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).