IEC 60704-2-1:2020 pdf download – HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES – TEST CODE FOR THE DETERMINATION OF AIRBORNE ACOUSTICAL NOISE – Part 2-1: Particular requirements for dry vacuum cleaners.
2 Normative references This clause of Part 1 is applicable except as follows: Addition: IEC TS 62885-1, Surface cleaning appliances – Part 1: General requirements on test material and test equipment ISO 3743-1:2010, Acoustics – Determination of sound power levels and sound energy levels of noise sources using sound pressure – Engineering methods for small movable sources in reverberant fields – Part 1: Comparison method for a hard-walled test room ISO 3744:2010, Acoustics – Determination of sound power levels and sound energy levels of noise sources using sound pressure – Engineering methods for an essentially free field over a reflecting plane 3 Terms and definitions This clause of Part 1 is applicable except as follows: Addition: 3.101 cleaning head plain nozzle or brush attached to a connecting tube, or a power nozzle, separate or part of the cleaner housing, and that part of a dry vacuum cleaner which is applied to a surface to be cleaned [SOURCE: IEC 62885-2:2016, 3.3] 3.102 active nozzle cleaning head provided with a driven agitation device to assist dirt removal Note 1 to entry: The agitation device can be driven by an incorporated electric motor (motorized nozzle), an incorporated turbine powered by the air flow (air-turbine nozzle) or an incorporated friction or gear mechanism actuated by moving the cleaning head over the surface to be cleaned (mechanical nozzle). [SOURCE: IEC 62885-2:2016, 3.4] 3.103 standard Wilton test carpet Wilton carpet on which the vacuum cleaner and its cleaning head is placed for the measurement Note 1 to entry: The specification of the standard Wilton test carpet can be found in IEC TS 62885-1.
3.104 standard hard floor part of the floor on which the vacuum cleaner and its cleaning head is placed for the measurement 4 Measurement methods and acoustical environments This clause of Part 1 is applicable except as follows: 4.2 Direct method Addition: If pure tone components are present in the noise emitted by the source, the estimated standard deviation of the measured sound pressure levels in the special reverberation room may increase. In such cases additional microphone positions or source positions may be necessary, as specified in ISO 3743-2. 4.3 Comparison method Addition: If pure tone components are present in the noise emitted by the source, the estimated standard deviation of the measured sound pressure levels in the hard-walled test room or in the special reverberation room may increase. In such cases additional microphone positions or source positions may be necessary, as specified in ISO 3743-1 or ISO 3743-2. 5 Instrumentation This clause of Part 1 is applicable except as follows: 5.1 Instrumentation for measuring acoustical data Addition: The use of a windscreen is recommended. If necessary, the observed sound pressure level shall be corrected for changes in the microphone sensitivity, in accordance with the instructions accompanying the instrumentation. 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 appliances 6.1.1 Replacement: The tube grip of cleaners with suction hose or the handle of other cleaners shall be held at a height of (800 ± 50) mm above the test surface. Any telescopic suction tubes or sticks shall be extended to maximum length. For nozzles without pivoting connectors, it shall be ensured that the bottom of the cleaning head be made parallel with the test surface by adjusting the handle height within the tolerances. If this is not possible, the length of a telescopic tube or stick may be adjusted. Any adjustment shall be reported.
For declaration and compliance purposes, related tests conducted on a surface type (carpet or hard surface with or without crevice) shall be conducted with the same dry vacuum cleaner setting configurations such as power, cleaning head and cleaning head setting. Unless otherwise specified, the dry vacuum cleaner setting configurations, such as cleaning head and cleaning head setting, shall be used and adjusted in accordance with the manufacturer’s instructions for the surface to be cleaned (e.g. carpet or hard floor) for the test to be carried out. In the absence of unambiguous instructions within the manufacturer’s instructions, the product shall be tested with settings that are in accordance with any explicitly clear text, symbol or pictogram that is identifiable on the product. If, after following the above order of checks, the tester believes the device under test to be in a configuration that is ambiguous, or that multiple configurations are possible with no way to clearly determine which is the most suitable for a given task, then the manufacturer shall be contacted for additional guidance.