SANS 62311-2008 Assessment of electronic and electrical equipment related to human exposure restrictions for electromagnetic fields (0 Hz - 300 GHz)《与电磁场人体暴露限制相关的电子及电气设备评估(0赫-300千兆.pdf

1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA

2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any

3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-21051-9 SANS 62311:2008 Edition 1 IEC 62311:2007 Edition 1SOUTH AFRICAN NATIONAL STANDARD Assessment of electronic and electrical equipmen

4、t related to human exposure restrictions for electromagnetic fields (0 Hz 300 GHz) This national standard is the identical implementation of IEC 62311:2007 and is adopted with the permission of the International Electrotechnical Commission. Published by Standards South Africa 1 dr lategan road groen

5、kloof private bag x191 pretoria 0001 tel: 012 428 7911 fax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards South Africa This standard may only be used and printed by approved subscription and freemailing clients of the SABS.SANS 62311:2008 Edition 1 IEC 62311:2007 Edition 1 Table

6、 of changes Change No. Date Scope National foreword This South African standard was approved by National Committee StanSA TC 73, Electromagnetic compatibility, in accordance with procedures of Standards South Africa, in compliance with annex 3 of the WTO/TBT agreement. This SANS document was publish

7、ed in February 2008. This standard may only be used and printed by approved subscription and freemailing clients of the SABS. IEC 62311 Edition 1.0 2007-08 INTERNATIONAL STANDARD NORME INTERNATIONALE Assessment of electronic and electrical equipment related to human exposure restrictions for electro

8、magnetic fields (0 Hz 300 GHz) Evaluation des quipements lectroniques et lectriques en relation avec les restrictions dexposition humaine aux champs lectromagntiques (0 Hz 300 GHz) INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE XB ICS 97.030 PRICE CODE CODE PRIX

9、 ISBN 2-8318-9269-4 SANS 62311:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS. 2 62311 IEC:2007 CONTENTS FOREWORD.4 1 Scope and object6 2 Normative references .6 3 Terms and definitions .6 4 Compliance criteria.10 5 Assessment methods .10

10、6 Evaluation of compliance to limits.11 7 Applicability of compliance assessment methods12 7.1 General .12 7.2 Generic procedure for assessment of equipment.14 8 Sources with multiple frequencies 17 8.1 Introduction .17 8.2 Frequency range from 1 Hz 10 MHz (ICNIRP-based)17 8.2.1 Frequency domain ass

11、essment17 8.2.2 Time domain assessment 19 8.3 Frequency range from 100 kHz 300 GHz (ICNIRP-based) 21 8.4 Frequency range from 0 kHz 5 MHz (IEEE-based)22 8.4.1 Frequency domain assessment22 8.4.2 Time domain assessment 22 8.5 Frequency range from 3 kHz 300 GHz (IEEE-based) 23 9 Assessment report23 9.

12、1 General .23 9.2 Items to be recorded in the assessment report 24 9.2.1 Assessment method 24 9.2.2 Presentation of the results.24 9.2.3 Equipment using external antennas .24 10 Information to be supplied with the equipment24 Annex A (informative) Field calculation 25 Annex B (informative) SAR compl

13、iance assessment .30 Annex C (informative) Information for numerical modelling.32 Annex D (informative) Measurements of physical properties and body currents .61 Annex E (informative) Specific absorption rate (SAR) .65 Annex F (informative) Measurement of E and H field67 Annex G (informative) Source

14、 modelling .70 Bibliography73 Figure 1 Assessment flowchart 16 Figure 2 Schematic of “weighting circuit”19 Figure 3 Dependency on frequency of the reference levels V plotted with smoothing edges .19 Figure 4 Transfer function A.20 SANS 62311:2008This standard may only be used and printed by approved

15、 subscription and freemailing clients of the SABS.62311 IEC:2007 3 Figure A.1 Geometry of antenna with largest linear dimension D25 Figure A.2 Current element Idlsin( t) at the origin of spherical coordinate system 26 Figure A.3 Ratio of E 2 , H 2 , and E H field components .27 Figure A.4 Ratio of E

16、 H field components for three typical antennas28 Figure A.5 Far-field = straight line, radiated near-field = lower line any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non- governmental organizations liaising w

