ENMET OMNI-4000 - Manual (Page 44)

ENMET Corporation OMNI-4000 S/N 6705 and above
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Selecting the Type of Gas for the Explosive Gas Channel, Channel 1.
Twenty-seven (27) explosive gases are preprogrammed and can be selected and displayed. See the FIGURE 3-4.
Also, a gas known as "Other" can be given a multiplier coefficient by the operator. Proceed as follows:
•
After Enable is selected, the present gas is displayed
•
Press the MENU switch repeatedly to view the list of 27 gases presented one-by-one on the display
•
If the desired gas is not the "Other" gas, press the ENTER switch to select the gas and go to the "Setting An Alarm
Threshold for the Explosive Gas Channel".
Figure 3-4: Table of Gases, Associated Parameters and Coefficients
List of pre-programmed gases and vapors. The coefficients are given relative to methane.
Gas LEL UEL Vapor
Density
Coefficient CH4
Ethyl acetate 2.1% 11.5% 3.0 1.35
Acetone 2.15% 13% 2.1 1.25
Acetylene 1.5% 100% 0.9 1.1
Butane 1.5% 8.5% 2.0 1.60
1,3 – Butadiene 1.4% 16.3% 1.85 1.25
2 – Butanone 1.8% 11.5% 2.5 1.5
Dimethylether 3.0% 27.0% 1.6 1.55
Ethanol 3.3% 19.0% 1.6 1.1
Ethylene 2.7% 37.0% 0.98 1.2
Natural gas 5.0% 15.0% 0.55 1.05
Hexane 1.2% 7.4% 3.0 1.6
Hydrogen 4.0% 75.6% 0.069 0.55
Isobutane 1.5% ≅ 1.5% 2.0 1.6
Isopropanol 2.15% 13.5% 2.1 1.6
Methane 5.0% 15.0% 0.55% 1.0
Ethylene oxide 2.6% 100% 1.5 2.1
Propylene oxide 2.3% ? 2.0 2.0
Pentane 1.4% 8.0% 2.5 1.7
Propane 2.0% 9.5% 1.6 1.3
Propylene 2.0% 11.7% 1.5 1.1
Gasoline, 95 octane 1.1% ≅ 6% 3 to 4 2.4
Toluene 1.2% 7.0% 3.1 2.2
Xylene 1.0% 7.6% 3.7 2.6
Diesel 0.6% ≅ 6.0 > 4 5.0
Methanol 5.5% 44.0% 1.1 0.8
Kerosene(JP4) 0.7% 5.0% > 4 7.5
Octane 1.0% 6.0% 3.9 1.7