Hach DR/700 - Page 433

52-107
Method 8178
PHOSPHORUS, REACTIVE (0 to 30.00 mg/L PO
4
3-
)
For water, wastewater, seawater
(Also called Orthophosphate) Amino Acid Method*
1. Install module
number
52.01
in a DR/700.
Note: If samples cannot
be analyzed
immediately, see
Sampling and Storage
following these steps.
2. Press: I/O
The display will show
525 nm
and module number
52.01
3. After 2 seconds,
the display will show
a program number,
the concentration
units, decimal
position and the zero
prompt. If necessary,
press the
UP ARROW
key until the lower
display shows
program number
52.15.1
*Adapted from Standard Methods for the Examination of Water and Wastewater.