48
Cleaning
7.6.5.1
Measuring cell glasses
The following cleaning method for the measuring cell glasses has proven suc-
cessful:
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.
7.6.7
Mounting the wet measuring cell
Once you have cleaned the parts, you have to re-install the measuring cell.
To assemble the measuring cell, follow the same steps in reverse order:
1.
Assemble the wet measuring cell as shown in the image.
2.
Observe the installation direction when inserting the measuring cell
glasses.
The bluish shimmering anti-reflective coating must face
outwards. There are arrows on the window edges (see
image); the arrow tip faces the coating.
3.
Tighten the 4 screws carefully "crosswise".
7.6.8
Check the wet measuring cell for impermeability
Leave the measuring cell on a paper towel and check the measuring cell for leaks.
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