TC 85 “Eye protective equipment”, the secretariat of which is held by AFNOR. This European Sta
23、ndard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by September 2010, and conflicting national standards shall be withdrawn at the latest by September 2010. Attention is drawn to the possibility that some of the element
24、s of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 12254:1998+A2:2008. This document has been prepared under a mandate given to CEN by the European Commission and the Euro
25、pean Free Trade Association, and supports essential requirements of EC Directive(s). For relationship with EC Directive(s), see informative Annex ZA, which is an integral part of this document. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following c
26、ountries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, S
27、lovenia, Spain, Sweden, Switzerland and the United Kingdom. DIN EN 12254:2012-04 EN 12254:2010 + AC:2011 (E) 4 1 Scope This European Standard specifies functional requirements and a product labelling applicable to temporary and permanent passive guards (in the following called screens) for protectio
28、n against laser radiation. This standard includes test methods for testing functional performance and the specification of the user documentation to be supplied with the product. The screens are designed to protect the user from: unintentional exposure to direct and/or diffuse laser radiation; a tim
29、e limited exposure to laser radiation, based on the functional requirements determined by risk assessment. This European Standard applies to supervised screens for installations in working places at which laser radiation up to a maximum mean power of 100 W or single pulse energy of 30 J occurs withi
30、n the spectral range between 180 nm (0,18 m) and 106nm (1 000 m). This European Standard applies to the protection against laser radiation only. This standard does not apply to other hazards including hazards from secondary radiation that can arise during, for example, material processing. This Euro
31、pean Standard gives guidance on how to select such screens. Laser enclosures and housings that are supplied as part of the laser product or are supplied to be fitted to a laser system to form a laser product (according to EN 60825-1) are not considered to be within the scope of the standard. 2 Norma
32、tive references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 165:2005, Personal eye-protect
33、ion Vocabulary EN 166:2001, Personal eye-protection Specifications EN 168:2001, Personal eye-protection Non-optical test methods EN 1598:1997, Health and safety in welding and allied processes Transparent welding curtains, strips and screens for arc welding processes EN 1598:1997/A1:2001, Health and
34、 safety in welding and allied processes Transparent welding curtains, strips and screens for arc welding processes EN 60825-1:2007, Safety of laser products Part 1: Equipment classification and requirements (IEC 60825-1:2007) EN 60825-4:2006, Safety of laser products Part 4: Laser guards (IEC 60825-
35、4:2006) IEC 60050-845:1987, International Electrotechnical Vocabulary Chapter 845: Lighting DIN EN 12254:2012-04 EN 12254:2010 + AC:2011 (E) 5 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 165:2005, EN 60825-1:2007, EN 60825-4:2006 and IEC 60050-845
36、:1987 apply. 4 Requirements 4.1 Spectral transmittance The relationship between spectral transmittance at the laser wavelength and resistance to laser radiation is based on the maximum permissible exposure (MPE) shown in EN 60825-1. To simplify product specification, tests are conducted for laser te
37、st conditions described in Table 1. The laser test conditions are referred to by the symbols D, I, R and M. Table 1 Duration of test applicable to screens for laser working places Test condition (corresponding laser designation) Pulse duration s Number of pulses D (continuous wave (CW) laser) 100 1
38、I (pulsed laser) 10-6to 10-21 000 R (Giant pulsed laser) 10-9to 10-6000M (Mode-coupled pulsed laser) 10-9100 000 NOTE The listed pulse durations are values of typical lasers. A laser with a pulse length in this range of values is recommended for testing. Total exposure time for each test should be a
39、bout 100 s. 4.2 Resistance to laser radiation The screens shall not lose their protective properties and shall stay within the scale number under effect of laser radiation with the power and energy density as specified in Table 2 including induced transmission (reversible bleaching). 4.3 Stability t
40、o UV radiation When exposed to ultraviolet radiation in accordance with 5.4.1, the spectral transmittance at the laser wavelengths shall not exceed the maximum permissible spectral transmittance of the corresponding scale number. 4.4 Stability to elevated temperature After exposure to elevated tempe
41、rature in accordance with 5.4.2, the requirements of 4.1 to 4.2 shall be met. 4.5 Mechanical strength Flexible screens shall withstand for 10 s a tensile stress of 15 N/mm2 when tested according to 5.5.1. After this test, no sample shall be torn. Inflexible screens shall be robust in accordance to 7
42、.1.4.2 of EN 166:2001. Fixing systems of screens shall be designed so that they remain attached to the screens or to the machinery when the screens are removed. DIN EN 12254:2012-04 EN 12254:2010 + AC:2011 (E) 6 4.6 Resistance to ignition Flexible screens shall satisfy the requirements of 4.4 of EN
43、1598:1997 when tested in accordance with 4.4 of EN 1598:1997 and EN 1598:1997/A1:2001. Inflexible screens shall meet requirements according to 7.1.7 of EN 166:2001. 5 Testing 5.1 General The testing schedule in Table 3 applies to testing of flexible and inflexible screens. At least 18 samples are re
44、quired for testing. If testing for several wavelengths (wavelength ranges) or testing conditions according to Tables 1 and 3 has to be done, more samples can be necessary. 5.2 Spectral transmittance The spectral transmittance shall be determined at normal incidence. Screens with angular-dependent tr
45、ansmittance shall be measured at angles of incidence between 0 and 90 with polarised radiation. In this case, the scale number results from the highest of the spectral transmittance values measured. 5.3 Resistance to laser radiation Testing shall be carried out with laser radiation of the specific w
46、avelength(s) and the power and energy densities as indicated in Table 2. Spectral transmittance at the laser wavelength shall be measured during the exposure to laser radiation. DIN EN 12254:2012-04 EN 12254:2010 + AC:2011 (E) 7 Table 2 Scale numbers of screens for laser working places (maximum spec
47、tral transmittance and resistance to laser radiation) Maximum spectral transmittance at the laser wavelength Mean power (E) and single pulse energy density (H) for testing protective properties and resistance to laser radiation in the wavelength range 180 nm to 315 nm 315 nm 1 050 nm 315 nm to to to
48、 1 400 nm to 106 nm 1 050 nm 1 400 nm 1 400 nm For test condition/pulse duration in s (see Table 1) Scale number () D I, R M D D I, R M D I, R M 0,25 10-9 to 0,25 109 510-3 210-3 109to 0,01 109 0,1 10-9to 0,1 10-9EDHI, REMEDEDHI, RHMEDHI, REMW/m2J/m2W/m2W/m2W/m2J/m2J/m2W/m2J/m2W/m2AB1 1010,01 310231
49、01110 2,51020,05 0,0015 1041031012AB2 1020,1 3103310121022,51030,5 0,015 1051041013AB3 1031 3104310131032,51045 0,15 1061051014AB4 10410 3105310141042,510550 1,5 1071061015AB5 1051023106310151052,5106510215 1081071016AB6 1061033107310161062,510751031,51021091081017AB7 1071043108310171072,510851041,510310101091018AB8 1081053109310181082,510951051,5
