RKI Instruments GX-2001 Canadian Version - Manual (Page 18)

18 • Operation Model GX-2001 Operator’s Manual
on the combustible channel, you actually have 10% LEL x 1.35 = 13.5%
LEL pentane present.
• The GX-2001 provides the combustible sensor with some protection
against exposure to high levels of combustible gas. 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 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 perform of the sensor.
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