01246272 PDF BRITISH STANDARD BS EN 60704 2 7 1998 Household and similar electrical appliances — Test code for the determination of airborne acoustical noise — Part 2 Particular requirements for fans[.]
BRITISH STANDARD Household and similar electrical appliances — Test code for the determination of airborne acoustical noise — Part 2: Particular requirements for fans The European Standard EN 60704-2-7:1998 has the status of a British Standard ICS 17.140.20; 23.120 BS EN 60704-2-7:1998 BS EN 60704-2-7:1998 National foreword This British Standard is the English language version of EN 60704-2-7:1998 It is identical with IEC 60704-2-7:1997 The UK participation in its preparation was entrusted to Technical Committee CPL/59, Performance of household electrical appliances, which has the responsibility to: — aid enquirers to understand the text; — present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; — monitor related international and European developments and promulgate them in the UK A list of organizations represented on this committee can be obtained on request to its secretary From January 1997, all IEC publications have the number 60000 added to the old number For instance, IEC 27-1 has been renumbered as IEC 60027-1 For a period of time during the change over from one numbering system to the other, publications may contain identifiers from both systems Cross-references Attention is drawn to the fact that CEN and CENELEC Standards normally include an annex which lists normative references to international publications with their corresponding European publications The British Standards which implement these international or European publications may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue A British Standard does not purport to include all the necessary provisions of a contract Users of British Standards are responsible for their correct application Compliance with a British Standard does not of itself confer immunity from legal obligations Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages to and a back cover This standard has been updated (see copyright date) and may have had amendments incorporated This will be indicated in the amendment table on the inside front cover This British Standard, having been prepared under the direction of the Electrotechnical Sector Board, was published under the authority of the Standards Board and comes into effect on 15 April 1998 © BSI 03-1999 ISBN 580 28878 Amendments issued since publication Amd No Date Comments BS EN 60704-2-7:1998 Contents National foreword Foreword Text of EN 60704-2-7 © BSI 03-1999 Page Inside front cover i ii blank EUROPEAN STANDARD EN 60704-2-7 NORME EUROPÉENNE February 1998 EUROPÄISCHE NORM ICS 17.140.20; 23.120 English version Household and similar electrical appliances Test code for the determination of airborne acoustical noise Part 2: Particular requirements for fans (IEC 60704-2-7:1997) Appareils électrodomestiques et analogues Code d’essai pour la détermination du bruit aérien Partie 2: Règles particulières pour les ventilateurs (CEI 60704-2-7:1997) Elektrische Geräte für den Hausgebrauch und ähnliche Zwecke Prüfvorschrift für die Bestimmung der Luftschallemission Teil 2: Besondere Bestimmungen für Lüfter (IEC 60704-2-7:1997) This European Standard was approved by CENELEC on 1998-01-01 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-date 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 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, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels © 1998 CENELEC — All rights of exploitation in any form and by any means reserved worldwide for CENELEC members Ref No EN 60704-2-7:1998 E EN 60704-2-7:1998 Foreword Contents The text of document 59/179/FDIS, future edition of IEC 60704-2-7, prepared by IEC TC 59, Performance of household electrical appliances, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60704-2-7 on 1998-01-01 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) 1998-10-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 1998-10-01 This part of EN 60704 is to be used in conjunction with EN 60704-1:1997, Household and similar electrical appliances — Test code for the determination of airborne acoustical noise — Part 1: General requirements This part supplements or modifies the corresponding clauses in EN 60704-1 Where a particular clause or subclause of part is not mentioned in this part 2, that clause or subclause applies as far as is reasonable Where this part states “addition”, “modification” or “replacement”, the relevant text of part is to be adapted accordingly Subclauses and figures which are additional to those in part are numbered starting from from 101 Annexes designated “normative” are part of the body of the standard Annexes designated “informative” are given for information only In this standard, Annex B and Annex ZA are normative and Annex A is informative Annex ZA has been added by CENELEC Introduction Scope and object Normative references Terms and definitions Measurement