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Note: It is possible to interrupt calibration procedure at any time by pressing CAL CHECK
or ON/OFF.
Warning: Do not calibrate the instrument with standard solutions other than the HANNA
CAL CHECK™ Standards, otherwise erroneous results will be obtained. For accurate Validation and
Calibration results, please perform test at room temperature: 18 to 25°C (64.5 to 77.0°F)
• Turn the meter on by pressing ON/OFF.
• When the beeper sounds and the LCD
displays dashes, the meter is ready.
• Enter the calibration mode by holding CAL
CHECK for three seconds. The display will
show “CAL” during calibration.
• Place the CAL CHECK™ Standard
Cuvet A into the cuvet holder. Ensure that
the notch on the cap is positioned securely
into the groove.
• Press ZERO/CFM and the instrument status
indicator will appear, depending on the
measurement phase.
CALIBRATION PROCEDURE