1、 IEC 62479 Edition 1.0 2010-06 INTERNATIONAL STANDARD NORME INTERNATIONALE Assesment of the compliance of low-power electronic and electrical equipment with the basic restrictions related to human exposure to electromagnetic fields (10 MHz to 300 GHz) valuation de la conformit des appareils lectriqu
2、es et lectroniques de faible puissance aux restrictions de base concernant lexposition des personnes aux champs lectromagntiques (10 MHz 300 GHz) IEC 62479:2010 THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2010 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of
3、 this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either IEC or IECs member National Committee in the country of the requester. If you have any questions about IEC copyright
4、or have an enquiry about obtaining additional rights to this publication, please contact the address below or your local IEC member National Committee for further information. Droits de reproduction rservs. Sauf indication contraire, aucune partie de cette publication ne peut tre reproduite ni utili
5、se sous quelque forme que ce soit et par aucun procd, lectronique ou mcanique, y compris la photocopie et les microfilms, sans laccord crit de la CEI ou du Comit national de la CEI du pays du demandeur. Si vous avez des questions sur le copyright de la CEI ou si vous dsirez obtenir des droits supplm
6、entaires sur cette publication, utilisez les coordonnes ci-aprs ou contactez le Comit national de la CEI de votre pays de rsidence. IEC Central Office 3, rue de Varemb CH-1211 Geneva 20 Switzerland Email: inmailiec.ch Web: www.iec.ch About the IEC The International Electrotechnical Commission (IEC)
7、is the leading global organization that prepares and publishes International Standards for all electrical, electronic and related technologies. About IEC publications The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the latest edition
8、 a corrigenda or an amendment might have been published. Catalogue of IEC publications: www.iec.ch/searchpub The IEC on-line Catalogue enables you to search by a variety of criteria (reference number, text, technical committee,). It also gives information on projects, withdrawn and replaced publica
9、tions. IEC Just Published: www.iec.ch/online_news/justpub Stay up to date on all new IEC publications. Just Published details twice a month all new publications released. Available on-line and also by email. Electropedia: www.electropedia.org The worlds leading online dictionary of electronic and el
10、ectrical terms containing more than 20 000 terms and definitions in English and French, with equivalent terms in additional languages. Also known as the International Electrotechnical Vocabulary online. Customer Service Centre: www.iec.ch/webstore/custserv If you wish to give us your feedback on thi
11、s publication or need further assistance, please visit the Customer Service Centre FAQ or contact us: Email: csciec.ch Tel.: +41 22 919 02 11 Fax: +41 22 919 03 00 A propos de la CEI La Commission Electrotechnique Internationale (CEI) est la premire organisation mondiale qui labore et publie des nor
12、mes internationales pour tout ce qui a trait llectricit, llectronique et aux technologies apparentes. A propos des publications CEI Le contenu technique des publications de la CEI est constamment revu. Veuillez vous assurer que vous possdez ldition la plus rcente, un corrigendum ou amendement peut a
13、voir t publi. Catalogue des publications de la CEI: www.iec.ch/searchpub/cur_fut-f.htm Le Catalogue en-ligne de la CEI vous permet deffectuer des recherches en utilisant diffrents critres (numro de rfrence, texte, comit dtudes,). Il donne aussi des informations sur les projets et les publications re
14、tires ou remplaces. Just Published CEI: www.iec.ch/online_news/justpub Restez inform sur les nouvelles publications de la CEI. Just Published dtaille deux fois par mois les nouvelles publications parues. Disponible en-ligne et aussi par email. Electropedia: www.electropedia.org Le premier dictionnai
15、re en ligne au monde de termes lectroniques et lectriques. Il contient plus de 20 000 termes et dfinitions en anglais et en franais, ainsi que les termes quivalents dans les langues additionnelles. Egalement appel Vocabulaire Electrotechnique International en ligne. Service Clients: www.iec.ch/webst
16、ore/custserv/custserv_entry-f.htm Si vous dsirez nous donner des commentaires sur cette publication ou si vous avez des questions, visitez le FAQ du Service clients ou contactez-nous: Email: csciec.ch Tl.: +41 22 919 02 11 Fax: +41 22 919 03 00 IEC 62479 Edition 1.0 2010-06 INTERNATIONAL STANDARD NO
17、RME INTERNATIONALE Assesment of the compliance of low-power electronic and electrical equipment with the basic restrictions related to human exposure to electromagnetic fields (10 MHz to 300 GHz) valuation de la conformit des appareils lectriques et lectroniques de faible puissance aux restrictions
18、de base concernant lexposition des personnes aux champs lectromagntiques (10 MHz 300 GHz) INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE R ICS 17.220.20; 35.020 PRICE CODE CODE PRIX ISBN 978-2-88910-989-0 Registered trademark of the International Electrotechnica
19、l Commission Marque dpose de la Commission Electrotechnique Internationale 2 62479 IEC:2010 CONTENTS FOREWORD.3 1 Scope.5 2 Normative references .5 3 Terms and definitions .5 4 Conformity assessment methods 8 4.1 General considerations8 4.2 Low-power exclusion level (P max ) 9 4.3 Exposure to multip
20、le transmitting sources .10 5 EMF assessment report10 5.1 General considerations10 5.2 Equipment-related information.10 6 Use of measurement uncertainty in the evaluation of compliance to limits 10 Annex A (informative) Derivation of low-power exclusion level from ICNIRP and IEEE exposure limits .12
21、 Annex B (informative) Derivation of alternative low-power exclusion levels for wireless devices used close to the body .14 Annex C (informative) Compliance requirement for a pulsed field.17 Annex D (informative) Topics from ISO/IEC 17025 relevant for EMF assessment reports18 Bibliography19 Figure 1
