Hanna Instruments HI 96706C - Manual (Page 15)

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Alternatively, wait for 5 minutes and just
press READ/ /TIMER.
In both cases, the lamp, cuvette and
detector icons will appear on the display,
depending on the measurement phase.
• At the end of measurement, the
instrument directly displays concentration
in mg/L of phosphorus on the LCD.
INTERFERENCES
Calcium (Ca
2+ ): above 10,000 mg/L as CaCO
3
Chloride (Cl¯): above 150,000 mg/L as Cl¯
Ferrous iron (Fe 2+ ): above 100 mg/L as Fe 2+
Magnesium (Mg 2+ ): above 40,000 mg/L as CaCO
3
Sulfide (S 2 ¯)
VALIDATION PROCEDURE
Use the validation procedure to ensure that the instrument is properly calibrated.
Warning:
Do not validate the instrument with any standard solutions other than the HANNA CAL
CHECK TM Standards, otherwise erroneous results will be obtained.
• Turn the meter on by pressing ON/OFF.
• When the beeper sounds briefly and the
LCD displays dashes, the meter is ready.
• Place the CAL CHECK TM Standard
HI 96706-11 Cuvette A into the cuvette
holder and ensure that the notch on the
cap is positioned securely into the groove.