
ENMET Corporation EX2000
10
To calibrate an EX-2000 with a gas other than the programmed/labeled gas refer to the coefficient table below.
We recommend using 50% LEL levels of gases. Other levels are acceptable.
Example: Ethyl Acetate recommended calibration gas is Butane and its coefficient factor is 0.9
50%LEL multiplied by the coefficient of the programmed gas 0.9 equals 45.
Apply the 50%LEL Butane to the instrument and adjust the reading on the display to read 45. Calibration is complete.
Table 1: Coefficients of Gases Detected
Gas
Empirical
Formula
%LEL
Recommended
Cal. gas / Coefficient
Ethyte acetate
C
4
H
8
O
2
2.1 % Butane 0.9
Acetone
C
3
H
6
O
2.15 %
H
2
2.6
Acetylene
C
2
H
2
1.5 %
H
2
1.8
Ammonia
NH
3
15.0 %
H
2
0.85
Benzene
C
6
H
6
1,2 % Butane 1.5
1, 3-Butadiene
C
4
H
6
1.4 %
H
2
2.1
Butane
C
4
H
10
1.5 % Butane 1.0
2–Butanone (MEK)
C
4
H
8
O
1.8 % Butane 1.2
Dimethylether
C
2
H
6
O
3.0 % Butane 1.0
Unleaded gasoline Mixture 1.1 % Butane 1.6
Gasoline Mixture 1.3 % Butane 1.4
Ethane C
2
H
6
3.0 % CH
4
1.1
Ethanol C
2
H
6
O 3.3 % H
2
1.95
Ethylene C
2
H
4
2.7 % H
2
1.7
Diesel oil Mixture 0.6 % Butane 3.25
Natural gas
CH
4
5.0 %
CH
4
1.05
L.P.G. Prop+But 1.65 % Butane 1.35
Heptane C
7
H
16
1.1 % Butane 1.95
Hexane C
6
H
14
1.2 % Butane 1.15
Hydrogen H
2
4.0 % H
2
1.0
Isobutane C
4
H
10
1.5 % Butane 1.05
Isopropanol C
3
H
8
O 2.15 % Butane 1.05
Kerosene (JP4)
C
10
- C
16
0.7 % Butane 4.85
Methane
CH
4
5.0 %
CH
4
1.0
Octane
C
8
H
18
1.0 % Butane 2.25
Ethylene oxide
C
2
H
4
O
2.6 % Butane 1.35
Propylene oxide
C
3
H
6
O
2.3 % Butane 1.3
Pentane
C
5
H
12
1.4 % Butane 1.05
Propane
C
3
H
8
2.0 % Propane 1.3
Propylene
C
3
H
6
2.0 % Butane 0.8
Styrene
C
8
H
12
1.1 % Butane 1.6
Toluene
C
7
H
8
1.2 % Butane 1.35
White Spirit Mixture 1.1 % Butane 3.25
Xylene
C
8
H
10
1.0 % Butane 1.6
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