
99
COD MR
• Select the
Oxygen Demand, Chemical
MR (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
on the LCD.
INTERFERENCES
Interference may be caused by:
Chloride (Cl¯) above 2000 mg/L.
Samples with higher chloride concentration should be diluted.