methods and acoustical environments Instrumentation Operation and location of appliances under test Measurement of sound pressure levels Calculation of sound pressure and sound power levels Information to be recorded 10 Information to be reported Annex A (informative) Guidelines for the design of simple test rooms with essentially free-field conditions Annex B (normative) Standard test table Annex ZA (normative) Normative references to international publications with their corresponding European publications Figure 101 — Measurement surface — hemisphere — with 10 microphone positions for partition (wall and window) fans and for wall-mounted table fans Page 3 3 4 4 5 7 Endorsement notice The text of the International Standard IEC 60704-2-7:1997 was approved by CENELEC as a European Standard without any modification © BSI 03-1999 EN 60704-2-7:1998 Introduction The measuring conditions specified in this Part provide for sufficient accuracy in determining the noise emitted, and the comparison of the results of measurements taken by different laboratories, whilst simulating as far as possible the practical use of household fans It is recommended to consider the determination of noise levels as part of a comprehensive testing procedure covering many aspects of the properties and performance of household fans NOTE As stated in the introduction to IEC 60704-1, this test code is concerned with airborne noise only Scope and object NOTE For determining and verifying noise emission values declared in product specifications, see IEC 60704-3 Normative references This clause of Part is applicable except as follows: Addition: IEC 60665:1980, A.C electric ventilating fans and regulators for household and similar purposes IEC 60704-1:1997, Household and similar electrical appliances — Test code for the determination of airborne acoustical noise — Part 1: General requirements1) IEC 60879:1986, Performance and construction of electric circulating fans and regulators This clause of Part is applicable except as follows: Terms and definitions 1.1 Scope This clause of Part is applicable except as follows: Addition: Replacement: This standard applies to electrical fans (including their accessories and their component parts) for household and similar use, designed for a.c or d.c supply Motor, impeller and their housing, if any, form a single unit These particular requirements apply to — table fans, — pedestal fans, — ceiling fans, — partition fans This standard does not apply to — fans which are part of a ventilation system, — fans designed exclusively for industrial purposes, — fans which are part of an appliance (for example cooling fans), — fans with additional functions (for example heating, humidifying) Limitations for the use of this test code are given in the scope of IEC 60704-1 1.2 Object Addition: This standard describes the determination of the noise emission of household fans in normal operation at maximum speed Other speeds can be used in addition Requirements for the declaration of noise emission values are not within the scope of this standard The aim of this standard is to measure the noise in a room resulting from the operation of the fan 1) 3.101 table fan a smaller diameter propeller-bladed fan having two or more blades, intended for use with free inlet and outlet of air It may be a table fan or bracket-mounted fan for wall or ceiling mounting [IEC 60879] NOTE Adjustment of height, position and oscillation may be possible 3.102 pedestal fan a propeller type fan having two or more blades mounted on a pedestal of fixed or variable height and intended for use with free inlet and outlet of air [IEC 60879] NOTE Adjustment of position and oscillation may be possible 3.103 ceiling fan a propeller-bladed fan having two or more blades, and provided with a device for suspension from the ceiling of a room so that the blades rotate in a horizontal plane [IEC 60879] 3.104 partition (wall and window) fans fans designed for installation in wall or window openings The air is displaced from one room to another or to atmosphere, or vice versa (see also IEC 60665) To be published © BSI 03-1999 EN 60704-2-7:1998 Measurement methods and acoustical environments 6.5 Location and mounting of appliances This clause of Part is applicable except as follows: Addition: Ceiling fans may be from a special support instead of the ceiling In this case, care shall be taken to ensure that the means of suspension or clamping not change the sound output of the appliance In order not to restrict the airflow, the distance between the lowest edge of the appliance and the reflecting plane (usually the floor), shall be at least 1,5 m Alternatively, ceiling fans can be mounted in the reverse working position on the reflecting plane, providing this does not affect sound radiation 6.5.2 and 6.5.3 Not applicable 4.2 Direct method Addition: NOTE If pure tone components are present in the noise emitted, proper precautions should be taken as specified in ISO 3743-1, ISO 3743-2 and ISO 3744 4.3 Comparison method