SIST EN 12254:1999+A2:2008
(Main)Screens for laser working places - Safety requirements and testing
Screens for laser working places - Safety requirements and testing
This standard specifies specific functional requirements and a product labelling system applicable to a range of temporary and permanent passive guards (in the following called screens) for protection against laser radiation. This standard includes test methods for testing functional performance and also the specification of the user documentation to be supplied with the product. The screens are designed to protect the user from uncontrolled emission of direct and/or diffuse radiation for a defined exposure to lasers, based on the necessary functional requirements for any particular application being determined by risk assessment principles. This 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 within the spectral range between 180 nm (0,18 µm) and 106 nm (1000 µm). This 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 standard gives guidance on how to select such screens. The following are not considered to be within the scope of the standard: - 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 IEC 60 825-1:1998); - any screen whose protective properties are limited to a restricted range of angles of incidence (e.g. some interference filters).
Abschirmungen an Laserarbeitsplätzen - Sicherheitstechnische Anforderungen und Prüfung
Diese Europäische Norm legt Anforderungen an die Funktion sowie ein Produkt-Kennzeichnungssystem für zeitweilige oder permanente passive Schutzwände zum Schutz vor Laserstrahlung (nachfolgend Abschirmun¬gen genannt) fest. Diese Europäische Norm enthält Prüfverfahren für die Funktion und auch die Benutzerinformation, die mit dem Produkt zu liefern ist. Die Abschirmungen sind konstruiert, um den Benutzer vor unkontrollierter Ausbreitung von direkter und/oder gestreuter Strahlung für festgelegte Laserbestrahlung zu schützen, nachdem die erforderliche Funktion für die jeweilige Anwendung durch eine Risikoanalyse bestimmt wurde.
Diese Europäische Norm gilt für überwachte Abschirmungen für den Aufbau an Arbeitsplätzen, an denen Laserstrahlung mit maximal 100 W mittlerer Leistung oder 30 J Einzelimpulsenergie im Spektralbereich von 180 nm (0,18 µm) bis 106 nm (1000 µm) eingesetzt wird.
Diese Europäische Norm gilt nur für den Schutz gegen Laserstrahlung. Sie gilt nicht für andere Gefahren einschließlich der Gefährdung durch Sekundärstrahlung, die beispielsweise während der Materialbearbeitung entstehen kann.
Diese Europäische Norm gibt Hinweise zur Auswahl solcher Abschirmungen.
Folgendes fällt nicht unter den Anwendungsbereich dieser Europäische Norm:
Laserumschließungen und -gehäuse, die als Teil der Lasereinrichtung oder zum Anbau an ein Laser¬system geliefert werden, um eine Lasereinrichtung (nach IEC 60825-1:1998) zu bilden;
Abschirmungen, deren Schutzwirkung auf einen bestimmten Bereich von Einfallswinkeln beschränkt ist (wie beispielsweise einige Interferenzfilter).
Ecrans pour postes de travail au laser - Exigences et essais de sécurité
La présente norme spécifie les exigences fonctionnelles et le système d'étiquetage applicables à une gamme de
protecteurs laser passifs, temporaires ou permanents (dans la suite appelés écrans), destinés à la protection
contre le rayonnement laser. La présente norme comprend des méthodes d'essai pour les performances
fonctionnelles ainsi que des spécifications pour la documentation à fournir avec le produit. Les écrans sont conçus
pour protéger l'utilisateur de l'émission incontrôlée de rayonnement direct et/ou diffus pour une exposition définie
aux lasers, basée sur les spécifications fonctionnelles nécessaires pour toute application particulière déterminée
par les principes d'analyse du risque.
La présente norme s'applique aux écrans surveillés pour les installations des postes de travail où le rayonnement
laser atteint une puissance moyenne maximale de 100 W ou une énergie maximale par impulsion de 30 J, dans la
bande spectrale de 180 nm (0,18 μm) à 106 nm (1 000 μm).
La présente norme ne s'applique qu'à la protection contre le rayonnement laser. Elle ne s'applique pas aux autres
risques, y compris les risques dus au rayonnement secondaire qui peuvent apparaître, par exemple, pendant le
traitement des matériaux.
De plus, la présente norme donne des indications pour le choix de tels écrans.
