PURPOSE: To hardly necessitate fitting space and to simply execute proper using corresponding to equipment by making a constitution to possess an electric integrating means to integrate the using time of the equipment and an electric storing means to store an integrated result from the integrating means.

CONSTITUTION: A switch part 6 is made to be controlled by a microcomputer 11 used for the functional control of a project circuit part 3 and it is programmed so as to count power source supplying time to a lamp for light source 7 and to integrate it every power source supply and a memory 12 that the writing/reading control of time data is executed by the microcomputer 11 to store an integrated result. Accordingly, the system is constituted electrically and the announciation of it is executed with using a video display part 4 possessed by equipment itself for instance and also the proper using corresponding to the equipment can be simply by the program processing of the microcomputer 11. Thus, the proper using corresponding to the equipment can be realized by the program processing of the microcomputer with small fitting space.