The measuring cell glasses are made of sapphire glass. The glasses have
an anti-reflective coating on the outside which is very soft. A scratch in
the anti-reflective coating has the same effect as a scratch in the glass
and can affect the measurement.
NOTICE!
The anti-reflective coating is very soft. Cleaning with
standard solvent-free cleaning agents can cause
scratches.
Therefore only use lens cleaning paper from the acces-
sory case.
7.6.5.1
Measuring cell glasses
The following cleaning method for the measuring cell glasses has proven
successful:
Rinse the glasses with a spray bottle, filled with the measuring liquid
used, until no more major soiling is visible. Then place the optics tissue
on the inside of the glass and moisten it with the measuring liquid and a
drop of tenside (Pril
TM
), so that the paper clings to the glass surface.
Now to "wipe" the surface, just pull the tissue off parallel to the surface,
without pressing the tissue onto the glass.
You may have to repeat this wiping of the glass surface with fresh tissue,
until you can see no more soiling. You can soak extremely adhesive
sample residues with a tenside (e.g. Pril
TM
) and wipe them very carefully
with the optics tissue.
Then rinse the measuring cell glasses clean with the spray bottle and dab
them carefully with the dry optics tissue. You should keep the glasses
carefully covered until you reinstall them in the measuring cell.
7.6.6 Sealing rings
Rinse the seal rings under particle-free, running water and then dry them
with lint-free soft tissue.
Cleaning
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