IEC 62479-2010 Assessment of the compliance of low power electronic and electrical apparatus with the basic restrictions related to human exposure to electromag.pdf

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

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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