6-12 | Model 933S UV Analyzer
b. Standard Range
Hold the Measuring Cell vertically with the Reflector Block up-
ward and remove the Reflector Block.
Grasp the edge of the Window and carefully remove it. Remove
the two o-rings.
Low Range
Hold the Measuring Cell vertically with the Reflector Block up-
ward and remove the Reflector Block. Remove the o-ring.
Remove the Window Mounting Plate from the Window Holder.
Grasp the edge of the Window and carefully remove it. Remove
the o-rings.
c. Inspect the Cell Windows (or Window/Mirror Combination – Low
Range Cell only) for scratches, chips, and cracks and discard if
damaged. If the Windows (or Window/Mirror Combination) are
not damaged, carefully clean them:
Cell Windows (and Window side of Window/Mirror Combination):
Clean with a dry Kimwipes tissue or with a small amount of 2-pro-
panol.
Window/Mirror Combination (Low Range Cell only):
Stand the Mirror vertically and apply 2-propanol (ultra pure
Isopropyl Alcohol) to its surface. Gently place a Kimwipes
®
EX-L
tissue (or an equivalent extra low-lint tissue) on the surface and
allow it to absorb the alcohol and gently pull the Kimwipes tissue
along the surface of the mirror. Dry the Mirror with filtered instru-
ment air or allow to air dry. Do not touch the Mirror surface with
your fingers, scratch or rub the Mirror, or use water on a Mirror.
To clean the Window side of the Window/Mirror Combination, see
“Cell Windows,” above.
d. Inspect the interior of the Measuring Cell for particulate and clean
it with a nonabrasive detergent and water solution, Isopropanol,
or reagent-grade acetone followed by a rinse with pharmaceutical-
grade distilled water.
Allow all components to dry thoroughly before reassembling.
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