3 restrictions of use, 4 hazards in the event of intended use, Restrictions of use – INFICON Helium Leak Detector Modul1000 User Manual
Page 12: Hazards in the event of intended use, Danger

2-2
Important safety instructions
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2.3
Restrictions of use
2.4
Hazards in the event of intended use
Before installing the Modul1000, carefully read all safety instructions and make sure
that you have properly understood them.
Danger
STOP
Danger
Danger of fatal injuries due to explosion.
Switch on and operate the Modul1000 only outside of explosive areas.
STOP
Danger
Risk of dangerous gases.
The device is not suitable for caustic, toxic and explosive substances.
Only use this device for detecting harmless substances.
STOP
Danger
Danger of fatal injuries due to explosion.
When explosive gases are used as test gas, the gas container could explode.
Avoid flames and sparks, keep ignition sources far away from the device.
STOP
Danger
Danger of fatal injuries due to electric shock.
Keep the sniffer tip away from live parts.
STOP
Danger
Danger of fatal injuries due to electric shock!
Connect the Modul1000 properly with the 3-core power cable and then connect the
PE-line to earth.