32 • Measuring Mode, Normal Operation EAGLE 2 Operator’s Manual
are detecting pentane and the display reads 10% LEL for the catalytic
combustible channel, you actually have 10% LEL x 1.95 = 19.5% LEL
pentane present.
• 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.
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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