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Verifying speaker operation during alarm generation

  • US 7,911,353 B2
  • Filed: 06/02/2008
  • Issued: 03/22/2011
  • Est. Priority Date: 06/02/2008
  • Status: Active Grant
First Claim
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1. A method for verifying operation of a speaker for a dialysis machine, comprising:

  • generating an audio alarm for the dialysis machine by sending electric power to a speaker;

    sensing a waveform of the electric power;

    verifying the waveform conforms with a power consumption by the speaker; and

    visually alarming or placing the dialysis machine in a safe mode if the waveform fails to conform with a reference waveform of a correctly functioning speaker.

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