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Thermo Scientific Orion AQUAfast AQ3010 Turbidity Meter User Guide
1 . Samples should not be violently shaken or agitated as particles can be
broken apart or air may be entrapped into the fluid . Gentle agitation
such as swirling the sample vial is advisable to reduce particle settling .
2 . Sample vials should be used only with the instruments for which they
were intended . Do not mix and match vials . The AQ3010 uses 25
mm sample vials .
3 . Perform a visual observation of the sample vial every time a
measurement is made . Ensure that there are no visible bubbles in the
sample and the vial is clean and free of scratches .
4 . Samples entering the turbidity meter should be at the same
temperature as the process flow samples . Changes in temperature can
cause precipitation of soluble compounds and affect readings .
5 . Sample vials should be evaluated with a low turbidity water
(after cleaning) to determine if cells remain matched . If the
evaluation determines that a cell is corrupted, discard the vial . It is
recommended to conduct this evaluation weekly .
6 . When in doubt about whether a sample vial is too scratched or
stained, throw it away .
1 . Keep the calibration standard plastic bottles and vials tightly capped
and ensure that they are not allowed to freeze .
2 . Check that the standards have not expired .
3 . Make sure that the calibration vials are free of dust, smudges and
scratches before use .
4 . Conduct the calibration in the same manner each time . Variations
in how the calibration is performed could yield inaccurate
measurements .
5 . It is very important that the users who perform calibration have been
trained to do so . Creating a Standard Operating Procedure (SOP) for
the users to read, learn, and practice may help to ensure precision .
Other
mportant
Sampling
Techniques
Calibration
Techniques