07-30163894-DC.pdf
a Date: 21 March 2007 Origin: International Latest date for receipt of comments: 30 June 2007 Project no.: 2007/00709 Responsible committee: EPL/76 Optical radiation safety and laser equipment Interested committees: Title: Draft BS EN 60825-4 A1 ED.2 Amendment to IEC 60825-4 Ed.2: New Annex G on beam delivery systems Supersession information: If this document is published as a standard, the UK implementation of it will supersede NONE and partially supersede NONE . If you are aware of a current national standard which may be affected, please notify the secretary (contact details below). WARNING: THIS IS A DRAFT AND MUST NOT BE REGARDED OR USED AS A BRITISH STANDARD. THIS DRAFT IS NOT CURRENT BEYOND 30 June 2007. This draft is issued to allow comments from interested parties; all comments will be given consideration prior to publication. No acknowledgement will normally be sent. See overleaf for information on commenting. No copying is allowed, in any form, without prior written permission from BSI except as permitted under the Copyright, Designs and Patent Act 1988 or for circulation within a nominating organization for briefing purposes. Electronic circulation is limited to dissemination by e-mail within such an organization by committee members. Further copies of this draft may be purchased from BSI Customer Services, Tel: +44(0) 20 8996 9001 or email ordersbsi-global.com. British, International and foreign standards are also available from BSI Customer Services. British Standards on CD or Online are available from British Standards Publishing Sales Limited. Tel: 01344 404409 or email bsonlinetechindex.co.uk. Information on the co-operating organizations represented on the committees referenced above may be obtained from the responsible committee secretary. Cross-references The British Standards which implement International or European publications referred to in this draft may be found via the British Standards Online Service on the BSI web site http:/www.bsi-global.com. Direct tel: 020 8996 7205 Responsible Committee Secretary: Mr A Ashrafi (BSI) E-mail: asghar.ashrafibsi-global.com Draft for Public Comment Head Office 389 Chiswick High Road London W4 4AL Telephone: +44(0)20 8996 9000 Fax: +44(0)20 8996 7001 Form 36 Version 7.0 DPC: 07/30163894 DC Licensed Copy: London South Bank University, London South Bank University, Sun Apr 01 14:51:55 GMT+00:00 2007, Uncontrolled Copy, (c) BSI b Introduction This draft standard is based on international discussions in which the UK has taken an active part. Your comments on this draft are welcome and will assist in the preparation of the consequent standard. If no comments are received to the contrary, then the UK will approve this draft. There is a high probability that this text could be adopted by CENELEC as a reference document for harmonization or as a European Standard. Recipients of this draft are requested to comment on the text bearing in mind this possibility. UK Vote Please indicate whether you consider the UK should submit a negative (with reasons) or positive vote on this draft. Submission The guidance given below is intended to ensure that all comments receive efficient and appropriate attention by the responsible BSI committee. Annotated drafts are not acceptable and will be rejected. All comments must be submitted, preferably electronically, to the Responsible Committee Secretary at the address given on the front cover. Comments should be compatible with Version 6.0 or Version 97 of Microsoft® Word for Windows, if possible; otherwise comments in ASCII text format are acceptable. Any comments not submitted electronically should still adhere to these format requirements. All comments submitted should be presented as given in the example below. Further information on submitting comments and how to obtain a blank electronic version of a comment form are available from the BSI web site at:http:/www.bsi-global.com/British_Standards/Getting_involved/DPCs/instructions.xalter Template for comments and secretariat observations Date: xx/xx/200x Document: ISO/DIS xxxxx 1 2 (3) 4 5 (6) (7) MB Clause No./ Subclause No./ Annex (e.g. 3.1) Paragraph/ Figure/Table/ Note (e.g. Table 1) Type of com- ment Comment (justification for change) by the MB Proposed change by the MB Secretariat observations on each comment submitted 3.1 Definition 1 ed Definition is ambiguous and needs clarifying. Amend to read . so that the mains connector to which no connection . 