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7 Technical data
7.2.2
Setting ranges of alarm thresholds for different gas types
The factory settings are shown in bold.
Gas type
AL1
AL2
All (%LEL)
Threshold
10 % LEL
50 % LEL
Methane (CH
4
)
Threshold
0.45 % vol.
2.20 % vol.
Setting range
0.45 – 2.20 % vol. 0.50 – 2.64 % vol.
Increment
0.05 % vol.
0.05 % vol.
Propane
(C
3
H
8
)
Threshold
0.18 % vol.
0.86 % vol.
Setting range
0.18 – 0.85 % vol. 0.18 – 1.02 % vol.
Increment
0.02 % vol.
0.02 % vol.
Butane (C
4
H
10
)
Threshold
0.14 % vol.
0.70 % vol.
Setting range
0.14 – 0.70 % vol. 0.16 – 0.84 % vol.
Increment
0.02 % vol.
0.02 % vol.
Hexane
(C
6
H
14
)
Threshold
0.10 % vol.
0.50 % vol.
Setting range
0.10 – 0.50 % vol. 0.11 – 0.60 % vol.
Increment
0.01 % vol.
0.01 % vol.
Nonane
(C
9
H
20
)
Threshold
0.08 % vol.
0.36 % vol.
Setting range
0.08 – 0.35 % vol. 0.08 – 0.42 % vol.
Increment
0.02 % vol.
0.02 % vol.
Kerosene
(JFUEL)
Threshold
0.07 % vol.
0.35 % vol.
Setting range
0.07 – 0.35 % vol. 0.07 – 0.42 % vol.
Increment
0.01 % vol.
0.01 % vol.
Hydrogen (H
2
)
Threshold
0.40 % vol.
2.00 % vol.
Setting range
0.40 – 2.00 % vol. 0.44 – 2.40 % vol.
Increment
0.04 % vol.
0.04 % vol.
Acetylene
(C
2
H
2
)
Threshold
0.25 % vol.
1.15 % vol.
Setting range
0.23 – 1.10 % vol. 0.25 – 1.38 % vol.
Increment
0.01 % vol.
0.01 % vol.
