This amendment includes the following significant technical changes:- the usable volume is renamed to calculated volume and the measurement method for the calculated volume is revised (see 7.2), which is in accordance with IEC 60350-1;- new definitions for microwave function, combination microwave function, set to off mode, set to standby mode, cooling down period and food support in Clause 3;- a method for measuring the energy consumption of the microwave function in Clause 14;- more precise requirements for instruments and measurements in Table 2;- additional product specific requirements for measuring the energy consumption of low power modes in Clause 15;- a method for measuring the energy consumption for the cooling down period in Annex F (informative).