Crowcon Q-Test, Руководство пользователя и оператора

Страница: 19 / 30

19
2.8 Test Gas Requirements
For each type of gas test that can be undertaken by Q-Test; speedy bump; smart bump and
calibration after bump fail, Crowcon recommend the following gas levels.
Care should be taken to ensure Gas-Pro is configured correctly such that the gas levels applied are
suitable for the test to be undertaken, the configuration can be verified via Portables Pro. If Gas-Pro
is not configured correctly for the gas to be applied, then the test will not be successful.
2.8.1 Speedy Bump Recommended Gas Levels
Table 1
shows the recommended minimum and maximum concentration of gas suitable for a Gas-
Pro configured to undertake a speedy bump test when inserted into a Q-Test.
Table 1
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
C
2
H
2
Acetylene ≥ configured alarm level 1 threshold
[ATEX] 0.55% VOL
[UL] 0.75% VOL
C
5
H
12
Pentane ≥ configured alarm level 1 threshold
[ATEX] 1.15% VOL
[UL] 1.2% VOL
C
2
H
4
Ethylene ≥ configured alarm level 1 threshold
[ATEX] 1.15% VOL
[UL] 1.35% VOL
NH
3
Ammonia ≥ configured alarm level 1 threshold ≤ 85ppm
Contents
Exit
Prologue
Set-up
Operation
Service and
maintenance
Specification
Warranty
Unpacking
Contacts
Troubleshooting