Modification: The comparison method described in ISO 3743-1 is not applicable NOTE Measurement according to ISO 3743-1 is under consideration NOTE If pure components are present in the noise emitted, proper precautions should be taken as specified in ISO 3743-1, ISO 3743-2 and ISO 3744 Instrumentation This clause of Part is applicable except as follows: Addition: The use of a windscreen is mandatory, and necessary corrections for changes in the microphone sensitivity shall be added to the observed sound pressure levels Operation and location of appliances under test This clause of Part is applicable except as follows: 6.2 Supply of electricity and of water or gas 6.2.3 and 6.2.4 Not applicable 6.4 Loading and operating of appliances during tests 6.4.1 Replacement: Load and operation should simulate normal use Fans which can be tilted during normal use shall be located in the position with the highest noise level emitted, and the duration of the measurement shall be at least 10 s Fans which can oscillate automatically will operate when oscillating In the case of oscillating appliances, the A-weighted sound pressure level shall be averaged on at least one complete cycle 6.4.3 Not applicable 6.5.1 6.5.4 Replacement: Partition (wall and window) fans shall be mounted in an opening made: — either in a wall of the special reverberation test room; — or on the second reflecting plane of the free field over a reflecting plane environment The height between the centre of the appliance and the floor shall be 1,5 m ± 0,05 m In all cases, care shall be taken to follow the instructions given by the manufacturer and to avoid any structure-borne noise Care shall be taken to avoid any restriction of the airflow Attention shall be paid to avoid any difference of pressure between the rooms concerned (or atmosphere), in order to avoid unwanted load on the fan 6.5.5 Not applicable 6.5.7 Not applicable Measurement of sound pressure levels This clause of Part is applicable except as follows: Addition: The use of a windscreen is mandatory © BSI 03-1999 EN 60704-2-7:1998 7.1 Microphone array, measurement surface and RSS location for essentially free-field conditions over reflecting plane(s) 7.1.1 Addition: This measurement surface shall be used for table, pedestal and ceiling fans Table fans are placed on the floor This measurement surface shall not be used for wall fans and window fans 7.1.2 and 7.1.3 Not applicable 7.1.4 Replacement: For partition (wall and window) fans and wall-mounted table fans, the measurement surface is a hemisphere, with 10 microphone positions as specified in Figure 101, centred in the projection of the geometrical centre of the reference box on the vertical plane, the co-ordinate system describing the microphone positions being located with the x and y axis in the vertical reflecting plan and the z axis horizontal perpendicular to it The x axis lies in the horizontal central plane of the reference box The front of the fan is directed towards the z axis The area of this measurement surface is S = 2;R2 The radius of the hemisphere is m © BSI 03-1999 7.1.5 Not applicable 7.1.6 Addition: This measurement surface shall be used for tall pedestal fans 7.2 Not applicable 7.4 Measurements 7.4.4 Not applicable Calculation of sound pressure and sound power levels This clause of Part is applicable Information to be recorded This clause of Part is applicable except as follows: 9.7 Electric supply, water supply etc 9.7.3 and 9.7.4 Not applicable 10 Information to be reported This clause of Part is applicable, except as follows: 10.3 Test conditions for the appliance 10.3.4 and 10.3.5 Not applicable EN 60704-2-7:1998 Figure 101 — Measurement surface — hemisphere — with 10 microphone positions for partition (wall and window) fans and for wall-mounted table fans © BSI 03-1999 EN 60704-2-7:1998 Annex A (informative) Guidelines for the design of simple test rooms with essentially free-field conditions This annex of Part is applicable Annex B (normative) Standard test table This annex of Part is applicable © BSI 03-1999 EN 60704-2-7:1998 Annex ZA (normative) Normative references to international publications with their corresponding European publications This 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 publications 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) NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies Addition: Publication Year Title EN/HD Year IEC 60665 1980 A.C electric ventilating fans and regulators for household and similar purposes — — IEC 60704-1 1997 Household and similar electrical appliances — Test code for the determination of airborne acoustical noise Part 1: General requirements EN 60704-1 1997 IEC 60879 1986 Performance and construction of electric circulating fans and regulators — — © BSI 03-1999 blank BS EN 60704-2-7:1998 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 Standards are updated by amendment or revision Users of British Standards should make sure that they 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