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pH CALIBRATION
• Press CAL. The instrument will display the measured pH, the LCD first expected buffer and the
temperature reading.
• If necessary, press the / keys to select a different buffer value.
• The “ ” tag will blink on the LCD until the reading is stable.
• When the reading is stable and within range of the selected buffer, CFM functional key is
displayed.
FIVE POINT CALIBRATION
• Immerse the pH electrode approximately 4 cm (1½”) into a buffer solution of your choice
(pH 1.68, 4.01, 6.86, 7.01, 9.18, 10.01, 12.45 or a custom buffer) and stir gently.
• Press CFM to confirm first point.
• The calibrated value and the second expected buffer value is then displayed on the LCD.
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