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pH Meter: Analog

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Digital pH Meter

A Digital pH meter uses an electrode to measure the pH of a solution.

Calibrating a Digital pH Meter
Image 1
Press the mode button to select pH.
Image 2
Press the Setup button twice, then press the Enter button to clear the existing standardization
Image 3
Press the STD button to begin the new calibration.
Image 4
Remove the electrode from the bottle of storage solution. Rinse with distilled water.
Image 5
Emerse the electrode in pH 4 buffer, which is pink. Swirl the solution to fully saturate the electrode with buffer.
Image 3
Press the STD button again. After the reading is stable, the meter will return to the Measure screen. Press the STD button again to calibrate with a second buffer solution
Image 4
Remove the solution from the pH 4 buffer and rinse the electrode
Image 6
Emerse the electrode in the pH 10 buffer and swirl. Press STD again to calibrate with this buffer. The meter will display a calibration slope and return to the Measure screen.

Now the meter should be calibrated and ready to use for measuring the pH of any solution.

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