Hach POCKET COLORIMETER II - Page 70

1—70
pH, continued
1.Collect about 50 mL of
sample in a beaker and fill a
10-mL sample cell to the
10-mL mark with sample.
2.Press the POWER key to
turn the meter on.
The arrow should indicate
pH.
Note:
See page 2—4 for
information on selecting the
correct range channel.
3.Using the calibrated
dropper, add 0.5 mL of
Phenol Red Solution to the
cell. Cap and invert to mix.
Note:
For greatest accuracy,
use a clean and dry dropper.