41
ZTKS0164 / Z31949 / 06
Troubleshooting
Table continued
a. This work requires to remove the bottom plate. Before removing the bottom plate
check that the suspension tubes of the helium vessel are not broken. Install the safety
device for fall protection (not supplied). Contact Bruker Service for further information.
Indicator Possible reason Solution Performed by
Vacuum valve is
touching the
magnet stand.
Vacuum valve
mounted
incorrectly.
Reposition the vacuum
valve.
Bruker Service
Vacuum in RT
vessel does not
reach
5 x 10
-5
mbar
within 48 hours.
O-rings may be
damaged.
Check and clean O-rings
and slots. If necessary,
replace the O-rings for
• the vacuum valve
• the drop-off plate
• the reduction and
sealing flanges
• the bottom plate
a
.
Bruker Service
Defective pumping
unit or pumping
line.
Check pumping unit and
pumping line:
A vacuum of at least
10
-6
mbar must be reached
while the sealing plug is
closed.
Replace if necessary.
Bruker Service
Room temperature
bore has scratches
or dust on the
sealing surfaces.
Check sealing surfaces on
the RT bore: No scratches
and no dust should be
visible.
Bruker Service
Moisture in the RT
vessel.
Use dry N2 gas to pump and
flush the RT vessel.
Bruker Service
Super insulation is
touching the RT
vessel or the RT
bore or the
radiation shield.
Super insulation
was not attached
correctly during
assembling.
Attach the super insulation
on the outer radiation shield
using polyester tape
a
.
Carefully prevent any
contact of the vessels or the
RT bore in the cryostat.
Bruker Service
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