Hach DR/700 - Page 744

81-70
SUSPENDED SOLIDS, continued
7. Fill a 25-mL cell
to the 25-mL line
with tap or
demineralized water
(the blank).
Note: Remove gas
bubbles in the tap water
by swirling or tapping
the bottom of the cell on
a table top.
8. Place the blank in
the cell holder.
Note: Use 10-mL cells
for the blank and the
prepared sample in
bright sunlight. Close
the cell compartment
cover.
9. Press: ZERO
The display will
count down to 0.
Then the display will
show 0.00 mg/L and
the zero prompt will
turn off.