Hach DR/700 Procedures Manual page 612

NITROGEN, MONOCHLORAMINE,
13.
Place the
AccuVac Adapter in
the cell holder.
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.
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.
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.
61-56
continued
15.
Press:
READ
The display will
count down to 0.
Then the display will
show the
monochloramine
results in mg/L NH
as N.
Note: To convert results
to other units, see
Table 1.
18.
Press:
READ
The display will
count down to 0.
Then the display will
show the free
ammonia result in
mg/L NH as N.
3
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.
3