Hach DR/700 - Page 280

50-30
NITRATE, HR, continued
7. Wait 5 minutes.
Note: A deposit of
unoxidized metal will
remain after the
NitraVer 5 Nitrate
Reagent Powder
dissolves. The deposit
will not affect test
results.
Note: An amber color
will develop if nitrate
nitrogen is present.
8. Place the blank in
the cell holder.
Note: In bright sunlight
it may be necessary to
close the cell
compartment cover.
9. Press: ZERO
The display will
count down to 0.
Then the display will
show 0.0 mg/L and
the zero prompt will
turn off.
5 minutes