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CB / CB-UL, CBF / CBF-UL (E7) 07/2021 Page 75/197
7.4 Safety instructions for setting high gas concentrations
Notes on handling carbon dioxide (CO
2
)
Carbon dioxide (CO
2
) in high concentrations is hazardous to health. It is colorless and almost odorless and
therefore practically imperceptible. Vent out any CO
2
gas that may escape via good room ventilation or a
suitable connection to an exhaust system. We recommend installing a CO
2
warning system.
DANGER
Danger of suffocation and poisoning by high concentration of CO
2
(> 4 Vol.-%).
Death by suffocation.
∅ Do NOT set up chambers in non-ventilated recesses.
Ensure technical ventilation measures.
Observe the relevant regulations for handling CO
2
.
Close the CO
2
supply when decommissioning the chamber.
If CO
2
is released, leave the area und inform the security service or fire department.
Chamber with O
2
control: Notes on handling oxygen (O
2
)
Oxygen (O
2
) is colorless and almost odorless and therefore practically imperceptible. It promotes burns,
which can proceed explosively. There is a fire hazard for flammable oxygenated materials, e.g. clothes and
hair. O
2
is heavier than air and may accumulate in low-lying areas.
DANGER
Danger of fire and explosion through contact of combustible materials with O
2
with high concentration of O
2
(> 21 % O
2
).
Serious injury or death from burns and / or explosion pressure.
∅ Do NOT set up chambers in non-ventilated recesses.
Ensure technical ventilation measures.
Observe the relevant regulations for handling O
2
.
Close the O
2
supply when decommissioning the chamber.
Take appropriate measures to prevent oxygen enrichment and fire and explosion hazards in areas where
oxygen enrichment is possible.
Observe the general information for safe handling of oxygen (chap. 1.8).
Chamber with O
2
control: Notes on handling nitrogen (N
2
)
Nitrogen (N
2
) in high concentrations is hazardous to health. It is colorless and almost odorless and therefore
practically imperceptible. Any N
2
gas that may escape must be safely led out via good room ventilation or
a suitable connection to an exhaust system.
DANGER
Risk of suffocation through high concentration of N
2
.
Death by suffocation.
∅ Do NOT set up chambers in non-ventilated recesses.
Ensure technical ventilation measures.
Observe the relevant regulations for handling N
2
.
Close the N
2
supply when decommissioning the chamber.
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