LI-COR LI-3100C, Instruction Manual

Page: 43 / 50

Section 8.
Removing the upper belt assembly
Some sampling requirements are better served by single belt operation. Under some
conditions, the upper belt pressure may damage samples, or the upper belt rocking
idler may cause undesirable mechanical pressure. Removing the upper belt pulley,
drive pulley, and rocking idler will provide a more obstruction-free path through the
sensitive area. The fluorescent tube must remain in place so sample thickness is lim-
ited to 2.5 cm (increased from 2.0 cm with upper belt assembly intact).
1
Disconnect the power.
2 Remove the rear housing (see Rear housing removal on page 2-1).
3
Loosen the transparent belts (see Transparent belt tension adjustment on page 2-1).
4 Remove the fluorescent tube (see Fluorescent tube installation on page 2-3).
5 Separate the fluorescent tube power cord connector located near the instrument front plate and
under the belt drive pulleys. This connector may remain mated if the front plate can rest near the
instrument without straining the cord (see
Figure 4-2 on page 4-3).
6
Remove the hexagonal socket screws (7 total) which are directly contacting the instrument plate
(see
Figure 2-2 on page 2-3). Other similar screws are visible on the front of the instrument which
fasten the pulley support brackets (see Figure 4-2 on page 4-3). Do not loosen those screws.
7
Slowly remove the front plate. Be certain that all pulleys and idlers remain in place, resting on the
support brackets (see
Figure 4-2 on page 4-3). This is accomplished by repeatedly pressing the pul-
leys and idlers back into their rear plate bearings.
Caution: Do not allow the upper belt rocking idler or the lower belt idler to drop
onto the mirror located directly beneath these components.
8 Remove the upper belt rocking idler.
9
Remove the upper pulley.
10 Remove the upper belt.
8-1 LI-3100C Area Meter Manual