Screens for laser working places - Safety requirements and testing

This standard specifies functional requirements and a product labelling applicable to 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 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 time limited exposure to laser radiation, based on the functional requirements determined by risk assessment.
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 (1 000 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.
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.

Abschirmungen an Laserarbeitsplätzen - Sicherheitstechnische Anforderungen und Prüfung

Diese Europäische Norm legt Anforderungen an die Funktion sowie eine Produkt Kennzeichnung für zeitweilige und permanente passive Schutzwände zum Schutz gegen Laserstrahlung (nachfolgend Abschirmungen genannt) fest. Diese Norm enthält Prüfverfahren für die Funktion und die Benutzerinformation, die mit dem Produkt zu liefern ist. Die Abschirmungen sind konstruiert, um den Benutzer zu schützen gegen:
   unbeabsichtigte Bestrahlung durch direkte und/oder gestreute Laserstrahlung;
   eine zeitlich begrenzte Laserbestrahlung auf der Grundlage der durch eine Risikobewertung festgestell¬ten funktionalen Anforderungen.
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 innerhalb des Spektralbereichs von 180 nm (0,18 µm) bis 106 nm (1 000 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 eine Anleitung zur Auswahl solcher Abschirmungen.
Laserumschließungen und  gehäuse, die als Teil der Lasereinrichtung oder zum Anbau an ein Lasersystem geliefert werden, um eine Lasereinrichtung (nach EN 60825 1) zu bilden, werden nicht als Bestandteil des Anwendungsbereichs der Norm angesehen.

Écrans pour postes de travail au laser - Exigences et essais de sécurité

La présente Norme européenne spécifie les exigences fonctionnelles et l'étiquetage applicables aux protecteurs laser passifs, temporaires ou permanents (par 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 :
-   d’une exposition involontaire au rayonnement laser direct et/ou diffus ;
-   d’une exposition limitée dans le temps au rayonnement laser fondée sur les spécifications fonctionnelles déterminées par une analyse du risque.
La présente Norme européenne 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 d’impulsion de 30 J, dans le domaine spectral de 180 nm (0,18 m) à 106 nm (1 000 m).
La présente Norme européenne s'applique uniquement 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.
En outre, la présente Norme européenne donne des indications pour le choix de tels écrans.
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 l’EN 60825-1) ne relèvent pas du domaine d’application de la présente norme.

Zasloni pri delu z laserji - Varovalne zahteve in preskušanje

Ta evropski standard opredeljuje funkcionalne zahteve in etiketiranje proizvodov, ki se uporablja za začasna in stalna pasivna varovala (v nadaljevanju: zasloni) za zaščito pred laserskim sevanjem. Ta standard zajema metode preskušanja za preskušanje funkcionalnega delovanja in specifikacijo dokumentacije za uporabnika, ki mora biti dobavljena s proizvodom. Zasloni so zasnovani za zaščito uporabnika pred: nenamerno izpostavljenostjo neposrednemu in/ali razpršenemu laserskemu sevanju; časovno omejeno izpostavljenostjo laserskemu sevanju, osnovano na funkcionalnih zahtevah, ki jih opredeljuje ocena tveganja. Ta evropski standard se uporablja za nadzorovane zaslone za objekte in naprave na delovnih mestih, kjer je lasersko sevanje do najvišje povprečne moči 100 W ali pulzirajoče enosmerne energije 30 J, v območju spektra med 180 nm (0,18 μm) in 106 nm (1 000 μm). Ta evropski standard se uporablja samo za zaščito pred laserskim sevanjem. Ta standard se ne uporablja za druge nevarnosti, vključno z nevarnostmi, ki izvirajo iz sekundarnega sevanja, do katerega lahko pride med, na primer predelavo materiala. Ta evropski standard podaja vodilo, kako izbrati takšne zaslone. Ograde in ohišja laserjev, ki so dobavljeni kot del laserskega proizvoda ali so dobavljeni z namenom, da bi bili pritrjeni na laserski sistem, s čimer tvorijo laserski proizvod (v skladu z EN 60825-1), se ne štejejo v področje uporabe tega standarda.

General Information

Status
Published
Publication Date
23-Mar-2010
Current Stage
9060 - Closure of 2 Year Review Enquiry - Review Enquiry
Due Date
03-Jun-2020
Completion Date
03-Jun-2020

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Zasloni pri delu z laserji - Varovalne zahteve in preskušanjeAbschirmungen an Laserarbeitsplätzen - Sicherheitstechnische Anforderungen und PrüfungEcrans pour postes de travail au laser - Exigences et essais de sécuritéScreens for laser working places - Safety requirements and testing31.260Optoelektronika, laserska opremaOptoelectronics. Laser equipment13.340.20Varovalna oprema za glavoHead protective equipment13.280Varstvo pred sevanjemRadiation protectionICS:Ta slovenski standard je istoveten z:EN 12254:2010SIST EN 12254:2010en,fr,de01-junij-2010SIST EN 12254:2010SLOVENSKI

STANDARDSIST EN 12254:1999+A2:20081DGRPHãþD
SIST EN 12254:2010
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12254
March 2010 ICS 13.280 Supersedes EN 12254:1998+A2:2008English Version
Screens for laser working places - Safety requirements and testing
Écrans 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 20 February 2010.

