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.