Abstract: Described are a system and method for monitoring pre-prepared meals which can be assembled as a plurality of portions. Assembled pre-prepared meals can be monitored starting from their assembly up to the ultimate consumption. Pre-prepared meals are arranged on tray-like containers and a data carrier is fastened which contains meal-specific data. These meal-specific data can be read out at at least two reading stations to be able to keep a record of the conditions of manufacture, storage and/or cooling.

Abstract: A consumer unit (7) for converting inductively transmitted electric power. The device comprises at least one secondary coil (5) for accepting power from a alternating electromagnetic field. The secondary coil (5) is electrically connected to at least one consumer in which the electric power is converted. The consumer unit (7) is designed as a replaceable module for an induction furnace (25).

Abstract: The invention relates to a device for heating up meals. It comprises a housing which can be closed by means of a door and shields the surroundings from electromagnetic waves. One or more functional trays which contain one or more induction coils are held within the housing, in order to be able to inductively heat up meals held in containers so that they can be consumed. The object of the invention is to increase the operational reliability of a device of this type. According to the invention, an electrically conducting element is therefore present on end faces of functional trays which are oriented in the direction of a door opening in the housing. Each individual electrically conducting element is also connected to the local potential, housing potential and/or ground potential, in order to be able to ensure that the surroundings are shielded from electromagnetic waves, even when the housing door is open.