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Computer controlled energy monitoring system

  • US 4,933,633 A
  • Filed: 07/28/1988
  • Issued: 06/12/1990
  • Est. Priority Date: 06/09/1981
  • Status: Expired due to Fees
First Claim
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1. A power meter comprising:

  • multiplier means having a first input receiving a signal representative of current flow through an electrical path and a second input receiving a signal representative of voltage on said electrical path, said multiplier means producing an output signal representative of the electrical power being consumed through said electrical path, means for detecting whether the signal level at the output of said multiplier means is within a predetermined signal level range, programmable amplifying means for varying the amplitude of a signal applied to one of the inputs of said multiplier means in accordance with a programmed value, a counter for counting a counting signal, means for repeatedly supplying a counting signal to said counter until said detector indicates the output of said multiplier means is within said predetermined signal level range, and, means for decoding the contents of said counter to form said programmed value and for supplying said programmed value to said programmable amplifying means.

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