Thermo Fisher Scientific C101 Colorimeter - Manual (Page 56)

Routine Maintenance
C401/301/201/101/102/103/104/105 Colorimeter
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5 ROUTINE MAINTENANCE
The supplied carrying case is optimal for protecting the instrument. If you
do not plan on leaving the instrument in the supplied carrying case, when
not in use, ensure that the instrument has been turned off and that a clean
sample vial fitted with a black cap has been placed in the sample well.
This will ensure that a minimal amount of dust and/or debris will be able to
settle on the optics of the instrument.
5.1 Vials – Handling, Cleaning and Care
Proper colorimetric measurement of a sample requires the use of a vial
that is free of marks, smudges, scratches and any bacterial growth.
Therefore, sample vials must be handled with absolute care to avoid
contamination or damage, which might change the optical characteristics
of the glass. Scratches, fingerprints, and water droplets on the sample vial
or inside the sample well can cause stray light interference leading to
inaccurate readings.
Cleaning the vial is accomplished by washing the interior and exterior of
the vial in a detergent solution. Once cleaned, the vial should be rinsed
thoroughly 8 to 10 times with clean distilled water to eliminate the
possibility of detergent buildup and streaking.
Sample vials should always be handled from the top or by the cap to avoid
fingerprints or smudges. After a vial has been filled with a sample and
capped, the outside surface should be wiped with a clean, lint-free
absorbent cloth until it is dry. Cleaned and dried vials should be stored
with the black caps on. The vial can be stored in the carrying case. During
normal operation you may use any typical glass cleaner along with a lint
free cloth or tissue (Kimwipes®), to clean the outside of the vials.