Disclosed are a method and an apparatus for generating and collecting a secondary compound that includes daughter isotope, such as 68Ga, resulting from the decay of a parent isotope, such as 68Ge, present in a precursor compound. Ventilation means are provided inside the insert such that an air current may be created and further that the air current may be led past the electrical installation, such that the overall heat accumulation inside the device may be drastically reduced. The method further comprises configuring a temporary address for an interface of a sub-element, retrieving an identifier of the network element and defining an address for the interface of the sub-element by including the identifier of the network element to the temporary address.