SOP (Standard Operating Procedure) of pH Meter

 SOP of pH Meter

1. Ensure that the instrument is on clean and dry platform
2. Ensure that the instrument is clean.
3. Switch on the main power supply to the instrument that reads. “ Name of the instrument pH meter”
4. Press mode, it will display “pH mode- Press ENTER OR Mode”. Press ENTER to enter the pH mode.
5. Ensure that the instrument is calibrated (If the instrument is calibrated the display shows. “I” on the right side of the display and If the instrument is not calibrated, the display shows “N” on the right side of the display)
6. Remove the pH electrode from the storage solution and rinse it with purified water 2-3 times. Soak the excess water with tissue paper and insert the pH electrode and temperature sensor in the same beaker.
7. Stir the solution keeping the pH electrode and resistant temperature sensor immersed.
8. Allow stabilizing the pH and record the pH. The display shows the pH of the sample, temperature °C, mV, and Calibration status as “I”.
9. Press ENTER to take print of the observation.
10. Select the start mode by pressing “.” Key.
11. If it is in standard mode the display will show.
12. After completion of pH measurement rinse the pH electrode and temperature sensor with purified water, Soak the excess water and insert the pH electrode, and temperature the sensor in storage solution (Buffer of pH 7 having 1gm potassium chloride in 100ml of water).
13. After the measurement enter details in the usage logbook and switch down the power.

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