Interconnect the He Compressor
CryoProbe Installation BRUKER 43 (93)
Interconnect the He Compressor 3.16
0
The following section was partially adapted from the He Compressor operation
manual which is delivered with the CryoPlatform.
CAUTION: Lay all tubes and cables such that they don’t cross the floor on a walk-
way. If a crossing cannot be avoided, bury or cover them.
Necessary tools:
z.10 Lay the He Hose to the CryoCooling Unit such that it does not cross the
floor on a walkway. If a crossing cannot be avoided, bury or cover the
He Hose.
Attach the He Hose steel wire at intervals of about 1 m firmly to the
wall or to the floor.
WARNING: Avoid the use of magnetic materials or tools inside the
0.5 mT stray field of the magnet.
z.11 Make sure that connector on the He Hose is clean before connecting it
to the CryoCooling Unit back panel. Use two wrenches at the hose’s
two terminal hexagon nuts for attaching it. When a tight connection has
been established, unlock the connectors by ~1/8 turn to facilitate later
changes.
z.12 Lock the steel cable loop in the hook that is provided at the CryoCool-
ing Unit backpanel.
z.13 End of 1st leak test:
Check the pressure on the He Regulator’s pri-
mary gauge. If the pressure has dropped in the meantime, the connec-
tion between He Regulator and He steel-cylinder needs tightening.
z.14 Open the He steel-cylinder main valve by ~one turn.
z.15 Open the He Regulator slowly such that a secondary pressure of 22-
25 bar builds up. Do not overshoot this pressure. The pressure cannot
be reduced by closing the He Regulator because the He cannot escape.
IMPORTANT: Never exceed 30 bar - the gauge would be damaged!
If 25 bar were exceeded significantly, close the He Regulator. Discon-
nect the He Hose from the CryoCooling Unit and terminate it with the
Dump Tool to release the trapped He. Re-connect the He Hose to the
CryoCooling Unit and repeat step z.15
.
z.16 2nd leak test:
Close the He steel-cylinder main valve. Mark the second-
ary pressure on the gauge and check again later. Within the first ½ h,
the pressure might drop a little but it must not decrease thereafter.
NOTE: The 2nd leak test will be terminated in "Interconnect the He
Compressor" on page 44, step i.12 below.
To Next Page
Loading...
Need help?
General
