Hach 2100P ISO Manual page 42

Portable turbidimeter
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SECTION 3,
READ
7.
Press:
READ
Record the cell position
in the compartment and
the displayed reading.
10.
Repeat step 6
through step 9 if
matching other
sample cells.
continued
8.
Remove the cell,
rotate it slightly and
reinsert into the cell
compartment. Close the
cover, then press
again. Record the cell
position and the
displayed reading.
9.
the value displayed for
the second cell is within
0.01 FNU (or 1%) of the
value obtained for the
READ
first cell. Place an
orientation mark on the
second cell marking band
so it is consistently
inserted in this position.
Note: Due to variability
in glass, it may not be
possible to match all cells.
42
Repeat step 8 until

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