DANSK DS/EN IEC 60704-2-8 PDF

This clause of IEC 60704-1:2010 is applicable except as follows: 1.1 Scope 1.1.1 General Replacement: This document applies to electric shavers, hair clippers or trimmers for domestic and similar use, supplied from mains or secondary batteries or primary batteries. The term "similar use" is understood to mean the use in hotels, hospitals, shops, offices, etc. NOTE 101 This document does not apply to shavers, hair clippers or trimmers that are powered by means other than electrical, for example by a spring-device. NOTE 102 If possible, this document can also be applied to analogous electrically operated devices, such as depilating devices. 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 shavers, hair clippers or trimmers 1.1.3 Size of the source Replacement: The method specified in ISO 3744:2010 is applicable to noise sources of any size. Limitations for the size of the source are given in Subclause 1.2 of ISO 3743-1:2010 and Clause 5 of ISO 3743-2:2018. 1.2 Object Addition: Requirements for the declaration of noise emission values are not within the scope of this document. NOTE 101 For determining and verifying noise emission values declared in product specifications, see IEC 60704-3. 1.3 Measurement uncertainty Replacement: The estimated values of standard deviations of sound power levels determined in accordance with this document are given in Table 101. Table 101 – Standard deviations of sound power levels Standard deviation (dB) σr (repeatability) σR (reproducibility) 0,4 0,8 Addition: 1.101 Standard deviation for declaration and verification For the purpose of determining and verifying declared noise emission values in accordance with IEC 60704-3, the values in Table 102 apply. Table 102 – Standard deviations for declaration and verification Standard deviation (dB) σP (production) σt (total) σM (reference) 0,7 to 1,3 1,1 to 1,5 1,5