Warning labels
CryoProbe Installation BRUKER 45 (93)
Warning labels 3.17
0
Stick a warning label (Figure 3.13.
) on all mobile units of a CryoProbe System
that contain magnetic materials and could be attracted by the NMR magnet.
i.6 If the He Compressor requires water-cooling, connect it to the in-house
cooling water cycle or to the optional water chiller.
NOTE: The installation of the water cooling system is not subject of this
manual.
Turn on the water and check for leaks.
i.7 If the He Compressor was not already hooked-up to its 3-phase mains,
check that the M
AIN POWER SW on the He Compressor back and DRIVE
on the front are O
FF before establishing this connection.
i.8 Plug the 4-pin Coldhead power cable into C
OLD HEAD POWER on the
CryoCooling Unit and C
OLDHEAD JC on the He Compressor.
CAUTION: Never connect the Coldhead cable between He Compressor
and Coldhead while the He Compressor is energized.
i.9 Connect the cable Z13883/Z14323 from the CryoCooling Unit to
E
XTERNAL JR on the He Compressor. Set the REMOTE DRIVE at the He
Compressor back to E
XT position.
CAUTION: The C
OLDHEAD DRIVE switch is for maintenance purpose
only and must be O
FF at all times. Do not touch it during normal opera-
tion. An accidental switch to O
N may cause severe damage to the Cold-
head within a few hours.
i.10 Note down the values from the hour meters on the He Compressor
front and the CryoCooling Unit back.
i.11 CAUTION: Ensure that the M
AIN POWER and DRIVE switches on the He
Compressor back and front, respectively, are O
FF before connecting the
He Compressor unit to mains.
Plug-in the He Compressor but do not switch it O
N yet.
i.12 End of 2nd leak test:
Check on the He Regulator low pressure gauge if
the secondary pressure has remained stable, i.e. if there is no leakage
between the He Regulator and the He entry valve inside the CryoCool-
ing Unit.
i.13 Open the He steel-cylinder main valve by ~one turn.
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