GB/T 4214.8-2021Test method for noise of household and similar electrical appliances - Particular requirements for electric cooking ranges, ovens, grills, microwave ovens and any combination of these (English PDF)

1.1 Scope

1.1.1 General

Addition.

This Part of GB/T 4214 apply to electric cooking ranges, ovens, grills, microwave ovens and

any combination of these for household and similar use.

NOTE 101.This Part do not apply to hobs due to lack of standardized load (pans) representative of

normal use and ensuring a good repeatability of tests. For these applications, the loading and operating

conditions are under consideration.

This Part does not apply to appliances or parts of appliances that use gas energy.

1.1.2 Types of noise

Replacement.

The methods specified in GB/T 6881.2, GB/T 6881.3 and GB/T 3767 can be used for measuring

noise emitted by electric cooking ranges, ovens, grills, microwave ovens and any combination

of these.

1.1.3 Size of the source

Replacement.

The method specified in GB/T 3767 is applicable to noise sources of any size. When applying

GB/T 6881.2 and GB/T 6881.3, care should be taken that the maximum size of the appliance

under test fulfils the requirements specified in 1.3 of GB/T 6881.2 and GB/T 6881.3.

type as the standard exhaust system shall be used for connection of the appliance to the standard

exhaust system.

6.1.2 Replacement.

Prior to noise measurements, the appliance, equipped according to 6.1.1, shall have been in

operation at maximum speed and power for at least 10 min. The load shall be chosen according

to 3.111.

6.1.3 Replacement.

Stabilizing is included in operating, according to 6.4.2.

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 appliances during test

6.4.2 Replacement.

Unless otherwise specified in this standard, for each function settings shall be chosen that

produce the highest noise emission. As a result, the highest noise emission value from all

functions shall be reported. Any cleaning mode shall be disregarded.

In the case of multiple cavity ovens, the multiple cavities shall be operated simultaneously.

NOTE 101.In general, the highest noise emission occurs at the highest air circulation, turntable speed,

rotisserie speed, fan speed, microwave power, etc. When provided, the manufacturer's instructions

should be taken into account.

For microwave function, including all possible combined functions, a load according to 3.111

shall be applied. Measurements shall be started 2 min after switching on and shall be finished

before boiling occurs.

For other heating functions, temperature conditions shall be as follows.

- boiling temperature of water for steam function;

- 175 °C for ovens with forced air circulation heating function and hot steam function;

- 200 °C for all other heating functions;

- maximum setting for grill function.

Measurements shall be started when the specified temperature is reached. On grills,

measurements shall be started 15 min after switching on.

NOTE 102.If there is no indicator, reaching of the specified temperature could be controlled with a

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