Monitoring method
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United States of America Patent
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Sep 15, 2015
Grant Date -
Dec 12, 2013
app pub date -
Jan 11, 2012
filing date -
Jan 26, 2011
priority date (Note) -
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Abstract
A method for monitoring the effectiveness of an ion exchange module in an ultrapure water purification circuit containing ultrapurified water and having a purified water inlet and a point of use outlet and a memory, the method including the steps of measuring the resistivity of ultrapurified water using one or more sensors to provide an ultrapurified benchmark resistivity value Ri; introducing purified water into the circuit and passing the water through the ion exchange module; measuring the resistivity of the water to provide a new water resistivity value Rnew; and comparing Ri and Rnew to determine the effectiveness of the ion exchange module.
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