| 摘要 |
A device to be monitored plugs into the event counter apparatus which, in turn, plugs into a power source. The event counter apparatus monitors the flow of power from the power source, such as a wall outlet, to the device to be monitored. Each time the device to be monitored is powered on, current flows through the event counter apparatus. The current flow is detected and logged as an event. Event counter apparatus internal circuitry maintains a count of the number of times a device is powered on and off. The count is displayed on a display window of the event counter apparatus. The event counter apparatus may also include self-calibrating circuitry that stores a profile of the device's typical operating characteristics. The stored profile acts as a "fingerprint". When activity outside the fingerprint is detected an alarm can be activated to inform an observer to an anomalous status. In addition, RF circuitry may also be included to allow the event counter apparatus to forward its status and results to another device such as a computer, and to receive instructions from the other device. |
