System for calibrating dissolved oxygen analyzers using compressed fluids during cleaning
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United States of America Patent
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Jan 5, 2010
Grant Date -
Mar 20, 2008
app pub date -
Sep 18, 2006
filing date -
Sep 18, 2006
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Abstract
A dissolved oxygen measurement system, and a method for calibrating a dissolved oxygen analyzer are provided. The method includes directing a pressurized cleaning fluid, having a known oxygen content, upon a sensing surface of a dissolved oxygen sensor disposed in a fluid. Then, the analyzer waits until the dissolved oxygen sensor response to the pressurized cleaning fluid is relatively stable, and stores a calibration value relative to the dissolved oxygen sensor response to the pressurized cleaning fluid. A dissolved oxygen measurement system is also provided. The system includes a dissolved oxygen sensor disposed in a fluid and a first source of a first compressed cleaning fluid that has a first dissolved oxygen content. A dissolved oxygen analyzer is coupled to the dissolved oxygen sensor and to the first valve and is configured to obtain a first calibration value related to the first dissolved oxygen content.
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