EAGLE 2 Operator’s Manual
Description • 201
Figure 40: Typical Infrared CO
2
Sensor Location
The infrared CO
2
sensor is installed in a single sensor flow chamber which is located in
the area next to the standard 4-sensor flow chamber. This area can accommodate up to
three single sensor flow chambers. Figure 40 above illustrates a typical infrared CO
2
sensor location in front of the pump. The infrared CO
2
flow chamber may also be installed
in one of the other two sensor chamber locations depending on the particular version of
the EAGLE 2. Some infrared CO
2
instrument configurations do not include the 4-sensor
flow chamber.
Infrared CO
2
Sensor
The infrared CO
2
sensor is a cylindrical sensor with a diffusion opening on the front and a
12 pin circular connector on the back. A 12 wire cable plugs into the back of the infrared
CO
2
sensor with a circular connector that includes a locking lever. The other end of the
cable plugs into an infrared sub PCB (see description below) that is installed on the main
PCB. The sensor is held in the infrared flow chamber by a bracket on standoffs.
Infrared Sub PCB
The infrared sub PCB is a circuit board that is installed on the main PCB in one of the 3
sub PCB positions when an infrared CO
2
sensor is used with the EAGLE 2. The infrared
CO
2
sensor connects to the sub PCB with a 12-position connector. The sub PCB plugs into
the main PCB and is held in place with a screw/flat washer/lock washer. There are no user
serviceable parts on the infrared sub PCB.
H2S Sensor
Pump
Top Case Not Shown
CO2 Scrubber
Infrared CO2 Sensor
Standard Flow Chamber
Charcoal Filter
CO Sensor
Oxygen
Sensor
Bracket
LEL Sensor and
Sensor Bracket
Oxygen Sensor
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