Hach POCKET COLORIMETER II Instruction Manual page 27

7.
For free chlorine, wipe
excess liquid and
fingerprints from the
AccuVac Ampule. Put the
ampule in the cell holder,
then cover with the
instrument cap. Proceed to
step 9 within one minute
after filling the AccuVac
Ampule.
Note:
If the sample temporarily turns yellow after reagent addition, or if the display shows
overrange (page 2—12) dilute a fresh sample and repeat the test. A slight loss of chlorine
may occur because of the dilution. Multiply the result by the appropriate dilution factor.
Chlorine, Free and Total, LR,
8.
For total chlorine, wait
3 to 6 minutes after filling
the AccuVac Ampule. After
the reaction time, wipe
excess liquid and
fingerprints from the
ampule. Put the ampule in
the cell holder, then cover
with the instrument cap.
Proceed to step 9.
1—27
continued
9.
Press READ/ENTER
The instrument will show
- - - - followed by the results
in mg/L chlorine.
.