Hach DR/700 Procedures Manual page 471

COPPER,
continued
2 minutes
7.
Wait 2 minutes.
10.
Insert the
AccuVac Vial
Adapter into the cell
holder.
8.
Place the blank in
the cell holder.
Note: In bright light it
may be necessary to
close the cell
compartment cover.
11.
Place the
prepared sample in
the cell holder.
Note: In bright light it
may be necessary to
close the cell
compartment cover.
55-23
9.
Press:
ZERO
The display will
count down to 0.
Then the display will
show 0.00 mg/L and
the zero prompt will
turn off.
12.
Press: READ
The display will
count down to 0.
Then the display will
show the results in
mg/L copper.
Note: Determine a
reagent blank for each
new lot of ampuls.
Repeat Steps 4 to 11
using demineralized
water as the sample.
Subtract this value from
each result obtained
with this lot of ampuls.