226 • Overview
EAGLE 2 Operator’s Manual
Appendix I: Infrared Hydrocarbon Sensor
Overview
This appendix describes the EAGLE 2’s infrared hydrocarbon sensor and includes
instructions to use an EAGLE 2 that has an infrared hydrocarbon sensor installed. It also
includes instructions to replace an infrared hydrocarbon sensor.
Table 31: Infrared Hydrocarbon Sensor Specifications, %LEL Configuration
Table 32: Infrared Hydrocarbon Sensor Specifications, Autoranging Configuration
NOTE:
The gas name on the infrared hydrocarbon channel will normally read “HC”.
However, depending on the instrument’s shipment date and any special
requirements, your instrument may read “IBU” or some other gas name.
Target Gases
The infrared HC sensor is a general hydrocarbon sensor. It is setup for and factory-
calibrated to isobutane.
Description
Table 31 and Table 32 above list the available infrared hydrocarbon sensor configurations.
The infrared hydrocarbon sensor is a smart sensor that stores the target gas. The infrared
hydrocarbon 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 43 above illustrates a typical infrared hydrocarbon
sensor location in front of the pump. The infrared hydrocarbon 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 hydrocarbon instrument configurations do not
include the 4-sensor flow chamber.
Range
Increment
Alarm 1
Alarm 2
STEL
TWA
0-100 %LEL HC
1 %LEL
10 %LEL
50 %LEL
N/A
N/A
Range
Increment
Alarm 1
Alarm 2
STEL
TWA
0-100 %LEL HC
1 %LEL
10 %LEL
50 %LEL
N/A
N/A
2.0-30.0 %vol HC
0.5 %vol
N/A
N/A
N/A
N/A
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