Crowcon Q-Test, User & Operator Manual

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Gas Gas Name Recommended Minimum
Concentration
Recommended
Maximum
Concentration
(see note)
N0
2
Nitrogen Dioxide ≥ configured alarm level 1 threshold ≤ 17ppm
NO Nitric Oxide ≥ configured alarm level 1 threshold ≤ 85ppm
O
3
Ozone ≥ configured alarm level 1 threshold
≤ 0.7ppm
(concentration from
recommended
generator)
CL
2
Chlorine ≥ configured alarm level 1 threshold ≤ 3ppm
CLO
2
Chlorine Dioxide ≥ configured alarm level 1 threshold ≤ 0.8ppm
i
Ensure the accuracy of the gas cylinder used does not allow the nominal gas
concentration of the gas applied, to exceed the recommended maximum value.
2.8.2 Smart Bump Recommended Gas Levels
Table 2 shows the recommended minimum and maximum concentration of gas suitable for a Gas-
Pro configured to undertake a smart bump test when inserted into a Q-Test.
Table 2
Gas Gas Name Recommended Minimum
Concentration
Recommended Maximum
Concentration
(see note)
O
2
Oxygen ≥ configured alarm level 1 threshold ≤ 22% VOL
CO Carbon Monoxide ≥ configured alarm level 1 threshold ≤ 400ppm
H
2
S Hydrogen Sulphide ≥ configured alarm level 1 threshold ≤ 85ppm
CO
2
Carbon Dioxide ≥ configured alarm level 1 threshold ≤ 2% VOL
SO
2
Sulphur Dioxide ≥ configured alarm level 1 threshold ≤ 16ppm
CH
4
Methane ≥ configured alarm level 1 threshold
[ATEX] 2.2% VOL
[UL] 2.5% VOL
C
4
H
10
Butane ≥ configured alarm level 1 threshold
[ATEX] 0.7% VOL
[UL] 0.6% VOL
C
3
H
8
Propane ≥ configured alarm level 1 threshold
[ATEX] 0.85% VOL
[UL] 1.05% VOL
Contents
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Prologue
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Operation
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maintenance
Specification
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