6.4 Paragraph 2 te The use of the UV photometer as an alternative cannot be supported as serious problems have been encountered in its use in the UK. Delete reference to UV photometer. Microsoft and MS-DOS are registered trademarks, and Windows is a trademark of Microsoft Corporation. Licensed Copy: London South Bank University, London South Bank University, Sun Apr 01 14:51:55 GMT+00:00 2007, Uncontrolled Copy, (c) BSI FORM CDV (IEC) 2005-09-23 76/362/CDV COMMITTEE DRAFT FOR VOTE (CDV) PROJET DE COMITÉ POUR VOTE (CDV) Project number IEC 60825-4 A1 Ed.2 Numéro de projet IEC/TC or SC: TC76 CEI/CE ou SC: Secretariat / Secrétariat USA Submitted for parallel voting in CENELEC Soumis au vote parallèle au CENELEC Date of circulation Date de diffusion 2007-03-16 Closing date for voting (Voting mandatory for P-members) Date de clôture du vote (Vote obligatoire pour les membres (P) 2007-08-17 Also of interest to the following committees Intéresse également les comités suivants Supersedes document Remplace le document 76/360/MCR Functions concerned Fonctions concernées Safety Sécurité EMC CEM Environment Environnement Quality assurance Assurance qualité CE DOCUMENT EST TOUJOURS À L'ÉTUDE ET SUSCEPTIBLE DE MODIFICATION. IL NE PEUT SERVIR DE RÉFÉRENCE. LES RÉCIPIENDAIRES DU PRÉSENT DOCUMENT SONT INVITÉS À PRÉSENTER, AVEC LEURS OBSERVATIONS, LA NOTIFICATION DES DROITS DE PROPRIÉTÉ DONT ILS AURAIENT ÉVENTUELLEMENT CONNAISSANCE ET À FOURNIR UNE DOCUMENTATION EXPLICATIVE. THIS DOCUMENT IS STILL UNDER STUDY AND SUBJECT TO CHANGE. IT SHOULD NOT BE USED FOR REFERENCE PURPOSES. RECIPIENTS OF THIS DOCUMENT ARE INVITED TO SUBMIT, WITH THEIR COMMENTS, NOTIFICATION OF ANY RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE AND TO PROVIDE SUPPORTING DOCUMENTATION. Titre : Amendement à la CEI 60825-4 Ed.2 : nouvelle Annexe G sur les systèmes de transmission du faisceau Title : Amendment to IEC 60825-4 Ed.2 : new Annex G on beam delivery systems Note d'introduction : Introductory note: This normative annex addresses the arrangement, installation and use of guided beam delivery systems in free space and through fibre optical cables in laser processing machine applications. ATTENTION VOTE PARALLÈLE CEI CENELEC Lattention des Comités nationaux de la CEI, membres du CENELEC, est attirée sur le fait que ce projet de comité pour vote (CDV) de Norme internationale est soumis au vote parallèle. Un bulletin de vote séparé pour le vote CENELEC leur sera envoyé par le Secrétariat Central du CENELEC. ATTENTION IEC CENELEC PARALLEL VOTING The attention of IEC National Committees, members of CENELEC, is drawn to the fact that this Committee Draft for Vote (CDV) for an International Standard is submitted for parallel voting. A separate form for CENELEC voting will be sent to them by the CENELEC Central Secretariat. Copyright © 2007 International Electrotechnical Commission, IEC. All rights reserved. It is permitted to download this electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions. You may not copy or “mirror“ the file or printed version of the document, or any part of it, for any other purpose without permission in writing from IEC. Licensed Copy: London South Bank University, London South Bank University, Sun Apr 01 14:51:55 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 60825-4-A1 Ed.2/CDV © IEC 2 FOREWORD This amendment has been prepared by IEC technical committee 76: Optical radiation safety and laser equipment. The text of this amendment is based on the following documents: FDIS Report on voting 76/XX/FDIS 76/XX/RVD Full information on the voting for the approval of this amendment can be found in the report on voting indicated in the above table. The committee has decided that the contents of this amendment and the base publication will remain unchanged until the maintenance result date1 indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. _ Add, after IEC 60835-4 Annex F, the new Annex G as follows: Annex G (normative) Beam delivery Systems G.1 General This informative annex addresses the arrangement, installation and use of guided beam delivery systems in free space and through fibre optical cables in laser processing machine applications. This Annex applies to the protective measures implemented to protect personnel against laser radiation hazards for guided beam delivery systems after the protective housing of the laser (the requirements of which are specified in IEC 60825-1). This Annex in intended to compliment the requirements the laser process enclosure (which are specified in IEC 60825-4 and ISO 11553-1). This Annex also provides methods for assessing the risks (including reasonably foreseeable use, abuse and misuse) and suggests control measures to meet the requirements of the normative requirements of IEC 60825 Part 1 and Part 4. 