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SECTION 3,
1.
Fill the clean sample
cell to the line with
high quality water
(< 0.5 FNU). Cap and
wipe with lint-free cloth.
Apply silicone oil. See
Section
2.4.2.2 on page
25
for more information
about high quality water.
READ
4.
Press:
READ
Record the cell position
in the compartment and
the displayed reading.
Note: This procedure may be
easier if the user holds the
key through the whole
READ
process. This allows the lamp
to remain on and make
continuous readings.
continued
2.
Press:
5.
Remove the cell,
rotate it slightly and
reinsert it into the cell
compartment. Close the
cover, then press
Record the cell position
and the displayed
reading.
I
O
3.
.
I/O
cell into the sample
compartment. Close
the cover.
6.
the lowest reading is
displayed. Place an
orientation mark on the
.
cell marking band near
READ
the top of the cell so the
cell can be consistently
inserted in the position
that yields the lowest
reading. When using the
cell, always place it in
the instrument so the
orientation mark aligns
with the raised mark on
the instrument.
40
Insert the sample
Repeat step 5 until
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