Caution Notices - Agilent Technologies Cryogenic User Manual

WA R N I N G

Caution notices

C A U T I O N
C A U T I O N
Cryogenic Systems Operation
magnet must be supported by at least one of two methods:
with ropes suspended from the ceiling or with the
antivibration legs bolted to the floor. Refer to the
Installation Planning Manual for details.
Do not remove the relief valves on the vent tubes.
The relief valves prevent air from entering the nitrogen and
helium vent tubes. Air that enters the magnet contains
moisture that can freeze, causing blockage of the vent tubes
and possibly extensive damage to the magnet. It could also
cause a sudden dangerous release of nitrogen and helium
gases from the dewar. Except when transferring nitrogen or
helium, be certain that the relief valves are secured on the
vent tubes.
Observe the following precautions during installation,
operation, maintenance, and repair of the instrument.
Failure to comply with these cautions, or with specific
cautions elsewhere in Agilent manuals, violates safety
standards of design, manufacture, and intended use of the
instrument. Agilent assumes no liability for customer failure
to comply with these precautions.
Keep magnetic media, ATM and credit cards, and watches outside
the 5-gauss perimeter from the centerline of the magnet.
The strong magnetic field surrounding a superconducting
magnet can erase magnetic media such as floppy disks and
tapes. The field can also damage the strip of magnetic media
found on credit cards, automatic teller machine (ATM) cards,
and similar plastic cards. Many wrist and pocket watches are
also susceptible to damage from intense magnetism.
Refer to the manuals supplied with the magnet for the size
of a typical 5- gauss stray field. This gauss level should be
checked after the magnet is installed.
Check helium and nitrogen gas flow meters daily.
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Introduction
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