Ne sont pas traités dans cette norme :
- les enceintes et capotages laser qui font partie d'un équipement laser, ou qui sont fournis pour être incorporés à
un système laser et former un équipement laser (selon la CEI 60825-1:1998) ;
- tout écran qui ne protège que dans une gamme réduite d'angles d'incidence (par exemple certains filtres
interférentiels).
Zasloni pri delu z laserji - Varovalne zahteve in preskušanje
General Information
Relations
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Screens for laser working places - Safety requirements and testingZasloni pri delu z laserji - Varovalne zahteve in preskušanjeEcrans pour postes de travail au laser - Exigences et essais de sécuritéAbschirmungen an Laserarbeitsplätzen - Sicherheitstechnische Anforderungen und PrüfungTa slovenski standard je istoveten z:EN 12254:1998+A2:2008SIST EN 12254:1999+A2:2008en,fr,de31.26013.340.2013.280ICS:SLOVENSKI
STANDARDSIST EN 12254:1999+A2:200801-maj-2008
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12254:1998+A2
January 2008 ICS 13.280; 13.340.20; 31.260 Supersedes EN 12254:1998 English Version
Screens for laser working places - Safety requirements and testing
Ecrans pour postes de travail au laser - Exigences et essais de sécurité
Abschirmungen an Laserarbeitsplätzen - Sicherheitstechnische Anforderungen und Prüfung This European Standard was approved by CEN on 16 October 1998, includes Amendment 1 approved by CEN on 1 August 2002 and
Amendment 2 approved by CEN on 26 December 2007.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving 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 versions (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, Belgium, Bulgaria, 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.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36
B-1050 Brussels © 2008 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12254:1998+A2:2008: E
EN 12254:1998+A2:2008 (E) 2 Contents Page Foreword.3 1 Scope.4 2 Normative references.4 3 Definitions.5 4 Requirements.5 4.1 Spectral transmittance.5 4.2 Stability to laser radiation.5 4.3 Stability to UV radiation.5 4.4 Stability at elevated temperature.5 4.5 Mechanical strength.6 4.6 Resistance to ignition.6 5 Testing.6 5.1 Spectral transmittance.6 5.2 Stability to laser radiation.6 5.3 Stability to UV radiation.9 5.4 Stability at elevated temperature.9 5.5 Mechanical strength.9 5.5.1 Flexible screens.9 5.5.2 Inflexible screens.10 5.5.3
!!!!Resistance to ignition"""".10 6 Marking.11 7 Information supplied by the manufacturer.11 Annex A (informative)
Principles.13 A.1 Limiting values.13 A.2 Time base used to calculate the MPE values.13 A.3 Stability to laser radiation.13 Annex B (informative)
Selection of screens for laser working places.15 B.1 General.15 B.2 Pulsed lasers.15 B.3 !!!!Caution for users of laser safety screens.17 Annex ZA (informative)
!!!!Relationship between this European Standard and the Essential Requirements of EU Directive 98/37/EC.18 Annex ZB (informative)
####Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC.19
EN 12254:1998+A2:2008 (E) 3 Foreword This document (EN 12254:1998+A2:2008) has been prepared by Technical Committee CEN/TC 85 “Eye protective equipment”, the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by July 2008, and conflicting national standards shall be withdrawn at the latest by July 2008. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). For relationship with EU Directive(s), see informative Annexes ZA and ZB which are integral parts of this document. This document supersedes EN 12254:1998. This document includes Amendment 1, approved by CEN on 2002-08-01 and Amendment 2, approved by CEN on 2007-12-26. The start and finish of text introduced or altered by amendment is indicated in the text by tags ! "
and # $. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, 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 the United Kingdom.
