Hach 2100P Instrument And Procedure Manual page 25

SECTION 2,
1.
Fill the clean sample
cell to the line with
high quality water
(< 0.5 NTU). Cap and
wipe with lint-free cloth.
Apply silicone oil. See
Section 3.6.2.2 on
page 40 for more
information about
high quality water.
READ
4.
Press:
READ
Record the cell's position
in the cell compartment
and the displayed
reading.
Note: This procedure may
be easier if the user holds
the key through the
READ
whole process. This allows
the lamp to remain on and
make continuous readings.
continued
2.
Press:
instrument on.
5.
Remove the cell,
rotate it slightly and
reinsert it into the cell
compartment. Close the
cover, then press
Record the cell's position
and the displayed
reading.
I
O
3.
to turn the
I/O
cell into the sample
compartment. Close
the cover.
6.
the lowest reading is
displayed. Place an
orientation mark on the
. cell's 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.
25
Insert the sample
Repeat step 5 until