198 • Appendix G: Infrared Sensors
GX-6000 Operator’s Manual
Appendix G: Infrared Sensors
Overview
The infrared sensors are used to monitor levels of methane, combustible gas, and carbon
dioxide. This appendix describes the GX-6000’s infrared sensors and includes instructions
to use a GX-6000 that has one or more infrared sensors installed. It also includes
instructions to replace an infrared sensor. The table below lists the available infrared
sensors along with their specifications.
Table 24: Infrared Sensor Specifications
IR HC Target Gases
The infrared HC sensor is a general hydrocarbon sensor. It is setup for and factory-
calibrated to isobutane.
The infrared HC sensor is known to
not
or to poorly respond to the following combustible
gases:
•
acetylene
•
benzene
•
hydrogen
IR CH
4
Target Gases
The infrared methane sensor is setup for and factory-calibrated to methane. There are
other gases that the sensor will still detect and respond to. There are also gases that the
methane sensor will not detect or respond to. Lists of the gases falling in each of these
respective categories can be found below. Consult RKI Instruments, Inc. for combustible
gases not listed below.
The infrared methane sensor is known to respond to the following combustible gases:
•
acetone
•
ethane
•
ethanol
•
hexane
Sensor
Range
Increment
Alarm 1
Alarm 2
STEL
TWA
IR CO
2
0 - 10.00 %vol
0.02 %vol
0.50 %vol
3.00 %vol
3.00 %vol
0.50 %vol
0 - 10,000 ppm
20 ppm
5,000 ppm
N/A
N/A
5,000 ppm
IR HC %LEL
0 - 100 %LEL HC
1 %LEL
10 %LEL
50 %LEL
N/A
N/A
IR HC
Autoranging
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
IR CH4 %LEL
0 - 100 %LEL CH4
1 %LEL
10 %LEL
50 %LEL
N/A
N/A
IR CH4
Autoranging
0 - 100 %LEL CH4
1 %LEL
10 %LEL
50 %LEL
N/A
N/A
5.0 - 100 %vol CH4
0.5 %vol
N/A
N/A
N/A
N/A