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Cardy Twin pH Meter is giving no (or incorrect) reading (2103)
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Last Updated
10th of January, 2012

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- Inspect sensor in bright light for cracks or flaws.

- Place 4.0 standard solution on sensor and attempt reading.  Failed sensors generally cannot calibrate to the pH 4 solution. If so replace sensor.

- Condition sensor.  Cover sensor with either standard solution and soak for 15 minutes.  Rinse and attempt calibration.

- Make sure the drop covers the electrode and reference junction, or else sensor may be worn out.


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