Hach DR/700 - Page 612

61-56
NITROGEN, MONOCHLORAMINE, continued
13. Place the
AccuVac Adapter in
the cell holder.
14. Place the ampul
filled from the beaker
labeled
monochloramine into
the cell holder.
Note: In bright light it
may be necessary to
close the cell
compartment cover.
15. Press: READ
The display will
count down to 0.
Then the display will
show the
monochloramine
results in mg/L NH
3
as N.
Note: To convert results
to other units, see
Table 1.
16. Leave the
monochloramine
ampul in the cell
holder. Press
ZERO
twice.
The display will show
0.00 mg/l
and the zero prompt
will turn off.
17. Place the ampul
labeled free ammonia
into the cell holder.
Note: In bright light it
may be necessary to
close the cell
compartment cover.
18. Press: READ
The display will
count down to 0.
Then the display will
show the free
ammonia result in
mg/L NH
3
as N.
Note: To convert results
to other units, see
Table 1.
Note: For best results,
test monochloramine-free
water and subtract the
value you obtained (or
subtract 0.01 mg/L) from
the displayed value.