LI-COR LI-3100C, Instruction Manual

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Section 3. Operation
Pressing roller adjustment
Curled leaves are effectively flattened and held rigidly between the transparent belts
for more accurate measurements by use of the adjustable pressing roller. This is
nearly essential for small grasses, legumes and aquatic plants.
In Figure 3-1 below, the front panel is removed to show mechanical details. The
retracted position is for use with thick leaves. The fully raised position for use with
the thinnest leaf types is shown in
Figure 3-2 on the facing page.
To raise the pressing roller, the lower belt tension must be released to prevent
stretching. To do this, simply loosen the knurled knobs on both sides of the sliding
bearing blocks for the lower belt. Then loosen the knurled knobs on both sides of
the pressing roller and raise to the desired position. After tightening the pressing
roller, refer to
Transparent belt tension adjustment on page 2-1 to adjust the lower belt
to its proper tension and alignment.
Figure 3-1. Adjustable press roller in the retracted position.
3-4 LI-3100C Area Meter Manual