High Precision ORP/Redox Tester Waterproof ORP Meter Tester Potential Positive and Negative
Remove the prrotective cap.
Turn the meter on by pressing the ON key.
immerse the electrode in the solution to be tested.
Stir gently and wait for the reading to stabilize.
Press the "HOLD" key, the reading is be kept. when repeat measuring, please press the "HOLD" key again, it automatacally relieves the hold condition.
After use, turn the meter on by pressing the OFF key. rinse the electrode with distilled water to minimize contamination. replace the protective cap after use.
notes: it is waterproof design, with replaceable electrode.
Immerse the meter in the distilled water. Activate it after a few hours.
Immerse the meter in the calibration solution. and stir it gently.
Regulate the trimmer with a screwdriver until LCD screen for 265mV.
Rinse the electrode with distilled water, and suck it with filter paper.