Test code for the determination of airborne acoustical noise
IEC 60704-2-8-2020 pdf download.Household and similar electrical appliances — Test code for the determination of airborne acoustical noise — Part 2-8: Particular requirements for electric shavers, hair clippers or trimmers
Appareils electrodomestiques et analogues — Code d’essai pour Ia determination du bruit aérien — Partie 2-8: Exigences particulières pour les rasoirs et les tondeuses a barbe ou a cheveux electriques.
Shavers, hair clippers or trimmers shall be equipped as for ordinary shaving, clipping or trimming. Shavers, hair clippers or trimmers with a cutting selector shall be adjusted in such a way that the cutting head is In the least visible position that the construction allows.
The shaver, hair clipper or trimmer shall be clean, including the hair chamber, if any. The appliance shall be oiled with a light oil having a viscosity not exceeding 20 cSt at 50 C, If the manufacturer prescribes a different method of cleaning or lubrication, the manufacturer’s method should be followed.
NOTE 101 During handling, take care to avoid any damage, especially to the cutting parts of the appliance as these parts tend to be very delicate
6.1.3
Replacement:
Prior to noise measurements, the appliance shall have been in operation for at least 10 mm, unless otherwise specified by the manufacturer.
6.1.4
Replacement:
Immediately before each series of noise measurements, the appliance is operated for 35 s ±
5 s to stabilize, without load, at the highest speed
6.2 Supply of electric energy and of water or gas
6.2.2
Replacement:
Battery-operated shavers, hair clippers or trimmers are started, for noise measurements, with fully loaded batteries as specified by the manufacturer. The batteries have to be replaced when the voltage under load has dropped below 0,9 times the battery voltage under load with fully loaded batteries.
Rechargeable shavers, hair clippers or trimmers are measured with fully charged batteries, and disconnected from any external power source.
6.4 LoadIng and operating of appliances during tests
6.4.1
Replacement:
The shaver, hair clipper or trimmer is to be measured under no-load condition. If speed control is provided, the highest speed setting has to be chosen.
When shavers, hair clippers or trimmers are equipped with more than one cutting head and If a cutting selector for cutting heads is available, the selector setting that gives the highest noise value shall be used.
Shavers can be equipped with a trimmer accessory. When the trimmer accessory can be switched on and off, the following measurements shall be made:
— only shaving heads, and the following measurements could be made:
— shaving heads + trimmer accessory (if possible);
— only trimmer accessory (if possible).
If there Is more than one position for the trimmer accessory, the trimmer accessory position that gives the highest noise value shall be measured.
6.4.3
Addition:
For shavers that operate with an operational cycle, the loudest part of the cycle should be measured. This is preferably done by forcing the machine to operate In this loud part of the cycle. If this is not possible, the actual measurement should be done during that particular loud part of the cycle.
6.5 Location and mounting of appliances.IEC 60704-2-8-2020 pdf download.