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• For the best accuracy, use a single sample cell for every
measurement or a flow cell.
Note: As an alternative, matched sample cells may be used for measurements but
do not provide as good of accuracy or precision as a single indexed sample cell or
flow cell. When using matched sample cells, align the orientation mark on the
sample cell with the reference mark on the sample cell holder.
Measurement
Turbidity measurement procedure
1. Rinse a clean,
2. Clean the sample
empty sample cell two
cells with a soft, lint-free
times with the solution
cloth to remove water
to be measured and
spots and fingerprints.
drain to waste. Fill to
the line (about 30 mL)
with sample and
immediately put the cap
on the sample cell.
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• Measure samples immediately to prevent temperature changes and
settling. Before a measurement is taken, always make sure that the
sample is homogeneous throughout.
• Avoid sample dilution when possible.
• Avoid instrument operation in direct sunlight.
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 cells.
the sample cells.
Remove the excess oil.
Make sure that the
sample cells are almost
dry.
5. Gently and slowly
6. Put the sample cell
invert the sample cell to
in the sample cell
fully mix the sample. Be
holder with the triangle
careful not to add air
on the sample cell
bubbles.
aligned with the
reference mark on the
sample cell holder.
Close the cover.
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