Hach DR/850 - Page 179

179
5.
Cap and quickly
invert the ampules
several times to mix.
Wipe off any liquid or
fingerprints.
6. Press:
TIMER ENTER
A one-minute reaction
period will begin.
7. After the timer beeps
place the blank into the
cell holder. Tightly
cover the ampule with
the instrument cap.
8. Press: ZERO
The cursor will move to
the right, then the
display will show:
0.0 mg/L F
9. Place the AccuVac
Ampul containing the
sample into the
instrument. Tightly
cover the sample cell
with the instrument cap.
10. Press: READ
The cursor will move to
the right, then the result
in mg/L fluoride will be
displayed.
Note: Use of the Standard
Adjust feature with each
new lot of reagent is highly
recommended. See
Accuracy Check following
these steps.
FLUORIDE, continued