Positioning the units
CryoProbe Installation BRUKER 21 (93)
Positioning the units 3.6
0
WARNING: Avoid magnetic transport aids when moving the CryoCooling Unit to
its position inside the magnet’s 0.5 mT stray field. Even heavy equipment like a
pallet truck may be attracted and cause fatal damage.
Table 3.1. Position the units
step action
p.1 Place all units in the laboratory as agreed on during site planning:
CryoCooling Unit with He Transferline, Transferline Support, He Com-
pressor, and optional water chiller & radiator.
Install the He Compressor on a level surface. Two of its four casters
should be locked.
Provide extra space around the units as required for connections,
ventilation, and service (details are given in the CryoProbe System Site
Planning Guide).
p.2 NOTE: Orientation of the Transferline Support: the screw fixture of the
vacuum tube must face the CryoCooling Unit.
Connect the shorter vacuum tube from the Transferline Support to the
vacuum port at the CryoCooling Unit front, right below the He Transfer-
line outlet.
NOTE: On the earliest CryoCooling Units, the vacuum port is not acces-
sible from outside. Open the cabinet (see "How to open the CryoCool-
ing Unit" on page 67) and connect the longer (!) vacuum tube to the
port inside.
p.3 Lock the He Transferline to the Transferline Support with the four big
screws.
p.4 Adjust the positions of CryoCooling Unit and Transferline Support such
that the He Transferline will easily fit into the CryoProbe when bent by
100°-140° (the bending is needed because it reduces the transfer of
vibrations to the magnet). Consider that the tip of the CryoCoupler will
be located about 10 cm away from the magnet’s symmetry axis when
connected inside the CryoProbe.
NOTE: The heavy inner frame of the CryoCooling Unit rests on three
feet. Thus, it needs no balancing. The four feet in the corners are not
intended to actually touch the floor. They just add security against top-
pling and need no adjustment.
p.5 Put the dark-grey basement cover to the CryoCooling Unit front bot-
tom.
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