Glassware Burets Flasks, Beakers, & Graduated Cylinders Pipets Repipets Volumetric Flasks Instruments Analytical Balance pH Meter: Analog pH Meter: Digital Spectrometer: Analog Spectrometer: Digital Spectrometer: Scanning Top-loading Balance Techniques Calorimetry Centrifugation Quantitative Transfer Titration Vacuum Filtration ChemLab Home		pH Meter A pH meter uses an electrode to measure the pH of a solution. Move your cursor over the image for information about the instrument. Having trouble viewing the image? Help is here. Calibrating a pH Meter Remove bottle with storage solution, rinse electrode, blot dry. Measure pH of 4 buffer, which is pink. Adjust meter to read 4 with Cal 1 knob on left. Remove pH 4 buffer, rinse electrode, blot dry. Measure pH of 10 buffer, which is blue. Adjust meter to read 10 with Cal 2 knob on right. Remove pH 10 buffer, rinse electrode, blot dry. Measure pH of 4 buffer again. pH should read 4. If not, readjust Cal 1 knob. Return to pH 10 buffer. pH should read 10. If not, readjust Cal 2 knob. Repeat the standardization using the Cal 1 knob with the pH 4 buffer and the Cal 2 know with the pH 10 buffer until consistent readings are obtained.
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