IEC 60704-2-4:2011

Household and similar electrical appliances - Test code for the determination of airborne acoustical noise - Part 2-4: Particular requirements for washing machines and spin extractors

IEC 60704-2-4:2011 These particular requirements apply to single unit electrical washing machines and the washing and spinning function of combined appliances for household and similar use and to spin extractors for household and similar use. This third edition cancels and replaces the second edition (2001). Main changes are:
- measurement uncertainty and standard deviations are taken into account,
- definitions of standard test load and standard test program are modified,
- test enclosure was replaced by common test enclosure defined in Part 1 and
- information to be reported is modified.
This publication is to be read in conjunction with  IEC 60704-1:2010.

Appareils électrodomestiques et analogues - Code d'essai pour la détermination du bruit aérien - Partie 2-4: Exigences particulières pour les machines à laver le linge et les essoreuses centrifuges

La CEI 60704-2-4:2011 Les présentes exigences particulières s'appliquent à des machines à laver électriques monofonction, à des appareils combinant les fonctions de lavage et d'essorage pour usage domestique et analogue, et à des essoreuses centrifuges pour usage domestique et analogue. La présente troisième édition annule et remplace la deuxième édition (2001). Les principales modifications sont les suivantes:
- prise en compte de l'incertitude de mesure et des écarts-types,
- modification des définitions de la charge d'essai normalisée et du programme d'essai normalisé,
- remplacement du meuble d'essai par le meuble d'essai commun défini dans la partie 1,
- modification des informations à fournir.
Cette publication doit être lue conjointement avec la CEI 60704-1:2010.

General Information

• Status: Published
• Publication Date: 16-Nov-2011
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 17.140.20 - Noise emitted by machines and equipment
• ICS: 97.060 - Laundry appliances
• Technical Committee: SC 59D - Performance of household and similar electrical laundry appliances
• Current Stage: PPUB - Publication issued
• Start Date: 29-Feb-2012
• Completion Date: 17-Nov-2011

Relations

• Revises: IEC 60704-2-4:2001 - Household and similar electrical appliances - Test code for the determination of airborne acoustical noise - Part 2-4: Particular requirements for washing machines and spin extractors
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60704-2-4 ®
Edition 3.0 2011-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Test code for the determination of
airborne acoustical noise –
Part 2-4: Particular requirements for washing machines and spin extractors

Appareils électrodomestiques et analogues – Code d'essai pour la détermination
du bruit aérien –
Partie 2-4: Exigences particulières pour les machines à laver le linge et les
essoreuses centrifuges
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IEC 60704-2-4 ®
Edition 3.0 2011-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Test code for the determination of
airborne acoustical noise –
Part 2-4: Particular requirements for washing machines and spin extractors

Appareils électrodomestiques et analogues – Code d'essai pour la détermination
du bruit aérien –
Partie 2-4: Exigences particulières pour les machines à laver le linge et les
essoreuses centrifuges
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX Q
ICS 17.140.20; 97.060 ISBN 978-2-88912-789-4

– 2 – 60704-2-4 © IEC:2011
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope and object . 6
1.1 Scope . 6
1.2 Object . 6
1.3 Measurement uncertainty . 6
1.101 Standard deviation for declaration and verification . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Measurement methods and acoustical environments . 8
4.2 Direct method . 8
4.3 Comparison method . 9
5 Instrumentation . 9
5.3 Instrumentation for measuring operating conditions . 9
6 Operation and location of appliances under test . 9
6.1 Equipping and pre-conditioning of appliances . 9
6.2 Supply of electric energy and of water or gas . 9
6.4 Loading and operating of appliances during tests . 10
6.5 Location and mounting of appliances . 10
6.101 Standard test programme for noise measurements . 10
6.102 Standard test load for noise measurements . 10
7 Measurement of sound power levels . 12
7.1 Microphone array, measurement surface and RSS location for essentially
free-field conditions over reflecting plane(s) . 12
7.4 Measurements . 12
8 Calculation of sound pressure and sound power levels . 12
8.101 Final result . 12
9 Information to be recorded. 13
9.2 Description of appliance under test . 13
9.7 Electric supply, water supply, etc. . 13
9.9 Operation of the appliance under test . 13
9.12 Measured data . 13
10 Information to be reported . 13
10.3 Test conditions for the appliance . 13
10.4 Acoustical data . 14
Annexes . 15
Annex A (normative) . 15
Bibliography . 16

Table 101 – Standard deviations of sound power levels for washing machines . 7
Table 102 – Standard deviations of sound power levels for spin extractors . 7
Table 103 – Standard deviations for declaration and verification for washing machines . 7
Table 104 – Standard deviations for declaration and verification for spin extractors . 7

60704-2-4 © IEC:2011 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
TEST CODE FOR THE DETERMINATION
OF AIRBORNE ACOUSTICAL NOISE –

Part 2-4: Particular requirements for washing machines
and spin extractors
FOREWORD
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International Standard IEC 60704-2-4 has been prepared by subcommittee 59D: Home
laundry appliances, of IEC technical committee 59: Performance of household and similar
electrical appliances.
This third edition cancels and replaces the second edition (2001). Main changes are:
• measurement uncertainty and standard deviations are taken into account,
• definitions of standard test load and standard test program are modified,
• test enclosure was
...