pH Meter Pen

Range: 0.0 to 14.0 pH

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OPERATION

1. Remove the protective cap. Do not be alarmed if white crystals appear around the cap. This is normal with pH electrodes and they dissolve when rinsed with water.
2. Turn the meter on by sliding the switch on top.
3. Immerse into solution up to the max immersion level. Stir gently and wait until the display stabilizes. Readings are automatically compensated for temperature variations.  

After use, switch off pH meter, use the water to clean the electrode and replace the protective cap. Large fluctuations in readings could be due to lack of calibration, dry electrode or rundown batteries. 

CALIBRATION

• Immerse the tester up to the maximum immersion level in pH 7.00 buffer solution.
• Allow the reading to stabilize and using a small screwdriver adjust the calibration trimmer to read 7.0. Calibration will then be complete. Always use fresh buffers for calibration.