Hach 2100P ISO - Page 42

42
SECTION 3, continued
7. Press: READ
Record the cell position
in the compartment and
the displayed reading.
8. Remove the cell,
rotate it slightly and
reinsert into the cell
compartment. Close the
cover, then press
READ
again. Record the cell
position and the
displayed reading.
9. Repeat step 8 until
the value displayed for
the second cell is within
0.01 FNU (or 1%) of the
value obtained for the
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.
10. Repeat step 6
through step 9 if
matching other
sample cells.
READ