SIST EN 379:2003+A1:2009

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Persönlicher Augenschutz - Automatische SchweißerschutzfilterProtection individuelle de l'oeil - Filtres de soudage automatiquePersonal eye-protection - Automatic welding filters25.160.01Varjenje, trdo in mehko spajkanje na splošnoWelding, brazing and soldering in general13.340.20Varovalna oprema za glavoHead protective equipmentICS:Ta slovenski standard je istoveten z:EN 379:2003+A1:2009SIST EN 379:2003+A1:2009en,de01-julij-2009SIST EN 379:2003+A1:2009SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 379:2003+A1
April 2009 ICS 13.340.20 Supersedes EN 379:2003English Version
Personal eye-protection - Automatic welding filters
Protection individuelle de l'oeil - Filtres de soudage automatique
Persönlicher Augenschutz - Automatische Schweißerschutzfilter This European Standard was approved by CEN on 1 August 2003 and includes Amendment 1 approved by CEN on 24 February 2009.
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:
Avenue Marnix 17,
B-1000 Brussels © 2009 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 379:2003+A1:2009: ESIST EN 379:2003+A1:2009

Guidance on selection and use . 16A.1General . 16A.1.1Scale numbers to be used for gas welding and braze welding . 16A.1.2Scale numbers to be used for oxygen cutting . 17A.1.3Scale numbers to be used for plasma jet cutting . 17A.1.4Scale numbers to be used for electric arc welding or air-arc gouging . 17A.1.5Scale numbers of filters to be used by welders’ assistants . 17A.2Remarks . 19Annex B (informative)
Uncertainty of measurement and results interpretation . 20B.1Test report and uncertainty of measurement . 20Annex ZA (informative)
Clauses of this European Standard addressing essential requirements or other provisions of EU Directives . 22Bibliography . 23SIST EN 379:2003+A1:2009

Foreword This document (EN 379:2003+A1:2009) 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 October 2009, and conflicting national standards shall be withdrawn at the latest by October 2009. This document includes Amendment 1, approved by CEN on 2009-02-24. This document supersedes !EN 379:2003". The start and finish of text introduced or altered by amendment is indicated in the text by tags ! ". 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. For relationship with EU Directive, see informative Annex ZA, which is an integral part of this document. Annexes A and B are informative. In the revision of this European standard, and that of EN 169, which was performed concurrently, it was decided to remove from EN 379 welding filters with dual scale numbers and include them within EN 169. 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 United Kingdom. SIST EN 379:2003+A1:2009

Guidance on the selection and use of these filters is given in annex A. The specifications for welding filters without switchable luminous transmittance are given in EN 169. 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 167:2001, Personal eye-protection – Optical test methods !deleted text" EN 169:2002 !deleted text", Personal eye-protection – Filters for welding and related techniques – Transmittance requirements and recommended use ISO 9211-2:1994, Optics and optical instruments – Optical coatings – Part 2: Optical properties !ISO 11664-2:2007, Colorimetry – Part 2: CIE standard illuminants" 3 Terms and definitions For the purposes of this European Standard, the terms and definitions given in !EN 165:2005" and the following apply. 3.1 automatic welding filter
a protective filter which automatically switches its scale number from a lower value (light state scale number) to a higher value (dark state scale number) when the welding arc is ignited 3.1.1 automatic welding filter with manual scale number setting a protective filter which automatically switches its scale number from a lower value (light state scale number) to a higher value (dark state scale number) selected by the user when the welding arc is ignited SIST EN 379:2003+A1:2009

3.1.2 automatic welding filter with automatic scale number setting a welding filter with switchable scale number, in which the dark state scale number depends upon the illuminance generated by the welding arc. 3.2 light state scale number the scale number corresponding to the maximum value of luminous transmittance τ 1(see Figure 1)
τ1
--------------------------- τd -------------------------------
τ2
Light state Lightest dark state Intermediate dark state Darkest state
scale number scale number scale number Figure 1 - Example showing the meaning of the terms in the case of an automatic welding filter with a light state scale number of 5 and dark state scale numbers between 10 and 14 3.3 dark state scale number
the scale number corresponding to the value of the luminous transmittance τd reached after the ignition of the welding arc by an automatic welding filter (see Figure 1) 3.4 darkest state scale number the
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