A mark comprising at least one set of calibration periodic structures and at least two sets of test periodic structures, both types of which are positioned along an axis. is reduced in the firing step, the magnetic body part is subsequently oxidized to ensure the original characteristics. The alarm includes a first alarm state associated with a first event relating to the treatment parameter and a second alarm state associated with a second event. 42N which is powered from a power source 50 to operate and an interface 12 to which an extension device 20 is to be connected. When verifying the threshold voltage of the memory cell, the control section causes the voltage generating circuit to generate verify voltage which is the same as readout voltage generated at the time of data readout from the memory cell. Caller information is transferred together with the transfer of the service.