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TurbiDirect_6 02/2019
2.3.8.4 Indexing and matching sample vials
Matched sample vials are required to minimise the effects of optical variation from glass vial to
glass vial. Alternatively an indexed single sample vial can be used for every measurement.
Once vial orientation in the sample chamber is located, always use this new orientation mark
for all measurements independent of the white pre-printed triangle mark.
2.3.8.5 Indexing a single sample vial
Fill a clean and dry vial up to the mark with dilution
water
(see chapter 2.3.7.1 Preparing Dilution Water).
Cap the vial.
Hold the vial by the cap and clean it with the supplied clea-
ning tissue to remove water spots and finger prints.
Switch the turbidimeter on.
Place the vial in the sample chamber.
Make sure that the marks are aligned.
Place the cover on the instrument.
ON
OFF
