Hach DR/700 Procedures Manual page 617

OXYGEN, DISSOLVED, LR
For boiler feedwater
Indigo Carmine Method (Using AccuVac Ampuls)
1.
Install module
61.01
in a DR/700.
Note: Samples must be
analyzed on site and
cannot be stored; see
Sampling and Storage
following this
procedure.
4.
Fill a cell with
10 mL of sample (the
blank). Cap. Fill a
blue ampul cap with
sample. Collect at
least 40 mL of sample
in a 50-mL beaker.
AccuVac is a Hach Company trademark.
2.
Press:
I/O
The display will show
610 nm
and module number
61.01
5.
Place the blank in
the cell holder.
Note: In bright light it
may be necessary to
close the cell
compartment cover.
61-61
Method 8316
(0 to 1000 µg/L O
3.
After 2 seconds,
the display will show
a program number,
concentration units,
decimal position and
the zero prompt. If
necessary, press the
key
UP ARROW
until the lower
display shows
program number
61.07.1
6.
Press:
ZERO
The display will
count down to 0.
Then the display will
show 0.00 µg/L and
the zero prompt will
turn off.
)
2