Hach DR/850 - Page 171

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5.
Quickly invert the
ampules several times to
mix. Wipe off any
liquid or fingerprints.
Note: Do not place finger
over the broken tip- the
liquid will remain in
the ampul.
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