Hach DR/700 Procedures Manual page 627

OXYGEN DEMAND, CHEMICAL,
COLORIMETRIC DETERMINATION, 0 to 1,500 and
0 to 15,000 mg/L COD
1.
Install module
61.01
in a DR/700.
4.
Fully insert a
COD Vial Adapter
into the cell holder
with the tabs in the
square slot.
2.
Press:
I/O
The display will show
610 nm
and module number
61.01
5.
Clean the outside
of the blank with a
towel.
Note: Wiping with a
damp towel followed by
a dry one will remove
fingerprints or other
marks.
61-71
continued
3.
After 2 seconds,
the display will show
a program number,
the concentration
units and the zero
prompt. If necessary,
press the
UP ARROW
key until the lower
display shows
program number
61.08.1
6.
Place the blank
into the adaptor with
the Hach logo facing
the front of the
instrument.
Note: Avoid bright light
when making
measurements.