ENMET OMNI-4000 User Manual
Page 44
ENMET Corporation
OMNI-4000 S/N 6705 and above
38
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