Hach DR/700 - Page 609

61-53
NITROGEN, MONOCHLORAMINE, continued
13. Leave the
monochloramine cell
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 cell
labeled free ammonia
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 free
ammonia result in
mg/L nitrogen
(NH
3
-N).
Note: To convert results
to other units, see Table
1.
Table 1. Conversion Factors
To convert reading from To Multiply by
mg/L NH
3
-N mg/L NH
4
+
1.29
mg/L NH
3
-N mg/L NH
3
1.22
mg/L NH
2
Cl-N mg/L NH
2
Cl as Cl
2
5.06
mg/L NH
2
Cl-N mg/L NH
2
Cl 3.67