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16.2 Cross Calibration Flammable Gas Detector
(Not tested as part of the performance approval)
For greatest accuracy, a catalytic gas detector should be calibrated using
a certified gas/air mixture equal to 50%LEL of the actual target gas
intended to be monitored.
However, it is not always practical to obtain every detectable type of
hydrocarbon gas in a calibration-ready, certified and verifiable form.
Therefore, it is possible to carry out a "correction factor" to calibrate using
another hydrocarbon gas/air mixture.
Where the user calibrates any sensor using a difference gas, responsibility for
identifying and recording calibration rests with the user. Refer to the local
Gas/Vapour
Methane
Hydrogen
Ethane
Propane
Butane
Pentane
Hexane
Heptane
Octane
Ethylene
Methanol
Ethanol
Propan-2-ol
Acetone
Butan-2-one
(MEK)
MIBK
Cyclohexane
Di-Ethyl Ether
Notes:
regulations where appropriate.
Relative Response%
100
121
70
61
49
42
39
35
32
70
72
54
40
42
40
30
37
39
79
RAEGuard 3 User Manual
Correction
Factors(CF)
1.00
0.83
1.43
1.64
2.04
2.38
2.56
2.86
3.13
1.43
1.39
1.85
2.50
2.38
2.50
3.33
2.70
2.56
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