Hach TL2350 Manuel D'utilisation De Base page 18

Turbidity measurement procedure
To include an operator ID and sample ID with the measurement data, refer to
on page 12 and Add operator IDs
1. Push Login and
select the applicable
Operator ID. If login is
not necessary, go to
step 3.
5. Clean the sample
cells with a soft, lint-free
cloth to remove water
spots and fingerprints.
9. Put the sample cell
in the sample cell
holder with the triangle
on the sample cell
aligned with the
reference mark on the
sample cell holder.
Push the lid closed until
a click is heard.
18 English
on page 12.
2. Push Login and
enter the password.
Push OK.
6. Apply a small bead
of silicone oil from the
top to the bottom of the
sample cells.
10. Push Read (or
Done if in continuous
mode). Wait for the
instrument to read the
sample.
Note: If auto store is
off, push Options >
Store to save the data.
3. Push Sample ID.
Select the applicable
sample ID, then push
Select. The selected
sample ID shows on the
display.
7. Use the oiling cloth
provided to apply the oil
equally to the surface of
the sample cells.
Remove the excess oil.
Make sure that the
sample cells are almost
dry.
Add sample IDs
4. Rinse a clean,
empty sample cell two
times with the solution
to be measured and
drain to waste. Fill to
the line (about 30 mL)
with sample and
immediately put the cap
on the sample cell.
8. Gently and slowly
invert the sample cell to
fully mix the sample. Be
careful not to add air
bubbles.