Hach DR/700 Procedures Manual page 737

Colorimeter
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SILICA, LR
For water and seawater
Heteropoly Blue Method*
1.
Install module
81.01
in a DR/700.
Note: If samples cannot
be analyzed
immediately, see
Sampling and Storage
following these steps.
*Adapted from Standard Methods for the Examination of Water and Wastewater.
(0 to 2.00 mg/L)
2.
Press:
l/O
The display will show
810 nm
and module number
81.01
81-63
Method 8186
3.
After 2 seconds,
the display will show
a program number,
concentration units,
decimal position and
the zero prompt. If
necessary, press the
key until
UP ARROW
the lower display
shows program
number
81.05.1

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