BS EN 62479-2010 Assessment of the compliance of low power electronic and electrical equipment with the basic restrictions related to human exposure to electromagnetic fields (10 M.pdf

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1、BS EN 62479:2010Assessment of the complianceof low power electronicand electrical equipmentwith the basic restrictionsrelated to human exposure toelectromagnetic fields (10 MHzto 300 GHz)BS EN 62479:2010 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 62479:2010

2、. which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee GEL/106, Human exposure to low frequency and highfrequency electromagnetic radiation.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does

3、 not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2010ISBN 978 0 580 57081 0ICS 13.280; 17.220.20; 33.070.01; 35.020Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was publish

4、ed under the authority of theStandards Policy and Strategy Committee on 3 2010.Amendments issued since publicationDate Text affectedThe CENELEC common modifications have been implemented at the appropriate places in the text. The start and finish of each commonmodification is indicated in the text b

5、y tags . 1 DecemberIt is derived from IEC 62479:2010. It supersedes BS EN 50371:2002 EUROPEAN STANDARD EN 62479 NORME EUROPENNE EUROPISCHE NORM September 2010 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektr

6、otechnische Normung Management Centre: Avenue Marnix 17, B - 1000 Brussels 2010 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 62479:2010 E ICS 17.220.20; 35.020 Supersedes EN 50371:2002English version Assessment of the complianc

7、e of low power electronic and electrical equipment with the basic restrictions related to human exposure to electromagnetic fields (10 MHz to 300 GHz) (IEC 62479:2010, modified) Evaluation de la conformit des appareils lectriques et lectroniques de faible puissance aux restrictions de base concernan

8、t lexposition des personnes aux champs lectromagntiques (10 MHz 300 GHz) (CEI 62479:2010, modifie) Beurteilung der bereinstimmung von elektronischen und elektrischen Gerten kleiner Leistung mit den Basisgrenzwerten fr die Sicherheit von Personen in elektromagnetischen Feldern (10 MHz bis 300 GHz) (I

9、EC 62479:2010, modifiziert) This European Standard was approved by CENELEC on 2010-09-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-dat

10、e lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under

11、the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finlan

12、d, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Foreword The text of document 106/198/FDIS, future edition 1 of IEC 62479, pr

13、epared by IEC TC 106, Methods for the assessment of electric, magnetic and electromagnetic fields associated with human exposure, was submitted to the IEC-CENELEC parallel vote. A draft amendment to the European Standard was prepared by the Technical Committee CENELEC TC 106X, Electromagnetic fields

14、 in the human environment. It was submitted to the Unique Acceptance Procedure. The combined texts were approved by CENELEC as EN 62479 on 2010-09-01. This European Standard supersedes EN 50371:2002. Attention is drawn to the possibility that some of the elements of this document may be the subject

15、of patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent rights. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2011-09-01 lates

16、t date by which the national standards conflicting with the EN have to be withdrawn (dow) 2013-09-01 Annex ZA has been added by CENELEC. _ BS EN 62479:2010EN 62479:2010 (E) 2 Endorsement notice The text of the International Standard IEC 62479:2010 was approved by CENELEC as a European Standard with

17、agreed common modifications. BS EN 62479:2010EN 62479:2010 (E) 3 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following referenced documents are indispensable for the application of this document. For dated references, onl

18、y the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year I

19、EC 62311 (mod) - Assessment of electronic and electrical equipment related to human exposure restrictions for electromagnetic fields (0 Hz - 300 GHz) EN 62311 - This page deliberately left blankCONTENTS FOREWORD.2 1 Scope.6 2 Normative references .6 3 Terms and definitions .6 4 Conformity assessment

20、 methods 9 4.1 General considerations9 4.2 Low-power exclusion level (Pmax) 10 4.3 Exposure to multiple transmitting sources .11 5 EMF assessment report11 5.1 General considerations11 5.2 Equipment-related information.11 6 Use of measurement uncertainty in the evaluation of compliance to limits 11 A

21、nnex A (informative) Derivation of low-power exclusion level from ICNIRP and IEEE exposure limits .13 Annex B (informative) Derivation of alternative low-power exclusion levels for wireless devices used close to the body .15 Annex C (informative) Compliance requirement for a pulsed field.18 Annex D

22、(informative) Topics from ISO/IEC 17025 relevant for EMF assessment reports19 Bibliography20 Figure 1 Routes to show compliance with low-power exclusion level10 Table A.1 Example values of SAR-based Pmaxfor some cases described by ICNIRP, IEEE Std C95.1-1999 and IEEE Std C95.1-2005.14 Table B.1 Some

23、 typical frequency bands of portable wireless devices and corresponding low-power exclusion levels Pmax predicted using Equations (B.1) through (B.9) 17 BS EN 62479:2010EN 62479:2010 (E) 5 ASSESMENT OF THE COMPLIANCE OF LOW-POWER ELECTRONIC AND ELECTRICAL EQUIPMENT WITH THE BASIC RESTRICTIONS RELATE

