Hach DR/700 - Page 225

45-53
Method 8051
SULFATE (0 to 100 mg/L SO
4
2-
)
For water, wastewater and seawater
SulfaVer 4 Method*‡ (Powder Pillows or AccuVac Ampuls),
USEPA accepted for reporting**
USING POWDER PILLOWS
1. Install module
45.01
in a DR/700.
Note: If samples cannot
be analyzed
immediately, see
Sampling and Storage
following these steps.
Note: The DR/700 must
be calibrated before
sample analysis. See
Calibration following
these steps.
2. Press: I/O
The display will show
450 nm
and module number
45.01
3. After 2 seconds,
the display will show
a program number,
the concentration
units, decimal
position and the zero
prompt. Press the
PROGRAM key once
or twice until the
lower display shows
program number
45.000
The upper display
will show the
concentration of a
previous calibration
standard. If desired
press the
UP ARROW
key to display the
other standard.
‡ User calibration is required, range is approximate.
*Adapted from Standard Methods for the Examination of Water and Wastewater
** Procedure is equivalent to USEPA method 375.4 for wastewater.