Suitable for Various Occasions:
✔ Turn on the pH meter
✔ Dissolve each buffer solution in 250 ml of distilled water
✔ Immerse the electrode into the pH 6.86 solution.(under the temperature of 25℃)
✔ Press the “CAL”(calibration) button for 5 seconds and release
- Display screen will start flashing “6.86”
- Wait it until the display screen stops flashing.
- Rinse the electrode with distilled water and make it dry with filter paper.
✔ Repeat the above steps with 4.01 pH buffer powder and 9.18 pH buffer powder.