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• Turn the meter on by pressing ON/OFF.
• Press ZERO/CFM and the instrument status
indicator icons will appear, depending on
the measurement phase.
• Place the CAL CHECK
™ ™
™ ™
™
Standard
Cuvet A into the cuvet holder and ensure
that the notch on the cap is positioned
securely into the groove.
• When the beeper sounds and the LCD
displays dashes, the meter is ready.
INTERFERENCES
• Iron (Fe
2+
and Fe
3+
) interferes at high levels.
• Sulfide (S
2-
) interferes at high levels.
• Phosphates does not interfere up to 50 mg/L PO
4
3-
.
VALIDATION PROCEDURE
Use the validation procedure to ensure that the instrument is properly calibrated.
Warning: do not validate or 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)