GX-2003 Operator’s Manual Measuring Mode, Alarms • 27
The table below lists the conversion factors for several hydrocarbon
gasses for the % LEL combustible sensor if it is calibrated to
methane. Conversion factors are not available for the % volume TC
sensor. To use this table, multiply the display reading on the CH4
channel by the factor in the appropriate row to obtain the actual gas
concentration. For example, if you are detecting pentane and the
display reads 10% LEL on the CH4 channel, you actually have 10%
LEL x 1.35 = 13.5% LEL pentane present.
Measuring Mode, Alarms
This section covers alarm indications in Measuring Mode. It also tells
you how to reset the GX-2003 after an alarm has occurred and how to
respond to an alarm condition.
NOTE: False alarms may be caused by radio frequency (RF) or
electromagnetic (EMI) interference. Keep the GX-2003 away
from RF and EMI sources such as radio transmitters or large
motors.
Table 3: LEL Hydrocarbon Conversions
Gas
LEL Conversion
Factor (Methane
Calibration)
Gas
LEL Conversion
Factor (Methane
Calibration)
Acetone 1.92 Iso Butane 1.56
Acetylene 2.00 MEK 1.92
Benzene 2.00 Methane 1.00
Ethane 1.25 Methanol 1.65
Ethanol 1.75 Pentane 1.35
Ethylene 1.20 Propane 1.52
Heptane 1.92 Propylene 1.33
Hexane 1.65 Toluene 2.00
Hydrogen 1.00 Xylene 0.93
IPA 2.50
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