Hach DR/700 - Page 435

52-109
PHOSPHORUS REACTIVE, continued
10. 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.
11. Fill a 10-mL cell
to the 10-mL line
with prepared
sample.
12. Place the
prepared sample in
the cell holder.
Note: In bright sunlight,
it may be necessary to
close the cell
compartment cover.
13. Press: READ
The display will
count down to 0.
Then the display will
show the results in
mg/L phosphate
(PO
4
3-
).
Note: To convert results
to other units, see Table
1.
Table 1. Conversion Factors
To convert results from To Multiply by
mg/L PO
4
3-
mg/L P
2
O
5
0.747
mg/L PO
4
3-
mg/L P 0.326