17、ith the IEC also participate in this preparation. IEC collaborates closely with the International Organization 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

18、nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee 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

19、that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications 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 Commit

20、tees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC provides no marking pr

21、ocedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publication. 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 or a

22、gents 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, use o

23、f, 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 som

24、e 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 62311 has been prepared by IEC technical committee 106: Methods for the assessment of electric, magnetic and elec

25、tromagnetic fields associated with human exposure. The text of this standard is based on the following documents: FDIS Report on voting 106/129/FDIS 106/134/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. This pu

26、blication has been drafted in accordance with the ISO/IEC Directives, Part 2. SANS 62311:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.62311 IEC:2007 5 The committee has decided that the contents of this publication will remain unchanged

27、until the maintenance result date 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. SANS 62311:2008This standard may only be used and pr

28、inted by approved subscription and freemailing clients of the SABS. 6 62311 IEC:2007 ASSESSMENT OF ELECTRONIC AND ELECTRICAL EQUIPMENT RELATED TO HUMAN EXPOSURE RESTRICTIONS FOR ELECTROMAGNETIC FIELDS (0 Hz 300 GHz) 1 Scope and object This International Standard applies to electronic and electrical

29、equipment for which no dedicated product- or product family standard regarding human exposure to electromagnetic fields applies. The frequency range covered is 0 Hz to 300 GHz. The object of this generic standard is to provide assessment methods and criteria to evaluate such equipment against basic

30、restrictions or reference levels on exposure of the general public related to electric, magnetic and electromagnetic fields and induced and contact current. NOTE This standard is intended to cover both intentional and non-intentional radiators. If the equipment complies with the requirements in anot

31、her relevant standard, e.g. EN 50371 covering low power equipment, then the requirements of this standard (IEC 62311) are considered to be met and the application of this standard to that equipment is not necessary. See also Clause 7.2. 2 Normative references The following referenced documents are i

32、ndispensable 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. IEC 60050-161, International Electrotechnical Vocabulary Chapter 161: Electromagnetic com

33、patibility 3 Terms and definitions For the purposes of this document, the terms and definitions contained in IEC 60050-161 as well as the following terms and definitions apply. 3.1 averaging time t avgappropriate time over which exposure is averaged for purposes of determining compliance 3.2 basic r

34、estriction maximum exposure level that should not be exceeded under any conditions NOTE Examples of basic restrictions can be found in Annex II of the Council Recommendation 1999/519/EC 6 1) , ICNIRP Guidelines 1 IEEE Std C95.6 2 and IEEE Std C95.1 3. 1) Figures in square brackets refer to the Bibli

35、ography. SANS 62311:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.62311 IEC:2007 7 3.3 contact current current flowing into the body resulting from contact with a conductive object in an electromagnetic field. This is the localised curren

36、t flow into the body (usually the hand, for a light brushing contact) 3.4 current density J current per unit cross-sectional area flowing inside the human body as a result of exposure to electromagnetic fields 3.5 duty factor duty cycle ratio of pulse duration to the pulse period of a periodic pulse

37、 train. Also, a measure of the temporal transmission characteristic of an intermittently transmitting RF source such as a paging antenna by dividing average transmission duration by the average period for transmissions. A duty factor of 1,0 corresponds to continuous operation 3.6 electric field stre

38、ngth E magnitude of a field vector at a point that represents the force (F) on an infinitely small charge (q) divided by the charge q F E = 3.7 equipment under test EUT an electrical or electronic apparatus that is tested for compliance with exposure limits 3.8 exposure exposure occurs whenever and

39、wherever a person is subjected to electric, magnetic or electromagnetic fields or to contact current other than those originating from physiological processes in the body and other natural phenomena 3.9 exposure level value of the quantity used to assess exposure NOTE This may be an induced current

40、density, SAR, power density, electric or magnetic field strength, a limb current or a contact current. 3.10 exposure limit value of an electric, magnetic or electromagnetic field derived from the basic restrictions using worst-case assumption about exposure. If the exposure limit is not exceeded, then the basic restrictions will never be exceeded 3.11 exposure, direct effect of result of a direct interaction in the exposed human body from exposure to electromagnetic fields SANS 62311:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.