Bruker Ascend 750'89, Manual

Page: 20 / 102

20 ZTKS0178 / Z31970 / Rev.: 03
Safety
Quench
Gas under Pressure
WARNING
Risk of suffocation during a quench of the magnet system.
A quench is the very fast de-energizing of the magnet by loss of its superconductivity.
The stored magnetic energy is converted into heat and thus large quantities of helium
evaporate. The evaporating helium will displace the breathing air. In case of not
sufficient ventilation this may result in death by suffocation.
Thus
• The magnet system site must be well ventilated. In case of doubt contact Bruker
Service.
• The evaporating gas may resemble smoke. Never pour water on the magnet
system.
WARNING
Risk of injury due to gas under pressure inside the cryostat and further
equipment.
The helium or the nitrogen vessel of the cryostat may get sealed off due to ice
formation inside the helium or the nitrogen turrets in case of non-compliance with the
instruction given in this manual. This may lead to overpressure and damage of the
helium or the nitrogen vessel.
Manipulations of components with gas under pressure may lead to injury and
property damage.
Thus:
• In case of icing inside the helium or the nitrogen turrets contact Bruker Service
immediately.
• Release the pressure to the recommended value before working on components
with gases under pressure.
• Do not seal cryogenic agent vessels of the magnet system or the transportation
dewars.
• Do not connect high pressure transportation dewars to the magnet system.
Completely eliminate the high pressure from the transportation dewars before
connecting and transferring cryogenic agents.