A Digital pH Tester Pen for Water How to Use? Step 1: Remove the protective cap Step 2: Clean the electrode in distilled water and let it dry Step 3: Turn the meter on by pressing the ON/OFF key Step 4: Immerse the pH meter electrode in the solution you want to test Step 5: Stir gently and wait for the displayed pH to stabilize Step 6: After finishing, clean the electrode in distilled water and turn the meter off by pressing the ON/OFF key Instructions for use of PH calibration powder: Calibration powder:pH standard solid substance. It can be used after adding water. Suitable for calibrating any type of ph meter. Each package needs to prepare 250ML of purified water.
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