EN 12254:1998+A2:2008 (E) 4 1 Scope This standard specifies specific functional requirements and a product labelling system applicable to a range of temporary and permanent passive guards (in the following called screens) for protection against laser radiation. This standard includes test methods for testing functional performance and also the specification of the user documentation to be supplied with the product. The screens are designed to protect the user from uncontrolled emission of direct and/or diffuse radiation for a defined exposure to lasers, based on the necessary functional requirements for any particular application being determined by risk assessment principles. This 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 within the spectral range between 180 nm (0,18 µm) and 106 nm (1000 µm). This 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 standard gives guidance on how to select such screens. The following are not considered to be within the scope of the standard: 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 IEC 60 825-1:1998); any screen whose protective properties are limited to a restricted range of angles of incidence (e.g. some interference filters) 2 Normative references This European Standard incorporates by dated or undated reference provisions by other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent revisions to or amendments of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references, the latest edition of the publication referred to applies. EN 165:1995, Personal eye-protection - Vocabulary. EN 166:1995, Personal eye-protection - Specifications. EN 168:1995, Personal eye-protection - Non-optical test methods. EN 169:1992, Personal eye-protection - Filters for welding and related techniques - Transmittance requirements and recommended utilisation EN 1598:1997, Health and safety in welding and allied processes - Transparent welding curtains, strips and screens for arc welding processes IEC 60825-1:1998, Safety of laser products - Part 1: Equipment classification, requirements and user's guide IEC 60050-845:1987, International electrotechnical vocabulary - Chapter 845: Lighting IEC 60 825-4:1997, Safety of laser products - Part 4: Laser guards ISO 1184:1983, Plastics - Determination of tensile properties of films.
EN 12254:1998+A2:2008 (E) 5 3 Definitions For the purposes of this standard the definitions and terminology of IEC 60 825-1:1998, EN 165:1995, IEC 60825-4:1997 and IEC 60050-845:1987 apply. 4 Requirements 4.1 Spectral transmittance The relationship between spectral transmittance at the laser wavelength and stability to laser radiation is based on the maximum permissible exposure (MPE) shown in IEC 60 825-1:1998. To simplify product specification, tests are conducted for laser test 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, in seconds Number of pulses D
(Continuous wave (CW) laser) I
(Pulsed laser) R
(Giant-pulsed laser) M
(Mode-coupled pulsed laser) 100 10-6 to 10-2 10-9 to 10-6 ≤ 10-9 1 1000 1000 100 000 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 about 100 s.
4.2 Stability 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 to UV radiation The requirements of 4.1 to 4.2 shall be met after exposure for 50 h as specified in clause 6 of EN 168:1995. The spectral transmittance at the laser wavelengths shall not exceed the maximum permissible spectral transmittance of the corresponding scale number. 4.4 Stability at elevated temperature The requirements of 4.1 to 4.2 shall be met after the screens have been stored for 5 h in a climatic cabinet at a temperature of (55 + 2)°C and a relative humidity of at least 95 %, and then stored for at least 2 h at room temperature (23 + 5)°C. !deleted text"
EN 12254:1998+A2:2008 (E) 6 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 with 7.1.4.2 of EN 166:1995. 4.6 Resistance to ignition Flexible screens shall satisfy the requirements of 3.4 of EN 1598:1997 when tested in accordance with 4.4 of EN 1598:1997. Inflexible screens shall meet requirements according to 7.1.7 of EN 166:1995. 5 Testing The testing schedule in table 3 applies to type testing of flexible and inflexible screens. At least 18 samples are required 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. 5.1 Spectral transmittance The spectral transmittance shall be determined at normal incidence. 5.2 Stability to laser radiation Testing shall be done with laser radiation of the specific wavelength(s) and the power and energy densities as indicated in table 2. Spectral transmittance at the laser wavelength shall be measured during irradiation.
EN 12254:1998+A2:2008 (E) 7
!!!!Table 2 — Scale numbers of screens for laser working places (maximum spectral transmittance and resistance to laser radiation)
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 to 1050 nm > 1050 nm to 1400 nm > 315 nm to 1400 nm > 1400 nm to 106 nm
Maximum spectral trans-mittance at the laser wave-length For test condition/pulse duration in s (see Table 1) Scale number ττττ (λλλλ) D I, R M D D I, R M D I, R M
> 0,25 > 10-9 to 0,25 ≤ 10–9 > 5·10-3 > 2·10-3 > 10–9 to 0,01 ≤ 10–9 > 0,1 > 10-9 to 0,1 ≤ 10-9
ED HI, R EM ED ED HI, R HM ED HI, R EM
W/m2 J/m2 W/m2 W/m2 W/m2 J/m2 J/m2 W/m2 J/m2 W/m2 A1 10–1 0,01 3·102 3·1011 10 2,5·102 0,05 0,0015 104 103 1012 A2 10–2 0,1 3·103 3·1012 102 2,5·103 0,5 0,015 105 104 1013 A3 10–3 1 3·104 3·1013 103 2,5·104 5 0,15 106 105 1014 A4 10–4 10 3·105 3·1014 104 2,5·105 50 1,
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