1) The National Committees are requested to note that for this publication the maintenance result date is 2010. Licensed Copy: London South Bank University, London South Bank University, Sun Apr 01 14:51:55 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 60825-4 A1 Ed.2/CDV © IEC 3 This Annex does not apply to beam delivery systems inside the protective housing of the laser. This Annex does not apply to beam delivery systems used in medical or communications applications. G.2 Terms and definitions For the purposes of this Annex of IEC 60825-4, the following definitions apply. They are in addition to those given in IEC 60825-1 or other parts of IEC 60825-4. G.2.1 access panel For the purposes of this guideline, an access panel can mean any panel which when removed or displaced gives human access to laser radiation. Sheathing around a fibre, tubing used as an enclosure component or any device serving the function of a removable or displaceable panel, can also be an “access panel“ under the terms of this definition. G.2.2 beam delivery system The beam delivery system includes all those components, including all optical beam components in the beam path and potential beam paths and their enclosures, which when combined, transfer laser radiation emitted from the laser radiation generator (the laser) to the workpiece. These components may include all elements for guiding, shaping and switching the laser beam as well as the enclosure of and support for the beam path components. G.2.3 beam path components (IEC 60825-1 - 3.15) Beam path components are those optical components which lie on a defined beam path. Note: Examples of a beam path component include a beam steering mirror, a focus lens or a fibre optic cable connector. G.2.4 beam shaping components The beam shaping components are those optical components introduced in the beam path to transform the profile or cross-section of the laser beam by means of apertures, reflective or diffractive optical components. G.2.5 beam switching components The beam switching components are those optical components or an assembly of components introduced in the beam path to direct or divert, under external control, the beam path along predetermined direction(s). The external control allows the beam path to be switched from one predetermined direction to another. G.2.6 fibre optic cable A fibre optic cable propagates the transmission of laser radiation along a transparent medium. A fibre optic cable may have a glass or other core that carries the laser radiation and be surrounded by cladding. The outside of the fibre is protected by cladding and may be further protected by additional layers of other material such as a polymer or a metal to protect the fibre from mechanical deformation, the ingress of water, etc. For this Annex, this term also includes other forms of transmission devices such as waveguides. Licensed Copy: London South Bank University, London South Bank University, Sun Apr 01 14:51:55 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 60825-4-A1 Ed.2/CDV © IEC 4 G.3 General requirements G3.1 General considerations The risks associated with the hazards relevant to the beam delivery systems shall be assessed as part of the overall requirements for risk assessment of the machine. The principles for risk assessment given in standard ISO 14121 shall be used in carrying out this assessment. This assessment shall determine the acceptable level of risk and the necessary protective measures for persons who can be exposed to those hazards, while maintaining an acceptable level of performance of the machine. Hazards can result from, but are not limited to, the following causes: failures, faults or damage in the protective housing or other mechanical protective measure incorporated in the beam delivery system resulting in the inadvertent emission of laser radiation from the housing; failures or faults in the beam path components resulting in damage to the protective housing or other protective devices; failures or faults in the associated equipment or controls resulting in injury or malfunction or failure of the safety functions of the processing system; failures or faults from reasonably foreseeable misuse or abuse resulting in the inadvertent emission of laser radiation from the protective housings. The engineering and administrative controls adopted are a combination of the measures incorporated at the design stage and those measures required to be implemented by the user. Design shall be the first consideration in the reduction of risks. Where this is not sufficient to eliminate risks to a negligible level, additional safeguarding and safe working procedures shall be considered. Safeguarding includes the use of all types of safeguards and awareness means. NOTE: Examples of risk assessments and potential solutions for risk reduction measures are shown in Clause F6 G3.2 Protective housing Each beam delivery system shall have a protective housing which, when in place, prevents human access to laser radiation (including errant laser radiation) in excess of Class 1M or 2M AEL as applicable according to the wavelength, except when human access is necessary for the performance of the function(s) of the laser processing machine. Any parts of the protective housing of the beam delivery system that can be removed or displaced for service and which can allow access to laser ra
