EARTHQUAKE DETECTING DEVICE

摘要

PROBLEM TO BE SOLVED: To solve such problems that a testing circuit for applying adequate testing voltage is necessary even in a capacity type sensor, and a testing device should be carried to the installing place of the capacity type sensor in order to conduct a periodical check at the installed site of a chemical plant or the like. SOLUTION: A mechanical earthquake sensor 61 is fixed to a circuit board 76 through a supporting member, and when a vibration detecting test of the earthquake sensor 61 is conducted, the finger is put into from a notch 77 formed on the lower surface of a front panel 71, and furthermore put into a hole (a vibration imparting means) 61b installed on the bottom of the earthquake sensor 61 to give vibration to a vibration piece 61a.