01653998 PDF BRITISH STANDARD BS EN 60704 2 11 1999 IEC 60704 2 11 1998 Household and similar electrical appliances — Test code for the determination of airborne acoustical noise — Part 2 11 Particula[.]
BRITISH STANDARD Household and similar electrical appliances — Test code for the determination of airborne acoustical noise — Part 2-11: Particular requirements for electrically operated food preparation appliances The European Standard EN 60704-2-11:1999 has the status of a British Standard ICS 17.140.20; 97.040.50 BS EN 60704-2-11:1999 IEC 60704-2-11:1998 BS EN 60704-2-11:1999 National foreword This British Standard is the English language version of EN 60704-2-11:1999 It is identical with IEC 60704-2-11:1998 The UK participation in its preparation was entrusted by Technical Committee CPL/59, Performance of household electrical appliances, to Subcommittee CPL/59/7, Small kitchen 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 subcommittee 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 6, an inside back cover 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 Committee, was published under the authority of the Standards Committee and comes into effect on 15 April 1999 © BSI 02-2000 ISBN 580 32256 Amendments issued since publication Amd No Date Comments BS EN 60704-2-11:1999 Contents National foreword Foreword Text of EN 60704-2-11 © BSI 02-2000 Page Inside front cover i ii blank EUROPEAN STANDARD EN 60704-2-11 NORME EUROPÉENNE January 1999 EUROPÄISCHE NORM ICS 70.140.20; 97.040.50 English version Household and similar electrical appliances Test code for the determination of airborne acoustical noise Part 2-11: Particular requirements for electrically operated food preparation appliances (IEC 60704-2-11:1998) Appareils électrodomestiques et analogues — Code d’essai pour la détermination du bruit aérien Partie 2-11: Règles particulières pour les appareils électriques destinés la préparation de la nourriture (CEI 60704-2-11:1998) Prüfvorschrift für die Bestimmung der Luftschallemission von elektrischen Geräten für den Hausgebrauch und ähnliche Zwecke Teil 2-11: Besondere Anforderungen für elektrisch betriebene Speisezubereitungsgeräte (IEC 60704-2-11:1998) This European Standard was approved by CENELEC on 1999-01-01 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 © 1999 CENELEC — All rights of exploitation in any form and by any means reserved worldwide for CENELEC members Ref No EN 60704-2-11:1999 E EN 60704-2-11:1999 Foreword Contents The text of document 59G/86/FDIS, future edition of IEC 60704-2-11, prepared by SC 59G, Small kitchen appliances, of IEC TC 59, Performance of household electrical appliances, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60704-2-11 on 1999-01-01 The following dates were fixed: Page Foreword Introduction Scope and object Normative references 3 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 ZA (normative) Normative references to international publications with their corresponding European publications Inside back cover Figure 101 — Examples of test fixtures for hand-held appliances Figure 102 — Example of load for citrus juice extraction function — latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement — latest date by which the national standards conflicting with the EN have to be withdrawn (dop) 1999-10-01 (dow) 2001-10-01 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 of 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 101 Annexes which are additional to those in part are lettered AA, BB, etc Annexes designated “normative” are part of the body of the standard In this standard, Annex ZA is normative Annex ZA has been added by CENELEC Endorsement notice The text of the International Standard IEC 60704-2-11:1998 was approved by CENELEC as a European Standard without any modification © BSI 02-2000 EN 60704-2-11:1999 Introduction Terms and definitions The measuring conditions specified in this Part 2-11 simulate, as far as possible, the practical use of electrically-operated food preparation appliances Most tests are carried out without load, to avoid the unsteadiness of the noise and to ensure a good repeatability and a good reproducibility It is recommended to consider noise data as part of performance data This clause of Part is applicable except as follows: Addition: NOTE As stated in the introduction to IEC 60704-1, this test code is concerned with airborne noise only 3.102 standard test loads for noise measurement Scope and object for the function defined in clause 12 of IEC 60619 (blending/pureeing), the standard test load is water at the ambient temperature t = 20 °C ± °C, filling the standard container with a depth of 150 mm ± mm for the function defined in clause 19 of IEC 60619 (citrus juice extraction), the standard test load is a +5 force of 30 –0 N exerted on the cone without, if possible, any perturbation of the rotating speed of the appliance and of the acoustical field This clause of Part is applicable except as follows: 1.1 Scope Replacement: This standard applies to electrically-operated food preparation appliances, either in the form of separate machines with a single function or in the form of multi-purpose machines with appropriate tools or attachments for several functions These machines are intended for placing on counters, tables, work tops or sinks, for wall-mounting, for building-in, or for hand-held use, supplied from mains or from batteries and able to ensure the functions described in clause of IEC 60619 Limitations for the use of this test code are given in the scope of IEC 60704-1 1.2 Object Addition: The object of this test code is to describe the procedure for the measurement of noise emitted by electrically-operated food preparation appliances For the function defined in clause 20 of IEC 60619 (coffee milling and grinding), this test code is only applicable for comparative tests Requirements for the declaration of noise emission values are not within the scope of this standard 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: Not applicable: ISO 3743-1:1994, Acoustics — Determination of sound power levels of noise sources — Engineering methods for small, movable sources in reverberant fields — Part 1: Comparison method for hard-walled test rooms Addition: IEC 60619:1993, Electrically operated food preparation appliances — Methods for measuring the performance © BSI 02-2000 3.101 standard container a container with sides of 500 mm ± 10 mm and a height of 200 mm ± 10 mm, the structure