1-2
Getting Started
Analyzer Control Unit
The Analyzer Control Unit is the yellow
enclosure that houses the LI-8100A
electronics and infrared gas analyzer.
The interior of the Control Unit contains
the indicator panel, brackets for the
optional 6400-03 Rechargeable Battery,
and an access panel for inserting or
removing the wireless and compact flash
cards. The left side of the Control Unit
has a mount for the Auxiliary Sensor
Interface (below), as well as connections
for the soil flux chambers and RS-232
cable.
Auxiliary Sensor Interface (p/n 8100-
663)
The Auxiliary Sensor Interface attaches
to the side of the Analyzer Control Unit,
as shown at right, and allows for
connection of your choice of sensors, or
an alternative power source. The
Auxiliary Sensor Interface is described in
more detail in Section 2, Initial Setup.
The Auxiliary Sensor Interface (right)
uses “gland” type plugs to seal the wire
connections against moisture and
insects. As many as five different
sensors, or four sensors and an external
power supply can be connected to the
Auxiliary Sensor Interface.
RS-232 Cable (p/n 392-10587)
The RS-232 Cable is a 1 meter cable
with a round connector on one end that
mates to the RS-232 port on the left side
of the Analyzer Control Unit. The other
end of the cable has a 9-pin female DB-
9 connector for attaching to your
computer.
Figure 1-1. Analyzer Control Unit,
with 6400-03 Rechargeable Battery,
Auxiliary Sensor Interface, and
shoulder strap.
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