Hach DR/700 Procedures Manual page 311

POLYACRYLIC ACID,
COLORIMETRIC ANALYSIS
1.
Install module
number
50.01
in a DR/700.
4.
Pipet exactly
1.00 mL of
Polyacrylic Acid 1
Reagent into each
mixing cylinder.
Stopper and invert to
mix. Proceed
immediately to Step 5.
Note: Use a volumetric
pipet or TenSette Pipet
to measure this volume.
continued
2.
Press:
I/O
The display will show
500 nm and module
number
50.01
5 minutes
5.
Wait 5 minutes.
50-61
3.
After 2 seconds,
the display will show
a program number,
the concentration
units, decimal
position and the zero
prompt. If necessary,
press the
UP ARROW
key until the lower
display shows
program number
50.10.1
for LMW-20 or
50.11.1
for LMW-45
6.
Add exactly
1.0 mL of Polyacrylic
Acid 2 Reagent to
each cylinder. Stopper
and invert to mix.
Proceed rapidly
through Steps 7 and 8.
Note: Use a volumetric
pipet or TenSette pipet
to measure this volume.