1、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: Particular requirements forelectrically operated food preparation appliances The European Standard EN 60704-2-11:1999 has the
2、 status of a British Standard ICS 17.140.20; 97.040.50BSEN60704-2-11:1999 This British Standard, having been prepared under the directionof the ElectrotechnicalSector Committee, was published underthe authority of the Standards Committee and comesinto effect on 15 April1999 BSI 02-2000 ISBN 0 580 32
3、256 4 National foreword This British Standard is the English language version of EN60704-2-11:1999. 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,
4、 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 d
5、evelopments and promulgate them in the UK. A list of organizations represented on this subcommittee can be obtained on request to its secretary. From 1 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 p
6、eriod 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
7、 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 Standa
8、rds 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 page
9、s This document comprises a front cover, an inside front cover, pages i and ii, theENtitlepage, pages 2 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 insi
10、de front cover. Amendments issued since publication Amd. No. Date CommentsBSEN60704-2-11:1999 BSI 02-2000 i Contents Page National foreword Inside front cover Foreword 2 Text of EN 60704-2-11 3ii blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60704-2-11 January 1999 ICS 70.140.20; 97.040.
11、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 (IEC60704-2-11:1998) Appareils lectrodomestiques et analogues Code dessai pour la dterm
12、ination du bruit arien Partie 2-11: Rgles particulires pour les appareils lectriques destins la prparation de la nourriture (CEI 60704-2-11:1998) Prfvorschrift fr die Bestimmung der Luftschallemission von elektrischen Gertenfr den Hausgebrauch und hnlicheZwecke Teil 2-11: Besondere Anforderungen fre
13、lektrisch betriebene Speisezubereitungsgerte (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 sta
14、ndard 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 ot
15、her 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, CzechRepublic, Denmark, Finland,
16、 France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung
17、 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 EEN60704-2-11:1999 BSI 02-2000 2 Foreword The text of document 59G/86/FDIS, future edition 1 of IEC 60704
18、-2-11, prepared by SC59G, Small kitchen appliances, of IEC TC59, 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: This part 2 of EN 60704 is to be used in conjunc
19、tion with EN 60704-1:1997, Household and similar electrical appliances Test code for the determination of airborne acoustical noise Part1:General requirements. This part 2 supplements or modifies the corresponding clauses of EN 60704-1. Where a particular clause or subclause of part1 is not mentione
20、d in this part2, that clause or subclause applies as far as is reasonable. Where this part 2 states “addition”, “modification” or “replacement”, the relevant text of part 1 is to be adapted accordingly. Subclauses and figures which are additional to those in part1 are numbered starting from101. Anne
21、xes which are additional to those in part1 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 app
22、roved by CENELEC as a European Standard without any modification. Contents Page Foreword 2 Introduction 3 1 Scope and object 3 2 Normative references 3 3 Terms and definitions 3 4 Measurement methods and acoustical environments 3 5 Instrumentation 3 6 Operation and location of appliances under test
23、3 7 Measurement of sound pressure levels 5 8 Calculation of sound pressure and sound power levels 5 9 Information to be recorded 5 10 Information to be reported 5 Annex ZA (normative) Normative referencestointernational publications withtheircorresponding European publications Insidebackcover Figure
24、 101 Examples of test fixtures for hand-held appliances 5 Figure 102 Example of load for citrus juice extraction function 6 latest date by which the ENhas to be implemented at national level by publication of an identical national standard or by endorsement (dop) 1999-10-01 latest date by which the
25、national standards conflicting with the EN haveto be withdrawn (dow) 2001-10-01EN60704-2-11:1999 BSI 02-2000 3 Introduction 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 carrie
26、d 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. NOTEAs stated in the introduction to IEC60704-1, this test code is concerned with airborne noise only. 1 Sco
27、pe and object This clause of Part1 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 att
28、achments 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 clause4 of IEC60619. Limitations for the use
29、of this test code are given inthe scope of IEC60704-1. 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 grin
30、ding), 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. NOTEFor determining and verifying noise emission values declared in product specifications, see IEC 60704-3. 2 Normative references Thi
31、s clause of Part 1 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, Ele
32、ctrically operated food preparation appliances Methods for measuring the performance. 3 Terms and definitions This clause of Part 1 is applicable except as follows: Addition: 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 enoug
33、h to avoid structure-borne noise 3.102 standard test loads for noise measurement 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 5 C, filling the standard container with a depth of150mm 5mm for the function d
34、efined in clause 19 of IEC 60619 (citrus juice extraction), the standard test load is a force of 30N exerted on the cone without, if possible, any perturbation of the rotating speed of the appliance and of the acoustical field NOTEAn example of adequate load is shown inFigure 102. for the function d
35、efined 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 for24h in the test room, with the climatic conditions given in6.3
36、4 Measurement methods and acoustical environments This clause of Part 1 is applicable except as follows: 4.3 Modification: The comparison method described in ISO 3743-1 is not applicable. NOTEMeasurement according to ISO 3743-1 is under consideration. 5 Instrumentation This clause of Part1 is applic
37、able. 6 Operation and location of appliances under test This clause of Part 1 is applicable except as follows: 6.1 Equipping and pre-conditioning of appliances5 + 0EN60704-2-11:1999 4 BSI 02-2000 6.1.1 Addition: For the blending/pureeing function, the test load is contained in the standard container
38、 defined in3.101, 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 5
39、C. 6.1.3 Replacement: Prior to noise measurements, the appliance shall have been in operation for a total period of at least10min 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. Th
40、is 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. NOTEIf the appliance under test is delivered with several accessories, each access
41、ory 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 1 min “on” (or less, if specified by the manufacturer), for stabilizing, at the highest speed allowed fo
42、r the function, and2min “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 char
43、ged 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 th
44、e accessory under test. If the user instructions do not specify this maximum speed, the appliance shall be operated at its maximum obtainable speed. NOTEThe 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 sel
45、ector 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 ens
46、ure that these means do 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 in3
47、.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 in3.101 sha
48、ll 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 of50mm 5mm from the bottom of the tank. The acoustical measurement shall b
49、egin after10s of a running period immediately following the preconditioning period defined in6.1.4. The duration of the acoustical measurement, in principle, shall be30s (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 be10s. For declaration purposes, it is recommended that only the function producing the highest nois
