Water Quality Meter

Operation

1. Remove the protective cap and protective film on the screen.
2. First rinse the electrode with distilled water, and suck it with filter paper.
3. Turn the meter on by pressing the “ON/OFF” key.
4. Immerse the pH meter electrode in the solution to be tested (cannot be over the immersion line)
5. Stir gently and wait around 30 seconds till the reading is stabilized.
6. After finished clear the electrode with pure water, turn the meter off by pressing the “ON/OFF” key.
7. Always replace the protective cap after use.

Calibration

1. Turn on the pH meter
2. Dissolve each buffer solution in 250 ml of distilled water
3. Immerse the electrode into the pH 6.86 solution. (At 25⁰c)
4. Press the “CAL” (calibration) button for 5 seconds and release.

• Display will start flashing 6.86
• Wait until the display stops flashing.

Rinse the electrode with distilled water and dry it with filter paper.