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Method of controlling a sensor for determining an oxygen concentration in a gas mixture

  • US 6,301,951 B1
  • Filed: 08/25/1999
  • Issued: 10/16/2001
  • Est. Priority Date: 08/25/1998
  • Status: Expired due to Fees
First Claim
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1. A method of controlling a sensor for determining an oxygen concentration in a gas mixture, comprising the steps of:

  • transforming, by a circuit arrangement, a detection voltage supplied by a Nernst measurement cell and corresponding to an oxygen concentration into a pump voltage for a pump cell, one of an anodic limit current and a cathodic limit current flowing over the pump cell, depending on an oxygen content of the gas mixture; and

    in a stable operation of the sensor, during which the anodic limit current flows for a selectable period of time, supplying at least one voltage pulse independently by at least one of a measured detection voltage and an established pump current to at least one of the pump cell and the Nernst measurement cell, so that the sensor is depolarized.

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