Hach DR/850 - Page 208

208
5.
Press:
TIMER ENTER
A three-minute reaction
period will begin.
Note: Continue with
Steps 6 to 8 while the
timer is running.
6. Fill a second sample
cell with 10 mL of
sample (the blank).
7. Place the blank in the
cell holder. Tightly
cover the sample cell
with the instrument cap.
Note: Press EXIT to zero
the instrument while the
timer is running.
Press: ZERO
The cursor will move
to the right, then the
display will show:
0.00 mg/L Fe
If Reagent Blank
Correction is on, the
display may flash
“limit”. See Section 1.
8.
After the timer beeps,
place the prepared
sample in the cell holder.
Tightly cover the sample
cell with the
instrument cap.
9. Press: READ
The cursor will move to
the right, then the result
in mg/L iron will be
displayed.
Note: Standard Adjust may
be performed using a
prepared standard (see
Section 1).
IRON, TOTAL, continued