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Method of Checking the Function of a Sensor

  • US 20060219575A1
  • Filed: 03/20/2006
  • Published: 10/05/2006
  • Est. Priority Date: 04/01/2005
  • Status: Active Grant
First Claim
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1. A method of checking the function of an amperometric electrochemical sensor which comprises an electrochemical cell, comprising the steps of:

  • a. applying a constant polarization voltage to the electrochemical cell, the first application of the constant polarization voltage being a constant initial polarization voltage;

    b. applying a perturbation quantity to the electrochemical cell;

    c. determining at least one response of the electrochemical cell in the presence of the perturbation;

    d. determining a check value by using the at least one electrochemical cell response;

    e. comparing the check value to a limit value to determine a variance;

    f. changing the constant polarization voltage by one increment and repeating steps a. through e. with the changed polarization voltage, if the variance is positive; and

    g. confirming the polarization voltage as an optimal polarization voltage if the variance is zero or negative.

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