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, 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.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
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. Ref. No. EN 12254:2010: ESIST EN 12254:2010

EN 12254:2010 (E) 2 Contents Page Foreword ..............................................................................................................................................................31Scope ......................................................................................................................................................42Normative references ............................................................................................................................43Terms and definitions ...........................................................................................................................54Requirements .........................................................................................................................................54.1Spectral transmittance ..........................................................................................................................54.2Resistance to laser radiation ................................................................................................................54.3Stability to UV radiation ........................................................................................................................54.4Stability to elevated temperature .........................................................................................................54.5Mechanical strength ..............................................................................................................................54.6Resistance to ignition ...........................................................................................................................65Testing ....................................................................................................................................................65.1General ....................................................................................................................................................65.2Spectral transmittance ..........................................................................................................................65.3Resistance to laser radiation ................................................................................................................65.4Stability to UV radiation and stability at elevated temperature ........................................................85.4.1Stability to UV radiation ........................................................................................................................85.4.2Stability at elevated temperature .........................................................................................................85.5Mechanical strength ..............................................................................................................................85.5.1Flexible screens .....................................................................................................................................85.5.2Inflexible screens ...................................................................................................................................95.5.3Resistance to ignition ...........................................................................................................................96Marking ................................................................................................................................................ 107Information supplied by the manufacturer ...................................................................................... 11Annex A (informative)

Principles .................................................................................................................... 12A.1Limit values ......................................................................................................................................... 12A.2Time base used to calculate the MPE values .................................................................................. 12A.3Resistance to laser radiation ............................................................................................................. 12A.4Example test report ............................................................................................................................ 14Annex B (informative)

Selection of screens for laser working places ........................................................ 16B.1General ................................................................................................................................................. 16B.2Pulsed lasers ....................................................................................................................................... 16B.3Caution 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 Essential Requirements of EU Directive 2006/42/EC ....................................................................................... 19Bibliography ..................................................................................................................................................... 20 SIST EN 12254:2010

EN 12254:2010 (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 Standard 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 elements 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 European 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 countries 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, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. SIST EN 12254:2010

EN 12254:2010 (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 protection 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 time 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 within the spectral range between 180 nm (0,18 µm) and 106 nm (1 000 µm). 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 European 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 Normative 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-protection — 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 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 60825-4:2006)

IEC 60050-845:1987, International Electrotechnical Vocabulary — Chapter 845: Lighting

SIST EN 12254:2010

EN 12254:2010 (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 60050-845:1987 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 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 s Number of pulses D (continuous wave (CW) laser) 100 1 I (pulsed laser) 10-6 to 10-2 1 000 R (Giant pulsed laser) 10-9 to 10-6 1 000 M (Mode-coupled pulsed laser) ≤ 10-9 100 000 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 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 to 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 temperature 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 7.1.4.2 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. SIST EN 12254:2010

EN 12254:2010 (E) 6 4.6 Resistance to ignition Flexible screens shall satisfy the requirements of 4.4 of EN 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 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. 5.2 Spectral transmittance The spectral transmittance shall be determined at normal incidence. Screens with angular-dependent transmittance 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 wavelength(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. SIST EN 12254:2010

EN 12254:2010 (E) 7
Table 2 — Scale numbers of screens for laser working places
(maximum spectral 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 > 1 400 nm to 106 nm 1 050 nm1 400 nm 1 400 nm

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 AB1 10–1 0,01 3·102 3·1011 10 2,5·102 0,05 0,0015 104 103 1012 AB2 10–2 0,1 3·103 3·1012 102 2,5·103 0,5 0,015 105 104 1013 AB3 10–3 1 3·104 3·1013 103 2,5·104 5 0,15 106 105 1014 AB4 10–4 10 3·105 3·1014 104 2,5·105 50 1,5 107 106 1015 AB5 10–5 102 3·106 3·1015 105 2,5·106 5·102 15 108 107 1016 AB6 10–6 103 3·107 3·1016 106 2,5·107 5·103 1,5·102 109 108 1017 AB7 10–7 104 3·108 3·1017 107 2,5·108 5·104 1,5·103 1010 109 1018 AB8 10–8 105 3·109 3·1018 108 2,5·109 5·105 1,5·104 1011 1010 1019 AB9 10–9 106 3·1010 3·1019 109 2,5·1010 5·106 1,5·105 1012 1011 1020 AB10 10–10 107 3·1011 3·1020 1010 2,5·1011 5·107 1,5·106 1013 1012 1021

The values of energy density (H) in Table 2 for testing the resistance against laser radiation for pulsed lasers (I, R, M) should be multiplied with the factor N-1/4, where N is the number of pulses in 100 s. For pulsed lasers, testing should be done with low repetition rates (≤ 25 Hz). If not possible, the energy density used for testing shall be given and the product shall be marked in accordance with Clause 6. The diameter d63 of the laser beam during this test shall be (1 ± 0,1) mm. The testing period is indicated in Table 1. For pulse durations < 1 ns the diameter d63 of the laser beam during this test shall be ≥ 0,5 mm. NOTE The pulse lengths for test conditions I and R do not follow consecutively. Neither are they a continuation of the length for test condition D. The pulse lengths indicated are characteristic values of typical lasers. It is recommended to use a laser with a pulse length in this range. All screens

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