Hach DR/850 Procedures Manual page 301

Colorimeter
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ORGANIC CARBON, TOTAL, Mid Range,
17.
Tightly cover the
vial assembly with the
instrument cap.
21.
Tightly cover the
vial assembly with the
instrument cap.
18.
Press:
ZERO
The cursor will move to
the right, then the
display will show:
0 mg/L C
22.
Press:
READ
The cursor will move to
the right, then the result
in mg/L C will be
displayed.
continued
19.
Wipe the sample
vial assembly with a
damp towel, followed by
a dry one, to remove
fingerprints or other
marks.
301
20.
Place the sample
vial assembly in the
adapter.
Push straight down on
the top of the vial
assembly until it seats
solidly in the adapter.

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