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BS EN 60704-2-4:2012+A11:2020

BS EN 60704-2-4:2012+A11:2020

$102.76

Household and similar electrical appliances. Test code for the determination of airborne acoustical noise – Particular requirements for washing machines and spin extractors

Published By Publication Date Number of Pages
BSI 2020 22
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This clause of Part 1 is applicable except as follows:

1.1 Scope

1.1.1 General

Addition:

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.

NOTE 101 For drying function, see IEC 60704-2-6.

1.1.2 Types of noise

Replacement:

The methods specified in ISO 3743-1, ISO 3743-2 and ISO 3744 can be used for measuring noise emitted by washing machines and spin extractors.

1.1.3 Size of the source

Replacement:

The method specified in ISO 3744 is applicable to noise sources of any size. When applying ISO 3743-1 and ISO 3743-2, care should be taken that the maximum size of the washing machine or spin extractor under test fulfils the requirements specified in 1.3 of ISO 3743-1 and ISO 3743-2.

PDF Catalog

PDF Pages PDF Title
2 undefined
7 English
CONTENTS
8 FOREWORD
10 INTRODUCTION
11 1 Scope and object
1.1 Scope
1.2 Object
1.3 Measurement uncertainty
12 1.101 Standard deviation for declaration and verification
2 Normative references
3 Terms and definitions
Tables
Table 101 – Standard deviations of sound power levels for washing machines
Table 102 – Standard deviations of sound power levels for spin extractors
Table 103 – Standard deviations for declaration and verification for washing machines
Table 104 – Standard deviations for declaration and verification for spin extractors
13 4 Measurement methods and acoustical environments
4.2 Direct method
14 4.3 Comparison method
5 Instrumentation
5.3 Instrumentation for measuring operating conditions
6 Operation and location of appliances under test
6.1 Equipping and pre-conditioning of appliances
6.2 Supply of electric energy and of water or gas
15 6.4 Loading and operating of appliances during tests
6.5 Location and mounting of appliances
6.101 Standard test programme for noise measurements
6.102 Standard test load for noise measurements
17 7 Measurement of sound power levels
7.1 Microphone array, measurement surface and RSS location for essentially free-field conditions over reflecting plane(s)
7.4 Measurements
8 Calculation of sound pressure and sound power levels
8.101 Final result
18 9 Information to be recorded
9.2 Description of appliance under test
9.7 Electric supply, water supply, etc.
9.9 Operation of the appliance under test
9.12 Measured data
10 Information to be reported
10.3 Test conditions for the appliance
19 10.4 Acoustical data
20 Annexes
Annex A(normative)
21 Bibliography

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BS EN 60704-2-4:2012+A11:2020
$102.76