193 • Overview GX-6000 Operator’s Manual
Appendix D: 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.
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
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