1、July 2009DEUTSCHE NORM English price group 13No part of this standard 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 13.340.20!$Xt“1538193www.
2、din.deDDIN EN 379Personal eye-protection Automatic welding filters (includes Amendment A1:2009)English version of DIN EN 379:2009-07Persnlicher Augenschutz Automatische Schweierschutzfilter (enthlt nderung A1:2009)Englische Fassung DIN EN 379:2009-07SupersedesDIN EN 379:2003-12www.beuth.deDocument c
3、omprises 25 pagesDIN EN 379:2009-07 2 National foreword This standard has been prepared by Technical Committee CEN/TC 85 “Eye protective equipment” (Secretariat: AFNOR, France). The responsible German body involved in its preparation was the Normenausschuss Feinmechanik und Optik (Optics and Precisi
4、on Mechanics Standards Committee), Technical Committee NA 027-01-01 AA Augenschutz. The DIN Standard corresponding to the International Standard referred to in this document is as follows: ISO 9211-2 DIN ISO 9211-2 Amendments This standard differs from DIN EN 379:2003-12 as follows: a) Requirements
5、for the viewing area have been specified. Previous editions DIN 4647-7: 1982-10 DIN EN 379: 1994-06, 1998-07, 2003-12 National Annex NA (informative) Bibliography DIN ISO 9211-2:2001-07, Optics and optical instruments Optical coatings Part 2: Optical properties EUROPEAN STANDARD NORME EUROPENNE EURO
6、PISCHE 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 loeil Filtres de soudage automatique Persnlicher Augenschutz Automatische Schweierschutzfilter This European Standard was approved by
7、 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 EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and
8、 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 translationunder the responsibi
9、lity 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,
10、 Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marn
11、ix 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: EEN 379:2003+A1:2009 (E) 2 Contents Page Foreword 31 Scope 42 Normative references 43 Terms and definitions .44 Requirements .64.1 Genera
12、l requirements 64.2 Particular requirements 64.3 Additional requirements .64.3.1 Power off .64.3.2 Transmittance 64.3.3 Variations in luminous transmittance74.3.4 Switching time 84.3.5 Manual control of dark scale number 84.3.6 Diffusion of light 84.3.7 Angle dependence of luminous transmittance !de
13、leted text“ .94.4 Spectral sensitivity of welding filters with automatic scale number setting .94.5 Viewing area .95 Test methods . 105.1 Power off test 105.2 Measurement of switching time 105.2.1 Test equipment . 105.2.2 Performance of test equipment . 105.2.3 Measurement . 105.2.4 Calculation . 10
14、5.3 Scale number setting of welding filters with automatic scale number setting 105.3.1 Test equipment . 105.3.2 Measurement of the scale number setting . 115.4 Spectral sensitivity of welding filters with automatic scale number setting 115.4.1 General . 115.4.2 Method using monochromatic radiation
15、115.4.3 Method using cut-off filters . 115.5 Angle dependence of luminous transmittance 125.6 Test schedule for type examination 136 Marking 146.1 General . 146.2 Automatic welding filters and automatic welding filters with manual scale number setting . 146.3 Welding filter with automatic scale numb
16、er setting 147 Information to be supplied by the manufacturer . 15Annex A (informative) Guidance on selection and use 16A.1 General . 16A.1.1 Scale numbers to be used for gas welding and braze welding . 16A.1.2 Scale numbers to be used for oxygen cutting . 17A.1.3 Scale numbers to be used for plasma
17、 jet cutting 17A.1.4 Scale numbers to be used for electric arc welding or air-arc gouging . 17A.1.5 Scale numbers of filters to be used by welders assistants 17A.2 Remarks . 19Annex B (informative) Uncertainty of measurement and results interpretation 20B.1 Test report and uncertainty of measurement
18、 20Annex ZA (informative) Clauses of this European Standard addressing essential requirements or other provisions of EU Directives . 22Bibliography . 23DIN EN 379:2009-07 EN 379:2003+A1:2009 (E) 3 Foreword This document (EN 379:2003+A1:2009) has been prepared by Technical Committee CEN/TC 85 “Eye-pr
19、otective 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
20、 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
21、 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
22、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 Europe
23、an 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 Kingd
24、om. DIN EN 379:2009-07 EN 379:2003+A1:2009 (E) 4 1 Scope This European standard specifies requirements for automatic welding filters which switch their luminous transmittance to a lower predetermined value when a welding arc is ignited (referred to as welding filters with switchable scale numbers).
25、It also specifies requirements for automatic welding filters which switch their luminous transmittance to a lower value, where the lower value of luminous transmittance is set automatically in dependence on the illuminance generated by the welding arc (referred to as welding filters with automatic s
26、cale number setting). The requirements of this standard apply if such a filter is to be used for continuous viewing of the welding process, (including gas welding and cutting), and if it is to be used only during the period when the arc is being ignited. These filters are used in welders eye protect
27、ors or are fixed to equipment. If they are to be used in welders eye protectors, other applicable requirements for these types of filters are given in EN 166. The requirements for the frames/mountings to which they are intended to be fitted are given in EN 175. Guidance on the selection and use of t
28、hese 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 appl
29、ies. 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 !
