LI-COR LI-3100C, Instruction Manual

Page: 7 / 50

Section 1.
General information
The LI-3100C Area Meter precisly measures area (length and width) of objects in bio-
logical, industrial, and other applications.
Instrument function
Samples are placed between the guides on the lower transparent belt and allowed to
pass through the instrument. As items travel under the 15 watt fluorescent light
source, the object is reflected by a system of three mirrors to a solid state scanning
camera within the rear housing.
Width is sensed by the scanning camera. Length information is provided by the cur-
rent frequency as related to the belt velocity. Area integration is accomplished by
components of the main printed circuit board mounted on the instrument rear plate
(
Figure 2-1 on page 2-2).
Data are presented on the light emitting diode (LED) display. Decimal location on
the display is changed to suit the 1.0 or 0.1 mm
2
resolution requirement ( Changing
measurement resolution on page 4-1). Alternatively, data can be collected, displayed,
and stored using a PC (see Using the Windows® interface software on page 5-1).
Operational features
The LI-3100C features interchangeable 1.0 mm
2
and 0.1 mm
2
resolution capability
that is furnished with a single 28 mm camera lens. A 25 cm wide sample guide is
provided for both 1.0 mm
2
and 0.1 mm
2
resolution configurations.
The upper belt assembly can be removed for operations hindered by the upper belt.
Sample thickness can then be increased to 2.5 cm (see
Removing the upper belt
assembly on page 8-1).
1-1 LI-3100C Area Meter Manual