Beckman Coulter LS 13 320, User Manual

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PN B05577AC 6-19
Sample Modules
Aqueous Liquid Module
6
Figure 6.11 Pencil Reflections Test
a.
Take the eraser end of a pencil and hold it close to the window, near its edge. Note the two
reflections, dark and light colored, of the pencil.
b.
Turn the window over and repeat step (a).
c.
The side that reflected a dark-colored reflection is the coated side.
CAUTION
Use lens tissues only once, then discard. Never use silicone-coated, eyeglass lens
tissues to clean lenses or sample cell windows, as this type of tissue may leave a
film. Wash your hands thoroughly before cleaning any lens or sample cell window.
Do not touch optical surfaces with your fingers or skin. Body oils are difficult to
remove without harming the anti-reflective coating.
9
Lay the window, coated side down, on a piece of lens tissue.
10
Clean the window using lens tissue wetted with lens cleaner.
11
Gently place the window, coated side to the outside of the sample cell, into the diffraction
window opening. It must be flat to avoid scratching the other window.
12
Lubricate the O-ring with lens cleaning solution.
13
Carefully place the new O-ring on top of the window.
14
Insert the grooved end of the window-sealing tool into the sample cell. Push in gently and twist
from side to side to seat the O-ring.
1. O-ring
2. Coated Side
3. Light-Colored Reflection
4. Dark-Colored Reflection