102
• Select
Oxygen Demand, Chemical LR
(COD)
method following one of the
procedures described in the
Method
Selection
section (see page 12).
• Place the COD vial adapter in the
cuvet holder and ensure that the
adapter is well fit inside.
• Place the blank vial into the holder and push it completely down.
• Press the Zero key and the instrument will perform a zero sequence. If the zero sequence was
successfully done, 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 and 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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