Hanna-instruments HI 83214 Instrukcja Użytkownika Pobierz pdf (Strona 48)

COD HR

• Select the

Oxygen Demand, (COD) HR

method following one of the procedures described in the

“Method Selection” section (see page 15).

• Place the blank vial into the holder and push it completely down.

• Press the Zero key. The instrument will perform a zero sequence and after a few seconds the display

will show “-0.0-”. Now the meter is zeroed and ready for measurement.

• Remove the blank vial.

• Place the sample vial into the holder and push it completely down.

• Press Read. The instrument will perform the reading.

• The instrument directly displays concentration in mg/L of oxygen demand.

INTERFERENCES

Interference may be caused by:

Chloride (Cl

) above 20000 mg/L.

Samples with higher chloride concentration should be diluted.

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Hanna-instruments HI 83214 Instrukcja Użytkownika Strona 48