Hach DR/700 - Page 206

45-34
PHENOLS, continued
13. Install module
45.01
in a DR/700.
14. Press: I/O
The display will show
450 nm
and module number
45.01
15. 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
45.05.1
16. Place the blank in
the cell holder.
Note: Typical indoor
lighting permits the
DR/700 to operate with
the cell compartment
cover open. In bright
light, it may be necessary
to close the cell
compartment cover.
Transfer 10 mL of the
blank solution to a
10-mL cell. If the 10-mL
cell is used for the blank,
another 10-mL cell must
be used for the sample.
17. Press: ZERO
The display will
count down to 0.
Then the display will
show 0.000 mg/L.
18. Place the
prepared sample in the
cell holder.
Note: Typical indoor
lighting permits the
DR/700 to operate with
the cell compartment
cover open. In bright
light, it may be necessary
to close the cell
compartment cover.
Transfer 10 mL of the
sample solution to a
10-mL cell. If the 10-mL
cell is used for the blank,
another 10-mL cell must
be used for the sample.