being rigid enough to avoid structure-borne noise NOTE An example of adequate load is shown in Figure 102 for the function defined in clause 20 of IEC 60619 (coffee milling and grinding), this test code is only applicable for comparative tests; in this case, the standard test load is roasted beans of coffee available on the national market, preconditioned for 24 h in the test room, with the climatic conditions given in 6.3 Measurement methods and acoustical environments This clause of Part is applicable except as follows: 4.3 Modification: The comparison method described in ISO 3743-1 is not applicable NOTE Measurement according to ISO 3743-1 is under consideration Instrumentation This clause of Part is applicable Operation and location of appliances under test This clause of Part is applicable except as follows: 6.1 Equipping and pre-conditioning of appliances EN 60704-2-11:1999 6.1.1 Addition: For the blending/pureeing function, the test load is contained in the standard container defined in 3.101, except where the appliance cannot operate in the way it is intended for If the standard container cannot be used, the bowl supplied by the manufacturer shall be used, filled at the maximum level defined by the manufacturer The water shall be at the ambient temperature t = 20 °C ± °C 6.1.3 Replacement: Prior to noise measurements, the appliance shall have been in operation for a total period of at least 10 for running-in, under the same conditions as the noise measurement, except for the milling and grinding functions where the running-in period is operated without load This total period of running-in can be reduced if it is verified that this does not affect the noise emission of the appliance under test If this procedure may damage the appliance, proper precautions have to be taken NOTE If the appliance under test is delivered with several accessories, each accessory should be in operation for a suitable period of running 6.1.4 Replacement: Immediately before each series of measurements, the appliance, equipped as for the intended use, is operated during “on” (or less, if specified by the manufacturer), for stabilizing, at the highest speed allowed for the function, and “off” (or more, if specified by the manufacturer) For the milling and grinding functions, the appliance shall be in operation without load 6.2 Supply of electric energy and of water or gas 6.2.2 Addition: Rechargeable food preparation appliances are measured with fully charged batteries and disconnected from the external power source 6.4 Loading and operating of appliances 6.4.2 Replacement: The determination of noise emission shall be carried out for each of the accessories supplied, with the appliance at the maximum speed recommended by the user instructions for the accessory under test If the user instructions not specify this maximum speed, the appliance shall be operated at its maximum obtainable speed NOTE The maximum speed may be attainable — by the maximum speed stable position of a selector or command switch; or — by a continuous user action on the selector or command switch; or — by activating a separate stable or unstable command switch, usually called “Turbo”, “Booster”, “Plus” or similar For those appliances which run under pressure from the hand of the user, it is common to use a tape to simulate this hand pressure Care shall be taken to ensure that these means not change the sound output of the appliance under test Except for the accessories designed for the functions of blending/pureeing, of citrus juice extraction and of coffee milling and grinding, where the acoustical test is carried out with the standard test load defined in 3.102, the acoustical test is carried out without load For the function of blending/pureeing, the purpose of the measurement is to measure the noise produced by the appliance, excluding noise produced by water turbulence in the water-tank For the test, the standard container, as defined in 3.101 shall be used, where the appliance is installed vertically and offset from the centre of the container to a position where the surface of the water will show a minimum of waves The bottom of the appliance shall be at a distance of 50 mm ± mm from the bottom of the tank The acoustical measurement shall begin after 10 s of a running period immediately following the preconditioning period defined in 6.1.4 The duration of the acoustical measurement, in principle, shall be 30 s (or less, if the duty cycle of the appliance does not allow this duration), covering as much as possible the complete running period, except for the milling and grinding functions, where the duration of the acoustical measurement shall be 10 s For declaration purposes, it is recommended that only the function producing the highest noise level be considered 6.5 Location and mounting of appliances 6.5.1 Addition: Wall-mounted appliances, that can be used as counter-top or as table-top appliances shall be tested according to this subclause 6.5.2 Addition: Examples of adequate test fixtures for hand-held appliances are given in Figure 101 6.5.5 Replacement: Appliances for building-in are not built in, but used in the “as received” condition and placed directly, without any resilient means other than those incorporated in the appliance, on the floor or on the reflecting plane © BSI 02-2000 EN 60704-2-11:1999 Measurement of sound pressure levels This clause of Part is applicable except as follows 7.2 Not applicable Calculation of sound pressure and sound power levels Information to be recorded This clause of Part is applicable 10 Information to be reported This clause of Part is applicable This clause of Part is applicable Figure 101 — Examples of test fixtures for hand-held appliances © BSI 02-2000 EN 60704-2-11:1999 Figure 102 — Example of load for citrus juice extraction function © BSI 02-2000 EN 60704-2-11:1999 Annex ZA (normative) Normative references to international publications with their corresponding European publications Addition: Publication Year Title EN/HD Year IEC 60619 1993 Electrically operated food preparation appliances Methods for measuring the performance EN 60619 + corr October 1993 1993 © BSI 02-2000 BS EN 60704-2-11:1999 IEC 60704-2-11:1998 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 possess the latest amendments or editions It is the constant aim of BSI to improve the quality of our products and services We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee 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