Hach DR/700 - Page 240

48-4
LEAD, continued
10. Using a 1-mL
plastic dropper, add
1.0 mL of pPb-4
Neutralizer Solution
to the sample cell.
Cap and invert several
times to mix.
Proceed quickly to
the next step.
11. Add the
contents of one pPb-5
Indicator Powder
Pillow to the sample.
Cap and invert several
times to mix.
Note: The solution will
turn brown.
12. Wait 2 minutes.
13. Install module
48.01
in a DR/700.
14. Press: I/O
The display will show
480 nm
and module number
48.01
15. After 2 seconds,
the display will show
a program number,
concentration units,
decimal position and
the zero prompt. If
necessary press the
UP ARROW key until
the lower display
shows program
number
48.02.1
2 minutes