Indexing A Single Sample Cell - Hach 2100AN IS User Manual

Indexing a single sample cell

When measuring very low turbidity samples, use a single indexed sample cell or a flow cell for all measurements to get precise and repeatable
measurements. As an alternative, optically matched sample cells can be used. Refer to
not provide as good of accuracy and precision as a single indexed sample cell that is used for every measurement or a flow cell.
1. Rinse a clean, 2. Clean the sample
empty sample cell two cell with a soft, lint-free
times with dilution water cloth to remove water
and drain to waste. Fill spots and fingerprints.
the sample cell to the
line (about 30 mL) with
dilution water and
immediately put the cap
on the sample cell.
Refer to Prepare
dilution water
on page 23.
Let the sample cell sit
for at least five minutes
to degas.
3. Apply a small bead 4. Use the oiling cloth
of silicone oil from the provided to apply the oil
top to the bottom of the equally to the surface of
sample cell. the sample cell.
Remove the excess oil.
Make sure that the
sample cell is almost
dry.
Matching sample cells on page 21. Matched sample cells do
5. Put the sample cell
in the sample cell
holder. Close the cover.
Record the value when
stable.
6. Remove the sample
1
cell, turn it about / of a
8
turn and put it in the
sample cell holder
again. Close the cover.
Record the value when
stable.
English 19