Hach DR/850 - Page 190

190
9.
Place the prepared
sample into the cell
holder. 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 ferrous iron will
be displayed.
Note: Standard Adjust may
be performed using a
prepared standard (see
Section 1).
Using AccuVac Ampuls
1.
Enter the stored
program number for
ferrous iron (Fe
2+
)
AccuVac ampuls.
Press:
PRGM
The display will show:
PRGM ?
Note: Analyze samples as
soon as possible to prevent
air oxidation of ferrous iron
to ferric, which is not
determined.
2. Press: 33 ENTER
The display will show
mg/L, Fe and the
ZERO icon.
3. Fill a sample cell
with at least 10 mL of
sample (the blank).
Collect at least 40 mL of
sample in a 50-mL
beaker.
4. Place the blank into
the cell holder. Tightly
cover the sample cell
with the instrument cap.
IRON, FERROUS, continued