ChemLab: Techniques



Flasks, Beakers, & Graduated Cylinders



Volumetric Flasks


Analytical Balance

pH Meter: Analog

pH Meter: Digital

Spectrometer: Analog

Spectrometer: Digital

Spectrometer: Scanning

Top-loading Balance




Quantitative Transfer


Vacuum Filtration

ChemLab Home

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.

Dartmouth College
Trustees of Dartmouth College, Copyright 1997–2000