Enmet OMNI-4000 Manuel d'utilisateur télécharger pdf (Page 44)

ENMET Corporation OMNI-4000 S/N 6705 and above

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

1 2 ... 39 40 41 42 43 44 45 46 47 48 49 ... 71 72

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Enmet OMNI-4000 Manuel d'utilisateur Page 44

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