IEC 60704-2-13 pdf download

IEC 60704-2-13 pdf download.Household and similar electrical appliances – Test code for the determination of airborne acoustical noise
1 Scope and object
This clause of Part 1 is applicable except as follows: 1 .1 Scope 1 .1 .1 General Addition: These particular requirements apply to electrical range hoods for household and similar use intended for filtering the air of a room or for exhausting the air out of a room, including their accessories and their component parts. It also applies to range hoods with an external fan which may be mounted inside or outside of the room where the range hood is located. 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 range hoods. 1 .1 .3 Size of 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 range hood under test fulfils the requirements specified in 1 .3 of ISO 3743-1 and ISO 3743-2. 1 .2 Object Addition: This standard describes the determination of the noise emission of household range hoods under normal operating conditions and at the highest fan speed setting for normal use. NOTE 1 01 If a boost position is incorporated, this is not taken into account (see 6.5 of IEC 61 591 ). NOTE 1 02 A boost position is a setting of a control for occasional use, which results in a higher temporary fan speed (see 6.5 of IEC 61 591 ). Requirements for the declaration of noise emission values are not within the scope of this standard. NOTE 1 03 For determining and verifying noise emission values declared in product specifications, see IEC 60704-3.
6 Operation and location of appliance under test
This clause of Part 1 is applicable except as follows: 6.1 Equipping and pre-conditioning of appliance 6.1 .1 Addition: Recirculation-air range hoods should be fitted with a clean filter(s). Air-extraction range hoods shall be fitted with the pipe coupling ring, if any, having the largest diameter among those provided by the manufacturer. If the range hood is designed to accommodate additional filters, those filters shall be clean and appropriately fitted. 6.1 .3 Replacement:Prior to noise measurements, the range hood shall have been in operation for running in for at least 4 h at the highest speed setting for normal use (see notes in 1 .2). 6.1 .4 Replacement: Immediately before each series of noise measurements, the range hood equipped for its intended use is operated for stabilizing at the highest speed setting for normal use (see notes in 1 .2) for 1 0 min. 6.2 Supply of electrical energy and of water or gas 6.2.3 and 6.2.4 Not applicable 6.4 Loading and operating of appliance during test 6.4.2 Replacement: The appliances shall be equipped according to 6.1 .1 . The range hood shall be operated at the highest speed setting for normal use (see notes in 1 .2). Air-extraction range hoods shall be loaded using a pipe connected to a muffler according to Figure 1 01 . The pipe shall be rigid with smooth inner walls and shall have the widest diameter among those specified by the manufacturer. If not stated, a standard pipe with the best fitting diameter shall be used. The muffler shall have an insertion loss as specified in the table of Figure 1 01 . It shall have a circular section with the same internal diameter as that of the pipe, a length as specified in Figure 1 01 and shall not have parts protruding inside that may cause additional pressure drops. The pipe and the muffler shall also comply with all the specifications reported in Figure 1 01 and care shall be taken that they do not radiate noise. Range hoods with external fan shall be connected to the fan with a pipe and a muffler according to Figure 1 03. The pipe shall be rigid with smooth inner walls and shall have the widest diameter among those specified by the manufacturer. If not stated, a standard pipe with the best fitting diameter shall be used. The muffler shall be provided with the appliance. If the manufacturer did not provide a muffler, the appliance is tested without muffler.