Hach DR/850 - Page 197

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5.
Press: ZERO
The cursor will move to
the right, then the
display will show:
0.00 mg/L Fe
6. Fill a FerroVer
AccuVac Ampul
with sample.
Note: Keep the tip
immersed while the ampul
fills completely.
7. Quickly invert the
ampul several times to
mix. Wipe off any liquid
or fingerprints.
Note: An orange color will
form if iron is present.
Note: Accuracy is not
affected by undissolved
powder.
8. Press:
TIMER ENTER
A three-minute reaction
period will begin.
Note: Samples containing
visible rust should be
allowed to react at least
five minutes.
9. Place the AccuVac
ampul into the cell
holder. Tightly cover the
ampul with the
instrument cap.
10. Press: READ
The cursor will move to
the right, then the result
in mg/L iron (Fe) will
be displayed.
Note: Standard Adjust may
be performed using a
prepared standard (see
Section 1).
IRON, TOTAL, continued