10 (93) BRUKER CryoProbe Installation
Safety
NOTE: If a pressure or vacuum leak appears, the CryoProbe System will be auto-
matically stopped and warmed up to ambient temperature.
Pressurized helium gas supply
WARNING: Move, connect, and operate the He steel-cylinder carefully. Obey all
safety precautions pertinent to high pressure gas containers and magnetic ob-
jects.
WARNING: The He steel-cylinder and its entire transport path must always be
outside the 0.5 mT range of the magnet.
WARNING: Fix the He steel-cylinder reliably to a wall. All local safety regulations
for the installation of pressurized gas systems must be obeyed.
The helium pressure hose between the He steel-cylinder and the CryoCooling
Unit carries a steel wire that must be fixed to the units at its ends. If crossing of
walkways cannot be avoided, the He Hose must be covered or buried. Moreover,
the He Hose must be fixed to a wall or to the floor once every meter.
WARNING: If the He Hose is not fixed it can whip around in case of a rupture.
WARNING: If a large quantity of helium gas escapes from the He steel-cylinder
during a short period, there is a danger of suffocation, particularly in small rooms.
Care for good ventilation and fresh air supply after an accidental release of large
quantities of helium gas.
Overpressure release noise
Overpressure in the system is avoided by software control and mechanical safety
valves. In case of malfunction of software as well as human interference into valve
settings, the release valves can open with an extremely loud bang! The sound
protection cabinet will reduce the noise to a safe level, therefore do not operate
with an open cabinet.
WARNING: If a service action on an open CryoCooling Unit cabinet cannot be
avoided while the He Compressor runs or while the helium gas supply is manipu-
lated, the ears must be protected.
Electrical safety
The CryoCooling Unit’s degree of protection against electrical hazard complies
with IEC IP20, i.e. all electrical parts are protected against touching.
WARNING: All electrical connectors must be used as supplied by B
RUKER. Do not
substitute them by other types.
No hazardous substances
There are virtually no substances in a CryoProbe System that could be hazardous
for an NMR user. See the CryoProbe Installation manual for materials that need
special consideration upon relocation or disposal.
Lifting the CryoProbe
WARNING: Two persons are needed to insert and remove the CryoProbe.
When kneeling down at the magnet bore, your body posture is not suited to lift the
heavy CryoProbe (~12 kg) on your own. For two persons it is very easy. Take
care not to injure your back!
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