Hach DR/700 - Page 699

81-25
Method 8048
PHOSPHORUS, REACTIVE (0 to 5.00 mg/L)
For water, wastewater and seawater
PhosVer 3 Method; Test ’N Tube
™ Procedure
1. Install module
81.01
in a DR/700
Note: Refer to
Calibration following
these steps.
2. Press: I/O
The display will show
810 nm
and module
81.01
3. After 2 seconds,
the display will show
a program number,
the concentration
units and the zero
prompt. Press the
PROGRAM key until
the lower display
shows program
number
81.000
The upper display
will show the S1
concentration.
Note: Clean glassware
with 1:1 hydrochloric
acid solution. Rinse
again with
demineralized water.
Do not use phosphate
detergents to clean
glassware.