Oxygen Demand, Chemical
Oxygen Demand, Chemical
OxygenCOD_None_Mid_RCD_Eng_Ody.fm Page 3 of 8
1. Touch
Hach Programs.
Select program
430 COD LR (Low Range)
or
435 COD HR (High
Range/High Range Plus).
Touch
Start.
2. Clean the outside of
the vials with a damp
towel followed by a dry
one to remove
fingerprints or other
marks.
3. Install the 16-mm
adapter.
Note: See Section 2.6 in the
Instrument Manual for
installation details.
Place the blank into the
adapter.
4. Touch Zero.
The display will show:
0 mg/L COD
5. When the timer
beeps, place the sample
vial into the adapter.
Touch
Read.
Results will appear in
mg/L COD.
6. If using High Range
Plus COD Digestion
Reagent Vials, multiply
the result by 10.
Note: For most accurate
results with samples near
1,500 or 15,000 mg/L COD,
repeat the analysis with a
diluted sample.
Colorimetric Determination Method 8000
Hach Programs
Zero
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