1、BRITISH STANDARD BS EN 50385:2002 Product standard to demonstrate the compliances of radio base stations and fixed terminal stations for wireless telecommunication systems with the basic restrictions or the reference levels related to human exposure to radio frequency electromagnetic fields (110 MHz
2、 40 GHz) General public The European Standard EN 50385:2002 has the status of a British Standard ICS 17.220.20; 33.070.01 BS EN 50385:2002 This British Standard, having been prepared under the direction of the Electrotechnical Sector Policy and Strategy Committee, was published under the authority o
3、f the Standards Policy and Strategy Committee on 6 September 2002 BSI 6 September 2002 ISBN 0 580 40345 9 National foreword This British Standard is the official English language version of EN 50385:2002. The UK participation in its preparation was entrusted to Technical Committee GEL/106, Human exp
4、osure to low frequency and high frequency electromagnetic radiation, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications refer
5、red to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provis
6、ions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation,
7、or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 8, an inside back cover and a back cover. T
8、he BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEAN STANDARD EN 50385 NORME EUROPENNE EUROPISCHE NORM August 2002 CENELEC European Committee for Electrotechnical Standardization Comit Europen
9、 de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2002 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 50385:2002 E ICS 17.220.20; 33.070
10、.01 English version Product standard to demonstrate the compliance of radio base stations and fixed terminal stations for wireless telecommunication systems with the basic restrictions or the reference levels related to human exposure to radio frequency electromagnetic fields (110 MHz - 40 GHz) Gene
11、ral public Norme produit pour la dmonstration de la conformit des stations de base radio et des stations terminales fixes pour les radiotlcommunications, aux restrictions de base et aux niveaux de rfrence relatifs lexposition de lhomme aux champs lectromagntiques (110 MHz - 40 GHz) Application au pu
12、blic en gnral Produktnorm zur Konformittsberprfung von Mobilfunk-Basisstationen und stationren Teilnehmergerten fr schnurlose Telekommunikationsanlagen im Hinblick auf die Basisgrenz- und Referenzwerte bezglich der Exposition von Personen gegenber elektromagnetischen Feldern (110 MHz bis 40 GHz) All
13、gemeinbevlkerung This European Standard was approved by CENELEC on 2002-07-02. 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-date lists and
14、 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 the respons
15、ibility 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, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Irela
16、nd, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom.EN 50385:2002 - 2 - Foreword This European Standard was prepared by the Technical Committee CENELEC TC 106X, Electromagnetic fields in the human environment. The text of the draft was
17、 submitted to the Unique Acceptance Procedure and was approved by CENELEC as EN 50385 on 2002-07-02. 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) 2003-07-01 - latest date
18、 by which the national standards conflicting with the EN have to be withdrawn (dow) 2005-07-01 _- 3 - EN 50385:2002 Contents Page 1 Scope. 4 2 Normative references 4 3 Definitions. 4 4 Conditions for calculation and measurement. 6 5 Limits . 6 6 Evaluation of results and determination of compliance
19、6 7 Documentation. 6 Annex A (informative) Declaration of conformity7 Annex B (informative) A-deviations 8EN 50385:2002 - 4 - 1 Scope This product standard applies to radio base stations and fixed terminal stations for wireless telecommunication systems as defined in Clause 3, operating in the frequ
20、ency range 110 MHz to 40 GHz. The object of this standard is to demonstrate the compliance of such product with the basic restrictions (directly or indirectly via compliance with reference levels) related to general public exposure to radio frequency electromagnetic fields. 2 Normative references Th
21、is European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publi
22、cations apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). EN 50383, Basic standard for the calculation and measurement of human exposure to electromagnetic fi
23、elds from radio base stations and fixed terminal stations for wireless telecommunication systems (110 MHz 40 GHz) Council Recommendation 1999/519/EC of 12 July 1999 on the limitation of exposure of the general public to electromagnetic fields (0 Hz to 300 GHz) (Official Journal L 197 of 30 July 1999
24、). 3 Definitions For the purposes of this European Standard, the following definitions apply. 3.1 basic restrictions restrictions on exposure to time-varying electric, magnetic, and electromagnetic fields that are based directly on established health effects. In the frequency range from 110 MHz to 1
25、0 GHz, the physical quantity used is the specific absorption rate. Between 10 GHz and 40 GHz, the physical quantity is the power density 3.2 base station in this product standard, the term “base station” (BS) covers radio base stations as well as fixed terminal stations intended for use in wireless
26、telecommunications networks. A base station comprises the hardware, including tranceivers, necessary to transmit and receive radio signals. Base stations with integrated antennas, base stations with connectors for external antennas and base stations intended for use with external antennas not suppli
27、ed by the same manufacturer are covered 3.3 compliance boundary a compliance boundary defines a volume outside which any point of investigation is deemed to be compliant 3.4 continuous exposure exposure for a duration exceeding the averaging time- 5 - EN 50385:2002 3.5 electric field strength (E) th
28、e magnitude of a field vector at a point that represents the force (F) on a positive small charge (q) divided by the charge. Electric field strength is expressed in units of volts per metre (V/m) 3.6 magnetic field strength (H) the magnitude of a field vector in a point that results in a force (F) o
