8.9 Indexing a single cell
Precise measurements for very low turbidity samples require the use of
a single cell for all measurements or optically matching the cells. Use
one cell to provide the best precision and repeatability. When one cell is
used, an index or orientation mark (other than the factory-placed
diamond) can be placed on the cell so it is inserted into the instrument
with the same orientation each time.
When using a single cell, make an index or orientation mark on the cell
as follows:
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