Patent ID: 8742306

Claim:
An apparatus for transferring electromagnetic energy to an energy application zone via a source of electromagnetic energy, the apparatus comprising: a processor configured to: execute a selftest of the apparatus, wherein the selftest comprises causing the source to supply energy to the energy application zone when the energy application zone is substantially empty, and to determine at least a portion of primary calibration information, wherein the primary calibration information includes an indicator of an amount of power consumed by loss constituents associated with the apparatus when the energy application zone is substantially empty; determine a target amount of energy to be dissipated in an object located at least partially in the energy application zone; determine an estimated amount of energy that was dissipated in the object based on the primary calibration information, an amount of energy returned from the energy application zone, and an amount of energy supplied to the energy application zone; and cause the source to transfer energy to the energy application zone at least until the estimated amount of energy equals the target amount of energy.