22、 Routes to show compliance with low-power exclusion level9 Table A.1 Example values of SAR-based P maxfor some cases described by ICNIRP, IEEE Std C95.1-1999 and IEEE Std C95.1-2005.13 Table B.1 Some typical frequency bands of portable wireless devices and corresponding low-power exclusion levels P
23、max predicted using Equations (B.1) through (B.9) 16 62479 IEC:2010 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ASSESMENT OF THE COMPLIANCE OF LOW-POWER ELECTRONIC AND ELECTRICAL EQUIPMENT WITH THE BASIC RESTRICTIONS RELATED TO HUMAN EXPOSURE TO ELECTROMAGNETIC FIELDS (10 MHz to 300 GHz) FOREWORD
24、1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electric
25、al and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technic
26、al committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non- governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organiz
27、ation for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical c
28、ommittee has representation from all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publication
29、s is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national a
30、nd regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment services
31、and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by independent certification bodies. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants
32、or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, u
33、se of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that
34、 some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 62479 has been prepared by IEC technical committee 106: Methods for the assessment of electric, magnetic and
35、electromagnetic fields associated with human exposure. The text of this standard is based on the following documents: FDIS Report on voting 106/198/FDIS 106/205/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. Thi
36、s publication has been drafted in accordance with the ISO/IEC Directives, Part 2. 4 62479 IEC:2010 The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the spe
37、cific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. 62479 IEC:2010 5 ASSESMENT OF THE COMPLIANCE OF LOW-POWER ELECTRONIC AND ELECTRICAL EQUIPMENT WITH THE BASIC RESTRICTIONS RELATED TO HUMAN EXPOSURE TO ELECTROMAGNETIC FIELDS (1
38、0 MHz to 300 GHz) 1 Scope This International Standard provides simple conformity assessment methods for low-power electronic and electrical equipment to an exposure limit relevant to electromagnetic fields (EMF). If such equipment cannot be shown to comply with the applicable EMF exposure requiremen
39、ts using the methods included in this standard for EMF assessment, then other standards, including IEC 62311 or other (EMF) product standards, may be used for conformity assessment. 2 Normative references The following referenced documents are indispensable for the application of this document. For
40、dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 62311, Assessment of electronic and electrical equipment related to human exposure restrictions for electromagnetic fields (0 Hz 300 GHz) 3
41、Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 available antenna power the maximum power, averaged over a time interval equal to the averaging time, supplied to the antenna feed line that can be theoretically delivered by a source having an im
42、pedance of positive real part to a directly connected load when the impedance of the load is widely varied NOTE 1 The available antenna power is obtained when the resistance of the load is equal to that of the source and its reactance is equal in magnitude but of opposite sign. However, other scenar
43、ios are possible e.g. if the PA monitors the current rather than the actual power, a changing antenna impedance (when DUT is operated close to the body) might actually cause a higher output power than the matched load. Then, a push-pull analysis with varied realistic loads (according to antenna impe
44、dance in the vicinity of the body) should be performed. NOTE 2 In some cases, conditions such as overheating or overvoltage prevent the available antenna power from being obtained. NOTE 3 Time average shall be taken during continuous or maximum duty cycle transmission at maximum power to the extent
45、possible for a given technology. NOTE 4 Adapted from IEC 60050-702:1992 11 1) , 702-07-10. NOTE 5 Antenna feed line is defined by IEC 60050-712:1992 12, 712-06-01. 1)Figures in square brackets refer to the Bibliography. 6 62479 IEC:2010 3.2 average total radiated power the time average of the total
46、radiated power over a time interval equal to the averaging time. This time average is taken during continuous or maximum duty cycle transmission at maximum power to the extent possible for a given technology NOTE If the user is in the reactive near field of the antenna, the presence of the user may
47、result in a change in the total radiated power due to a change in the antenna impedance. In this case, the average total radiated power must be the maximum possible power in the presence of the user. 3.3 averaging time t avgthe appropriate time over which exposure is averaged for purposes of determi
48、ning compliance with exposure limits 3.4 basic restriction restriction(s) on exposure to time-varying electric, magnetic, and electromagnetic fields that are based directly on established health effects NOTE Depending upon the frequency of the field, the physical quantities used to specify these res
49、trictions are current density, specific absorption rate (SAR), and power density. 3.5 conformity assessment demonstration that specified requirements relating to a product, process, system, person or body are fulfilled NOTE The subject field of conformity assessment includes activities such as testing, inspection and certification, as well as the accreditation of conformity assessment bodies. ISO 17000:200
