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P2.x ATEX
5 Operation and control
NOTICE
The device must not be operated beyond its specifications.
DANGER
Danger of explosions, danger of poisoning from poisonous corrosive gases
During maintenance work, depending on the medium used, explosive and/or poisonous
corrosive gases could escape, and this could lead to a danger of explosion or could be
hazardous to health.
a) Inspect the leak tightness of your sampling system before putting the device into op-
eration.
b) Ensure that gases that are hazardous to health are discharged safely.
c) Turn off the gas supply before beginning any maintenance or repair work and flush
the gas lines with inert gas or air. Secure the gas supply so that it cannot be turned on
unintentionally.
d) Protect yourself during maintenance from poisonous / corrosive gases. Wear appro-
priate protective equipment.
DANGER
Adiabatic compression (explosion hazard)!
In case of adiabatic compression, high gas temperatures may occur. The operator is re-
sponsible to consider this situation.
Make sure to obey the allowed technical specifications and ambient conditions (see data
sheet), take special attention to the media temperature with respect to temperature
class T3 or T4. These vary in addition to gas composition and ambient conditions. Where
necessary, the operator must install temperature sensors for monitoring and must auto-
matically shut down the sample gas pump should the temperature exceed the limits.
DANGER
Dangerous electrostatic charge (explosion hazard)
Transporting materials such as very dry, particle-loaded gases can cause incendive elec-
trostatic charges in the bellow / pump body.
Install particle filtration with the appropriate fineness upstream from the pump gas in-
put. For the P2.x ATEX-O2 versions in particular, we recommend a filter fineness of
<10 µm.
DANGER
Diffusing pumped media
Explosion hazard! Formation of explosive atmosphere due to escaping flammable gases.
When operating the sample gas pumps with media that tend to diffuse strongly, such as
hydrogen (H
ently technically leak-proof due to their design. To ensure safe operation, the official reg-
ulations for installation and operation must be observed. In addition to regular leakage
checks, suitable technical measures such as gas monitoring devices, technical ventila-
tion, etc. must be provided depending on the installation situation.
CAUTION
Hot surface
Burning hazard
According to the product type and operation conditions, the temperature of the housing
may exceed 50 °C during operation.
Depending on the conditions at the installation site it may be necessary to provide these
areas with appropriate warning signs.
BE420002 ◦ 07/2024
) in high concentrations, it is essential to note that these are not perman-
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Bühler Technologies GmbH
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