EAGLE 2 Operator’s Manual
Start Up and Normal Operation • 227
Figure 43: Typical Infrared Hydrocarbon Sensor Location
Infrared Hydrocarbon Sensor
The infrared hydrocarbon 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 hydrocarbon 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 hydrocarbon sensor is used with the EAGLE 2. The
infrared hydrocarbon 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.
Start Up and Normal Operation
For instructions to startup and use an EAGLE 2 that includes an infrared hydrocarbon
sensor, reference “Start Up” on page 27, “Measuring Mode, Normal Operation” on
page 33, and “Measuring Mode, Alarms” on page 38.
0-100 %LEL/2.0-30.0 %vol Autoranging
The infrared hydrocarbon sensor can be factory set to detect gas in a 0-100 %LEL
configuration or an autoranging configuration. The autoranging configuration detects gas
CO Sensor
LEL Sensor and
Sensor Bracket
Pump
Charcoal Filter
Oxygen Sensor
Bracket
Infrared HC Sensor
Top Case Not Shown
H2S Sensor
Standard Flow Chamber
Oxygen Sensor
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