| 摘要 |
A remote monitoring unit as shown in the figure is coupled to an electronic meter (140, 142, 144). The remote monitoring unit communicates with a central computer (112) via a communication network (110, 152). The remote monitoring unit is configured to detect a noise signal or footprint generated by the electronic meter when the meter is functioning properly and the meter is properly coupled to the remote monitoring unit. If the remote monitoring unit detects a change in the noise signal, the remote monitoring unit sends a signal to the central computer. The signal may notify the central computer that the meter has lost power, restored power, malfunctioned, or has been disconnected from the remote monitoring unit.
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