Safety information for the system owner
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A.1-23
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syngo MR D13
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Refilling helium
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The magnet is filled with liquid helium as a coolant. Following
installation, it is adjusted to the desired operating field strength.
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During normal operation, the magnet does not lose helium.
Under special conditions - power failure, malfunctions of the
cold head and maintenance activities - liquid helium must be
refilled by Siemens Service.
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When filling the magnet with helium, perform the necessary
tasks carefully and accurately, observing all regulations. Wear
protective clothing to prevent frostbite.
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Helium-related risks
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Liquid helium presents the following properties that, among
other things, may result in hazardous conditions when not han-
dled professionally:
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■ Extremely cold: causes frostbites when it comes in touch
with skin
■ Oxygen in ambient air is displaced during boil-off: risk of
asphyxiation
If the helium fill level is too low, the alarm box or the syngo
Acquisition Workplace will signal this accordingly.
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◆ In case of alarm, notify Siemens Service and/or ensure refill-
ing only through trained and experienced personnel.
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