RKI Instruments EAGLE 2 Manual - Manual (Page 119)

EAGLE 2 Operator’s Manual Using Setup Mode • 109
LEL is shown in terms of ppm. The available choices are on two screens.
All of the gases except for the one with the asterisk (*) next to it are pre-
defined. The gas with the asterisk next to it is user defined. The user defined
gas can be used if the desired gas is not one of the pre-defined gases. Below
is a brief description of each choice.
• 50000 ppm CH4
This selection is for methane (CH
4
) and is the standard factory
setting. The LEL for methane is 5 %volume, or 50,000 ppm. If the
gas is configured for this choice, the methane elimination feature is
inactive and the Methane Elimination Mode Screen will not appear in
Display Mode. See “Methane Elimination Mode Screen” on page 43
for a description of the Methane Elimination Mode Screen. See
“Appendix J: Methane Elimination Mode” for a description of
Methane Elimination Mode.
• 11000 ppm HEX
This selection is for hexane. The LEL for hexane is 1.1%, or 11,000
ppm. If the gas is configured for this choice, the methane elimination
feature is active and the Methane Elimination Mode Screen is
accessible in Display Mode. See “Methane Elimination Mode
Screen” on page 43 for a description of the Methane Elimination
Mode Screen. See “Appendix J: Methane Elimination Mode” for a
description of Methane Elimination Mode.
• 40000 ppm H2
This selection is for hydrogen (H
2
). The LEL for hydrogen is 4%, or
40,000 ppm. If the gas is configured for this choice, the methane
elimination feature is inactive, the Methane Elimination Mode Screen
will not appear in Display Mode, and the catalytic sensor voltage is
set to 1.1 volts. The standard catalytic sensor voltage is 2.4 volts.
Because the detector voltage is set to 1.1 volts, the catalytic sensor
will not respond significantly to methane and many other
combustible gases, but will respond to hydrogen.
CAT(0-50000ppm CH4)
50000 ppm CH4
11000 ppm HEX
40000 ppm H2
> 18000 ppm IBU
CAT(0-50000ppm CH4)
> 50000 ppm GAS
50000 ppm CAT
10000 ppm - - - *
AIR
YES
RANGE
SHIFT
END