Monitoring and compensating for temperature-related error in an electrochemical sensor
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United States of America Patent
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Aug 16, 2011
Grant Date -
Jan 29, 2009
app pub date -
Sep 5, 2008
filing date -
Oct 23, 2007
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Abstract
A method for compensating for a temperature-related error in an electrochemical sensor without using separate sources of temperature measurement by measuring sensor current, temporarily lowering sensor voltage to a first level below a reaction-sustaining threshold, measuring a first offset current, adjusting sensor voltage to a second level below the threshold, measuring a second offset current, calculating a difference between the offset currents, deriving a temperature compensation value from the difference based on empirical data, and adding the value to the measured sensor current. A computer system may execute the method as an algorithm stored in memory, provide automatic control of the sensor, and provide continuous display of corrected output values.
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