Hanna-instruments HI 83214 Manual do Utilizador descarregar pdf (Página 42)

• Select

Oxygen Demand, (COD) LR

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 displays concentration in mg/L of oxygen demand.

INTERFERENCES

Interference may be caused by:

Chloride (Cl

) above 2000 mg/L.

Samples with higher chloride concentration should be diluted.

COD LR

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Hanna-instruments HI 83214 Manual do Utilizador Página 42