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Error message on pH Pro (2100A)
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Last Updated
10th of January, 2012

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Indicates calibration error. This can be due to:

-No standard solution on the sensor

-Bubbles on the surface of the ISFET sensor chip

-No connection between the ISFET sensor chip and the liquid junction by means of the standard solution

-Reference electrode not properly set in the pH meter

-Reference electrode service life is over.

-Corrosion on Circuit Board

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