Hach Lange 2100AN, Instrument Manual

Page: 21 / 108

SECTION 2,
continued
21
1.
Fill the clean sample
cell to the line with high-
quality water and cap the
sample cell (refer to
Section 2.3.3 on page 19.
2.
Wipe the sample cell
clean and apply a film of
silicone oil (refer to
Section 2.3.2 on page 18.
3.
Insert the appropriate
filter module.
4.
Insert the sample cell
into the cell compartment
and close the cell cover.
Record the reading.
5.
Lift the cell
compartment cover and
rotate the sample cell
(approximately
1
/
8
of a
turn). Close the lid, press
ENTER
and record the
reading. Continue this
procedure until obtaining
the smallest NTU reading.
6.
Place an orientation
mark on the sample cell
marking band adjacent to
the index mark. Use this
mark to align the sample
cell each time a
measurement is made.