24、D TO HUMAN EXPOSURE TO ELECTROMAGNETIC FIELDS (10 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 co

25、mply with the applicable EMF exposure requirements 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 indispen

26、sable 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 62311, Assessment of electronic and electrical equipment related to human exposure restricti

27、ons for electromagnetic fields (0 Hz 300 GHz) 3 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

28、theoretically delivered by a source having an impedance 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 magni

29、tude but of opposite sign. However, other scenarios 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 v

30、aried realistic loads (according to antenna impedance 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 cy

31、cle transmission at maximum power to the extent possible for a given technology. NOTE 4 Adapted from IEC 60050-702:1992 111), 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. Council Recommendation 1999/519/EC

32、 of 12 July 1999 on the limitation of exposure of the general public to electromagnetic fields (0 Hz to 300 GHz), Official Journal L 199 of 30 July 1999. BS EN 62479:2010EN 62479:2010 (E) 6 3.2 average total radiated power the time average of the total radiated power over a time interval equal to th

33、e 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 result in a change in the total radiated power

34、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 tavgthe appropriate time over which exposure is averaged for purposes of determining compliance with exposure limits 3.4 basic r

35、estriction restriction(s) on exposure to time-varying electric, magnetic, and electromagnetic fields that are based directly on established health effects NOTE 1 Depending upon the frequency of the field, the physical quantities used to specify these restrictions are current density, specific absorp

36、tion 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 t

37、he accreditation of conformity assessment bodies. ISO 17000:2004 14, definition 2.1, modified 3.6 information technology equipment ITE any equipment which has a primary function of either (or a combination of) entry, storage, display, retrieval, transmission, processing, switching, or control, of da

38、ta and of telecommunication messages and which may be equipped with one or more terminal ports typically operated for information transfer EXAMPLE Types of ITE include data processing equipment, office machines, electronic business equipment and telecommunication equipment. 3.7 low-power equipment e

39、quipment where the available antenna power and/or the average total radiated power is less than or equal to the low-power exclusion level 3.8 low-power exclusion level Pmaxspecified condition on device output power, which may also depend on other variables such as frequency and distance of radiating

40、 source from persons, such that the exposure level produced by the source will not exceed a specific basic restriction. If the device output power is less than Pmax, then the device is deemed to comply with the basic restrictions NOTE 2 Basic restrictions can be found in Annex II (Table 1) of the Co

41、uncil Recommendation 1999/519/EC. BS EN 62479:2010EN 62479:2010 (E) 7 3.9 multimedia equipment MME equipment that has the function of information technology equipment (ITE), audio, video or broadcast-receiving equipment, interaction and/or communication with the user of the product or combinations o

42、f these functions CISPR 32_2)9, definition 3.1.17 3.10 peak radiated power the maximum instantaneous radiated power 3.11 power density the power passing through an element of surface normal to the direction of propagation of energy of an electromagnetic wave divided by the area of the element IEC 60

43、050-705:1995 13, 705-02-03, power flux density NOTE Power density is expressed in watts per square meter. 3.12 pulse repetition frequency PRF the number of pulses transmitted per unit time 3.13 specific absorption SA energy absorbed by (dissipated in) an incremental mass contained in a volume elemen

44、t of biological tissue when exposure to a radio frequency electromagnetic field occurs NOTE Specific absorption is expressed in joules per kilogram. 3.14 specific absorption rate SAR power absorbed by (dissipated in) an incremental mass contained in a volume element of biological tissue when exposur

45、e to a radio frequency electromagnetic field occurs NOTE SAR is expressed in watts per kilogram. 3.15 total radiated power the total power emitted by the equipment in the form of electromagnetic fields in the absence of any nearby objects (e.g. a human body) NOTE For transmitters that use antennas,

46、the total radiated power is independent of antenna gain. 3.16 unintentional radiator non-intentional radiator electrical or electronic equipment that radiates radio frequency (RF) energy, even though the emission is not a deliberate or necessary part of its function EXAMPLE Examples of unintentional

47、 radiators include all types of ITE without antenna and/or wireless radio transmission function. 2)In preparation. BS EN 62479:2010EN 62479:2010 (E) 8 4 Conformity assessment methods 4.1 General considerations Compliance of electromagnetic emissions from electronic and electrical equipment with the

48、basic restrictions usually is determined by measurements and, in some cases, calculation of the exposure level. If the electrical power used by or radiated by the equipment is sufficiently low, the electromagnetic fields emitted will be incapable of producing exposures that exceed the basic restrict

49、ions. This standard provides simple EMF assessment procedures for this low power equipment. Any relevant compliance assessment procedure which is consistent with the state of the art, reproducible and gives valid results can be used. For transmitters intended for use with more than one antenna configuration option, the combination of transmitter and antenna(s) which generates the highest available antenna power and/or average total radiated power shall be assessed. Four routes, as illust