GX-2009 Operator
s Manual24
7. Press and release the POWER MODE button again to return to
Measuring Mo de.
NOTE : If you do not press a button for 20 seconds while in Display Mode,
the GX-2009 will return to Measuring Mode automatically and the
backlight will turn off 30 seconds since the last button was pressed.
Combustible Gas Detec tion
There are two issues that must be considered when monitoring for
combustible gas.
The combustible sensor will respond to any combustible gas. The table
below lists the conversion factors for several hydrocarbon gasses if
the GX-2009 is c alibrated to methane. To use this table, multiply the
display reading o n the c o mbus tible gas c hanne l by the fac to r in the
appropriate row to obtain the ac tual gas c oncentration. For example,
if you are detecting pentane and the display reads 10% LEL on the
c o mbustible c hannel, you ac tually have 10% LEL x 1.35 = 13.5% LEL
pentane present.
Gas LEL Conversion
Fac to r (CH
4
Cal.)
Ac eto ne 1.92
Acetylene 2.00
Benzene 2.00
Ethane 1.25
Ethano l 1.75
Ethyle ne 1. 20
He p tane 1.92
He xane 1.6 5
Hyd ro g e n 1.00
IPA 2 . 5 0
Table 2 : LEL Hydrocarbon Conversions
Gas LEL Co nversion
Fac to r (CH
4
Cal.)
Is o Buta ne 1. 5 6
MEK 1.92
Methane 1.00
Methano l 1.65
Pentane 1.35
Propane 1.52
Propylene 1.33
To l ue n e 2 . 0 0
Xyle ne 0. 93
Operation
21
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