30、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 de
31、finitions 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 s
32、cale 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 weldi
33、ng arc is ignited DIN EN 379:2009-07 EN 379:2003+A1:2009 (E) 5 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 numbe
34、r the scale number corresponding to the maximum value of luminous transmittance 1(see Figure 1) 5 10 11 12 13 14 1- d- 2Light 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 a
35、utomatic 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 dreached after the ignition of the welding arc by an automatic welding filter (see Figure
36、1) 3.4 darkest state scale number the highest scale number corresponding to the minimum value of luminous transmittance 2of an automatic welding filter claimed by the manufacturer (see Figure 1) 3.5 switching time the switching time tsof an automatic welding filter is defined by the following integr
37、al: =)3)(01s2d)(1ttttttt where t = 0 is the time at which the arc ignites; (t) is luminous transmittance at a time t after the ignition of the welding arc; t = t ( (t)=32) is the time at which the luminous transmittance falls to 3 times the luminous transmittance in the darkest state. NOTE In the ca
38、se of short term exposure to light, the glare is approximately proportional to the product of the illuminance at the eye and time. The time relationship of the darkening process can be very different depending on the construction of the welding filter with switchable scale number. It is therefore ap
39、propriate to define the switching time as an integral of the luminous transmittance over time and not merely by the initial and final luminous transmittances. DIN EN 379:2009-07 EN 379:2003+A1:2009 (E) 6 3.6 cut-off filter a filter with a range of low spectral transmittance (cut-off band) followed b
40、y a range with high spectral transmittance (pass-band) or vice versa, with properties described according to ISO 9211-2:1994. !3.7 viewing area area not opaque used by the wearer to view the task and meets the requirements of the stated filter scale number“ 4 Requirements 4.1 General requirements Au
41、tomatic welding filters shall comply with requirements given in Table 1. These requirements shall be met for the highest possible scale number as may be set under either automatic setting (including manual offset) or manual setting. Table 1 - General requirements Property RequirementSpherical, astig
42、matic and prismatic refractive powers EN 166:2001, 7.1.2.1.2 Luminous transmittance EN 169:2002, Table 1 Variations in luminous transmittance 4.3.3 Spectral transmittance EN 169:2002, Table 1 Diffusion of light 4.3.6 Quality of material and surface EN 166:2001, 7.1.3 Robustness of construction EN 16
43、6:2001, 7.1.4 Resistance to ultraviolet radiation EN 166:2001, 7.1.5.2, but replacing 7.1.5.2 b) by 4.3.6 of this European standard Resistance to ignition EN 166:2001, 7.1.7 4.2 Particular requirements Where a manufacturer wishes to claim compliance with particular requirements, these requirements s
44、hall be as specified in EN 166:2001, 7.2.2 to 7.2.8 and 7.3. 4.3 Additional requirements 4.3.1 Power off When tested according to 5.1, automatic welding filters shall be no more than nine scale numbers lighter than the darkest state scale number. 4.3.2 Transmittance 4.3.2.1 The requirements of 4.3.2
45、.2, 4.3.2.3 and 4.3.2.4 shall be satisfied when the transmittances are measured as described in EN 167:2001, 6, using standard illuminant A. 4.3.2.2 The minimum luminous transmittance in the light state shall be 0,16% when measured at both (-5 2)oC and (55 2)oC. DIN EN 379:2009-07 EN 379:2003+A1:200
46、9 (E) 7 4.3.2.3 The luminous transmittance requirements given in EN 169:2002, Table 1, shall apply to both light and dark states ( 1, d and 2). The measurements shall be taken at both (- 5 2)oC and (55 2)oC. 4.3.2.4 The spectral transmittance in the ultraviolet and the mean transmittance in the infr
47、ared, as given in EN 169:2002, Table 1, and the additional requirements (a) to (d) of EN 169:2002, 5.2, required for the darkest state scale number, shall also apply to all other states. The measurements shall be taken at a temperature of (23 5)oC. 4.3.2.5 In the case of welding filters with automat
48、ic scale number setting, this setting of the dark state scale number shall meet the following requirements: a) The dark state scale number N(Ev) shall depend on the illuminance Evas follows: )lx/log(25,293,2)(vvEEN += Some values calculated from this formula are given as examples in Table 2, for scale numbers between 8 and 14: Table 2 - Dark state scale number Dark state scale number Scale number N 8 9 10 11 12 13 14 Illuminance / lx 180 500 1 400 3 900 10 700 30 000 83 000 b) The scale number set in dependence on the illuminance at the filter front s
