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2
Cryogenic Operation
Preparing for Cryogenic Operation
C A U T I O N
Connect the CCC transfer arm (stinger) to the probe
18
The Agilent Cold Probe must have all pneumatics attached
and electrical cables connected in preparation for running
NMR experiments. If multiple Agilent Cold Probes are on the
system, the correct temperature control calibration must be
loaded (see
"CryoBay Controls - Loading Files"
Refer to the Agilent Cold Probe Installation manual before
continuing.
The Agilent Cold Probe may be cooled outside of the magnet,
using an optional removable probe accessory, allowing the
probe to be inserted into the magnet at a later point in time.
The transfer arm and vacuum line attachment to the Agilent Cold
Probe make it difficult to insert the probe into the magnet. Take
appropriate precautions to prevent accidental damage, including the
assistance of another person. For normal operation, begin
preparation for cryogenic operations with the Agilent Cold Probe at
room temperature in the magnet.
Verify that the side arm of the probe is firmly clamped
1
to the magnet using the side- arm support provided.
Slide the protective sleeve from the CCC bayonet fitting.
2
3
Inspect and, if necessary, replace or correct the following:
•
Inspect the probe side- arm's inner O- rings to be sure
that they are properly seated in their grooves and that
they are not damaged or cracked. Damaged or missing
O- rings can be replaced with Viton #114 replacements,
which are available from Agilent Inc. or local
distributors. Lightly vacuum grease the O- rings before
re- installing.
•
Inspect the stinger of the cryogenic transfer line for
dirt, moisture, or other foreign material; clean if
necessary.
•
Inspect the plastic bushing and replace it if it is
deformed (the curved face is toward the probe). If it is
missing, it may be lodged inside the cryogenic arm of
the probe.
on page 72).
Cryogenic Systems Operation
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