Hach DR/700 - Page 119

42-35
mg/L NH
3
-
N mg/L NH
3
1.22
mg/L NH
3
-
N mg/L NH
4
+
1.29
NITROGEN, AMMONIA, continued
10. Place the blank
in the cell holder.
Note: Typical indoor
lighting permits the
DR/700 to operate with
the cell compartment
cover open. In bright
sunlight, it may be
necessary to close the
cell compartment cover.
Transfer 10-mL of the
blank solution to a 10-
mL cell. If the
10-mL cell is used for
the blank, another
10-mL cell must be used
for the sample.
11. Press: ZERO
The display will count
down to 0. Then the
display will show 0.00
mg/L and the zero
prompt will turn off.
12. Place the
prepared sample in
the cell holder.
Note: Typical indoor
lighting permits the
DR/700 to operate with
the cell compartment
cover open. In bright
sunlight, it may be
necessary to close the
cell compartment cover.
Transfer 10-mL of the
prepared sample to a
10-mL cell. If the 10-
mL cell is used for the
blank, another
10-mL cell must be used
for the sample.
13. Press: READ
The display will
count down to 0.
Then the display will
show the results in
mg/L ammonia
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