12.2 Replacement:For machines with one or more rated voltages, the machine is operated at each rated voltage under the load conditions specified in 12.2.1. Without any further alteration of the applied torque, the voltage is then adjusted to 0,94 times the rated voltage and 1,06 times the rated voltage.The temperatures are measured at the most unfavourable of the two voltage settings. The temperatures that are measured by means of thermocouples are taken while the machine is operating.For machines with a rated voltage range, the machine is operated– at the lower limit of the rated voltage range, under the load conditions specified in 12.2.1, and without any further alteration of the applied torque, the voltage is then adjusted to 0,94 times the lower limit of the rated voltage range;and– at the upper limit of the rated voltage range, under the load conditions specified in 12.2.1, and without any further alteration of the applied torque, the voltage is then adjusted to 1,06 times the upper limit of the rated voltage range.The temperatures are measured at the most unfavourable of the two voltage settings. The temperatures that are measured by means of thermocouples are taken while the machine is operating.12.2.1 Replacement:The load conditions for the heating test of 12.2 are as follows:The machine is loaded by the application of a torque until thermal equilibrium is reached.For lawn trimmers, lawn edge trimmers and grass trimmers that cannot be converted to a brush cutter or brush saw in accordance with 8.14.2 a) 104), at the manufacturer's discretion, the torque may be applied by either– an external load; or– extending or modifying the cutting elementssuch that when supplied at rated voltage the machine operates at rated input or rated current.For brush cutters, brush saws and grass trimmers that can be converted to a brush cutter or brush saw in accordance with 8.14.2 a) 104), the torque is applied by means of an external load such that when supplied at rated voltage the machine operates at rated input or rated current.