| 摘要 |
This power meter (100) is provided with a first control device (108), which carries out signal transmission and reception with a display unit (104) and an external communication unit (105), as well as a security sensor (109). A second control device (207) of the security sensor (109) generates a sensor log showing an output value level history for a plurality of sensors (201)-(205). The first control device (108), upon returning to a normal operation state from an abnormal state in which normal operation is impossible, acquires the sensor log for the period of the abnormal state from the second control device (207), and generates an action estimation log showing a type of fraudulent activity estimated from said sensor log. |
