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Philip JohnsonAug 15, 2025
What to do if Hanna Instruments Measuring Instruments display shows "p H" and "-2.00" or "16.00" blinking?
- KKristin HernandezAug 15, 2025
If your Hanna Instruments Measuring Instruments display shows "p H" and "-2.00" or "16.00" blinking, it indicates that the reading is out of range in the pH scale. You should: * Verify the electrode is connected. * Ensure the shipping cap has been removed. * Recalibrate the meter. * Confirm the pH sample is within the specified range. * Check the electrolyte level and the general condition of the electrode.