Hach DR/700 Procedures Manual page 609

NITROGEN, MONOCHLORAMINE,
13.
Leave the
monochloramine cell
in the cell holder.
Press twice.
ZERO
The display will show
0.00 mg/l
and the zero prompt
will turn off.
14.
Place the cell
labeled free ammonia
into the cell holder.
Note: In bright light it
may be necessary to
close the cell
compartment cover.
Table 1. Conversion Factors
To convert reading from
mg/L NH -N
3
mg/L NH -N
3
mg/L NH Cl-N
2
mg/L NH Cl-N
2
61-53
continued
15.
Press:
READ
The display will
count down to 0.
Then the display will
show the free
ammonia result in
mg/L nitrogen
(NH -N).
3
Note: To convert results
to other units, see Table
1.
To Multiply by
mg/L NH 1.29
+
4
mg/L NH 1.22
3
mg/L NH Cl as Cl 5.06
2 2
mg/L NH Cl 3.67
2