HOW TO TEST
- Press the ON/OFF button to turn the checker on. All segments will be displayed for a few seconds, followed by “Add”, “C.1” with “Press” blinking.
- Fill the cuvette with 10 mL of unreacted sample and replace the cap. Insert the cuvette into the checker and close the cap
- Press the ON/OFF button. When the display shows “Add”, “C.2” with “Press” blinking, the checker is zeroed
- Remove the cuvette. Unscrew the cap and add 5 drops of HI780-25 pH reagent indicator. Replace the cap and invert 5 times to mix
- Insert the cuvette into the checker and press the ON/OFF button. The instrument displays the result in pH. The checker automatically turns off 10 minutes after reading


