TWW Digital PH Meter
Operating Instructions
1. Remove the protective cap.
2. Rinse the electrode with distilled water.
3. Turn the meter on by pressing the ON/OFF key.
4. Dip the pH meter electrode into the test solution. (glass probe should be completely submerged)
5 Stir gently and wait approximately 30 seconds for reading to stabilize.
6 After use, rinse the prob tip with distilled water and replace the protective cap.
Calibration Instructions.
1. Dissolve each packet into 250ml (~8.453 oz) of distilled water. For the most accurate calibration, each calibration solution should be at 25C (77F).
2.Turn on pH meter.
3. Dip electrode into the pH 6.86 solution.
- Press and hold "CAL" (calibration) button for 5 seconds and release.
- The display will be flashing 6.86.
- When display stops flashing rinse with distilled water
4. Dip electrode into the pH 4.00 solution.
- Press and hold "CAL" (calibration) button for 5 seconds and release. Then immediately after releasing press the CAL button ONE more time.
- The display will be flashing 4.00.
- When display stops flashing rinse with distilled water
5. Dip electrode into the pH 9.18 solution.
- Press and hold "CAL" (calibration) button for 5 seconds and release. Then immediately after releasing press the CAL button TWO more times.
- The display will be flashing 9.18.
- When display stops flashing rinse with distilled water
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