Using the pH Meter

Calibration of the Meters with pH 7 and pH 2 Buffers

1. Select the pH Mode and set the temperature control knob to 25°C. Adjust the cal 2 knob to read 100%.

2. Rinse the electrode with deionized water and blot dry using a piece of tissue (Shurwipes or Kimwipes are available in the labs).

3. Place the electrode in the solution of pH 7 buffer, allow the display to stabilize and, then, set the display to read 7 by adjusting cal 1. Remove the electrode from the buffer.

4. Rinse the electrode with deionized water and blot dry using a piece of tissue (Shurwipes or Kimwipes are available in the labs).

5. Place the electrode in the solution of pH 2 buffer, allow the display to stabilize and, then, set the display to read 2 by adjusting cal 2. Remove the electrode from the buffer.

6. Rinse the electrode with deionized water and blot dry using a piece of tissue (Shurwipes or Kimwipes, as before).

NOTE - Buffer solution are made available to you in individually labeled 2 oz. bottles. The buffers are to be used in these containers, only! Do not pour them into other containers at any time. After use, cap the bottles so that the buffers can be re-used.

Alternate Buffer Combinations

Measuring pH

1. Make sure that the meter is set to the pH Mode and adjust the temperature to 25°C.

2. Place the electrode in the sample to be tested.

3. The pH of the solution appears in the display.

NOTE: Allow the display to stabilize before taking your reading!

4. Rinse the pH electrode and place it back in the storage solution.

pH Meter Menu