Crowcon Q-Test, User & Operator Manual

Page: 22 / 30

22
2.8.3 Calibration after bump fail Recommended Gas Levels
Table 3 shows the recommended minimum and maximum concentration of gas suitable for a Gas-
Pro when configured to undertake a bump fail calibration, when the unit fails either a speedy or a
smart bump.
Table 3
Gas Gas Name Recommended
Minimum
Concentration
Recommended
Concentration
Recommended
Maximum
Concentration
O
2
Oxygen ≥ 18% VOL 18% VOL ≤ 22% VOL
CO Carbon Monoxide ≥ 100ppm 250ppm (100ppm) ≤ 400ppm
H
2
S Hydrogen Sulphide ≥ 15ppm 25ppm (15ppm) ≤ 85ppm
CO
2
Carbon Dioxide ≥ 0.5% VOL 2% VOL (1%) ≤ 2% VOL
SO
2
Sulphur Dioxide ≥ 10ppm 10ppm ≤ 16ppm
CH
4
Methane
[ATEX] 2.2% VOL [ATEX] 2.2 % VOL [ATEX] ≤ 2.2% VOL
[UL] 2.5% VOL [UL] 2.5% VOL [UL] ≤ 2.5% VOL
C
4
H
10
Butane
[ATEX] 0.7% VOL [ATEX] 0.7% VOL [ATEX] ≤ 0.7% VOL
[UL] 0.6% VOL [UL] 0.6% VOL [UL] ≤ 0.6% VOL
C
3
H
8
Propane
[ATEX] 0.85% VOL [ATEX] 0.85% VOL [ATEX] ≤ 0.85% VOL
[UL] 1.05% VOL [UL] 1.05% VOL [UL] ≤ 1.05% VOL
C
5
H
12
Pentane
[ATEX] 0.55% VOL [ATEX] 0.55% VOL [ATEX] ≤ 0.55% VOL
[UL] 0.75% VOL [UL] 0.75% VOL [UL] ≤ 0.75% VOL
C
2
H
2
Acetylene
[ATEX] 1.15% VOL [ATEX] 1.15% VOL [ATEX] ≤ 1.15% VOL
[UL] 1.2% VOL [UL] 1.2% VOL [UL] ≤ 1.2% VOL
C
2
H
4
Ethylene
[ATEX] 1.15% VOL [ATEX] 1.15% VOL [ATEX] ≤ 1.15% VOL
[UL] 1.35% VOL [UL] 1.35% VOL [UL] ≤ 1.35% VOL
NH
3
Ammonia ≥ 50ppm 50ppm ≤ 85ppm
N0
2
Nitrogen Dioxide ≥ 10ppm 10ppm ≤ 17ppm
NO Nitric Oxide ≥ 50ppm 50ppm ≤ 85ppm
Contents
Exit
Prologue
Set-up
Operation
Service and
maintenance
Specification
Warranty
Unpacking
Contacts
Troubleshooting