Beckman Coulter LS 13 320, User Manual

Page: 213 / 254

PN B05577AC 6-83
Sample Modules
Universal Liquid Module
6
5
Cup your hand over the loose retaining ring and tilt the sample cell stand until the retaining
ring falls into your hand.
NOTE
You can now lay down the sample stand so the window to be replaced is facing up.
6
Stick a piece of masking tape on the window and lift the tape up to remove the O-ring and
window. This may take several tries.
7
Discard the old O-ring, window and nylon screws.
8
Hold the new window by its edge to determine the coated side. Determine which side is the
correct one. Refer to
Figure 6.49 .
Figure 6.49 ULM Pencil
a.
Take the eraser end of a pencil and hold it close to the window, near its edge. Note the two
reflections of the pencil, dark- and light-colored.
b.
Turn the window over and repeat step a.
c.
The side that reflected a dark 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 with lens tissue wetted with lens cleaner.
1. O-ring
2. Coated Side
3. Light-Colored Reflection
4. Dark-Colored Reflection