EAGLE 2 Operator’s Manual
Measuring Mode, Normal Operation • 35
•
The EAGLE 2 provides the catalytic combustible sensor with some protection against
exposure to high levels of combustible gas which can damage the sensor. It does this
by turning off the combustible sensor power temporarily when it determines that an
over scale (more than 100% LEL) concentration of combustible gas is present that
may damage the sensor. Nevertheless, concentrations of combustible gas of more than
100% LEL can still affect the zero level or calibration of the combustible sensor if the
concentration is high enough.
CAUTION:
Do not expose the catalytic combustible sensor to high concentrations of
combustible gas such as that from a butane lighter. Exposure to high
concentrations of combustible gas may adversely affect the performance of
the sensor.
CAUTION:
Any rapid increase in the combustible gas reading on the catalytic
combustible channel followed by a declining or erratic reading may
indicate a gas concentration above the LEL which may be hazardous.
Table 5: Full Response Mode Conversion Factors (Methane Calibration)
Target Gas
LEL Factor
PPM Factor
Target Gas
LEL Factor
PPM Factor
Acetone
1.40
0.70
Isobutane
1.61
0.58
Benzene
1.75
0.42
Isopropanol
2.22
0.89
Butyl Acrylate
3.95
1.34
Methane
1.00
1.00
Butyl Acetate
3.38
0.88
Methanol
1.23
1.48
2-Butyl Alcohol
1.94
0.66
Methyl Acetate
1.37
0.85
1-Butyl Alcohol
2.65
0.74
Methyl Acrylate
1.10
0.62
Cyclohexane
1.82
0.47
Methyl Ethyl
Ketone
2.53
0.71
Cumene
3.90
0.70
Methyl Isobutyl
Ketone
2.53
0.61
Ethylene
Dichloride
2.75
3.41
Mixed Xylenes
2.36
0.52
Ethyl Alcohol
1.38
0.91
Nonane
2.87
0.46
Ethyl Chloride
1.26
0.96
Pentane
1.95
0.59
Ethyl Acrylate
2.45
0.69
Propane
1.50
0.63
Hexane
2.44
0.54
Styrene
2.94
0.53
Hydrogen
1.16
0.93
Toluene
2.16
0.48
Vinyl Acetate
Monomer
1.48
0.77
*
Vapor pressure too low for significant LEL reading
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