29、n a charge q moving with the velocity v. The magnetic field strength is expressed in units of ampere per metre (A/m) 3.7 power density the radiant power incident perpendicular to a surface, divided by the area of the surface. The power density is expressed in units of watt per square metre (W/m 2 )
30、3.8 radio frequency (RF) for purposes of these safety considerations, the frequency range of interest is 110 MHz to 40 GHz 3.9 reference level reference levels are provided for the purpose of comparison with exposure quantities in air. Respect of the reference levels will ensure respect of the basic
31、 restriction. In the frequency range 110 MHz to 40 GHz the reference levels are expressed as electric field strength, magnetic field strength and power density values 3.10 specific absorption rate (SAR) the time derivative of the incremental energy (dW) absorbed by (dissipated in) an incremental mas
32、s (dm) contained in a volume element (dV) of given mass density ( ) SAR d dt dW dm d dt dW dV (1) SAR is expressed in units of watts per kilogram (W/kg). NOTE SAR can be calculated by: SAR E i 2 (2) SAR c i dT dt (t=0) (3)1) where E i : rms value of the electric field strength in the tissue in V/m :
33、 conductivity of body tissue in S/m : density of body tissue in kg/m 3 c i : heat capacity of body tissue in J/kg K dT dt : time derivative of temperature in body tissue in K/s 1 )This equation does not address thermal regulation in a live person.EN 50385:2002 - 6 - 4 Conditions for calculation and
34、measurement The assessment of compliance boundary shall be performed by calculation and/or measurement in accordance with EN 50383. The base station shall be operating in accordance with the manufacturers specification. Calculations and/or measurements on base stations intended for use with external
35、 antennas shall be performed for at least one typical system configuration consisting of a combination of the base station and an antenna system representative of the intended final use. 5 Limits The base station shall comply with the relevant limits for general public exposure specified as basic re
36、strictions or reference levels in the Council Recommendation 1999/519/EC (see Clause 2). 6 Evaluation of results and determination of compliance If the average power emitted by the base station is less than or equal to 20 mW then the base station is deemed to comply without testing. If the average p
37、ower emitted by the base station is more than 20 mW, then E, H or SAR calculations and/or measurements shall be performed according to Clause 4. The results of calculations and/or measurements shall be compared directly to the limits. The product is deemed to fulfil the requirements of this standard
38、 if the calculated and/or measured values are less than or equal to the limits. NOTE In the setting of basic restrictions and the derived reference levels, safety factors have been taken into account. In the specification of the assessment method, uncertainty has been constrained. This is the reason
39、 for not requiring that the measured values shall be compared to the limit reduced by the measurement uncertainty. 7 Documentation The legal entity responsible for putting the product on the market shall provide with the product the following information: 1) output power and antenna characteristics,
40、 if the product is equipped with integral antennas; 2) a detailed description of at least one typical normal configuration, including antenna system (feeders, connectors, combiners, antennas, etc.), if the product is intended to be used with external antennas; 3) compliance boundaries for general pu
41、blic exposure. If the product is intended for use with external antennas, compliance boundaries shall be given for the given typical system configurations; 4) information on how to determine exposure levels and compliance boundaries for any optional system configuration not specified in detail; 5) i
42、nformation on how to install the product or the external antennas in order to ensure that people are outside the compliance boundaries.- 7 - EN 50385:2002 Annex A (informative) Declaration of conformity This declaration can be used as a uniform way of giving information of compliance to interested p
43、arties. Information to whom it may concern DECLARATION OF CONFORMITY WITH EN 50385 Legal entity responsible for putting the product on the market hereby declares that the product described below is in full compliance with the requirements of the standard EN 50385 Other relevant information: Date Sig
44、nature Name PositionEN 50385:2002 - 8 - Annex B (informative) A-deviations A-deviation: National deviation due to regulations, the alteration of which is for the time being outside the competence of the CEN/CENELEC member. This European Standard falls under Directive 1999/5/EC. NOTE (from CEN/CENELE
45、C IR Part 2, 2.17): Where standards fall under EC Directives, it is the view of the Commission of the European Communities (OJ No C 59; 1982-03-09) that the effect of the decision of the Court of Justice in case 815/79 Cremonini/Vrankovich (European Court Reports 1980, p. 3583) is that compliance wi
46、th A-deviations is no longer mandatory and that the free movement of products complying with such a standard should not be restricted except under the safeguard procedure provided for in the relevant Directive. A-deviations in an EFTA-country are valid instead of the relevant provisions of the Europ
47、ean Standard in that country until they have been removed. Clause Deviation General Switzerland Ordinance relating to Protection from Non-Ionising Radiation, SR 814.710 of 23 December 1999 (as of February 2000) This product standard must not be applied to installations which are covered by the Ordin
48、ance relating to Protection from Non-Ionising Radiation, i.e. stationary transmission installations for mobile telecommunication systems and wireless local loops, as well as transmission installations for broadcasting and other wireless applications. For most of these installations more stringent li
49、mits (so called installation limit values) apply than those which underlie this product standard.blankBS EN 50385:2002 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British
