A circuit in an integrated circuit for measuring temperature dependent voltages of a temperature sensing element includes a voltage generator circuit providing the temperature dependent voltages, a first sampling switch and a second sampling switch. The triboelectric material may be exposed by a finishing process that results in removal of a portion of the material leaving voids in the surface. The printed display sheet print fields may then each be affixed to a corresponding memorial item print field on the memorial item. As the protocol monitor function is incorporated, a protocol monitor does not need to be newly plugged into the network as an external device after the occurrence of abnormality, and the data that becomes the cause can be held from the abnormality that occurred first by monitoring from the beginning of the operation of the system and can be used for analysis.