Prior to Use
1.1 Connect the pH electrode to the meter (refer to the Connection
section on page 6).
1.2 Remove the protective cap from the bottom of the electrode. If
tiny air bubbles are present inside the pH-sensitive glass
membrane, gently shake the electrode downward to remove air
bubbles.
Preparation of pH Buffer Solutions
The 9 series meter is packaged with the pH 4.01, 7.00, 10.01 buffer
sachets required for calibration.
2.1 Half fill a 250 ml volumetric flask with distilled water and add
the pH 7.00 buffer reagent.
2.2 Swirl the volumetric flask gently to dissolve the reagent and fill
to the mark with distilled water.
2.3 Cap and upend the volumetric flask several times to mix the
solution.
• Preparation of pH 4.01 and 10.01 buffer solutions are the same
as above.
• Prepared buffer solution should be stored in hermetically sealed
glass container and avoid direct sunlight.
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