Bruker NMR CASE, Руководство по устранению неисправностей

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Sample Insert (down) Problems
NMR Case
Trouble Shooting Guide
BRUKER Page 6 of 15
2.4 Too much sample lift air flow
If the sample lift airflow is excessive large, then the sample is not inserted rapidly into the BST as described in 2.2 above,
despite the open bypass exit hole. The samples may get stuck on top of the BST.
Reduce the sample lift airflow.
See section 1.1 of this manual on how to adjust the sample lift airflow for a good sample lift within 10 seconds.
If the sample lift airflow needs to be excessive large, then check section 1.2 and 1.4 for possible faults.
2.5 Sample holder tray does not advances firmly
The sample holder tray must advance with some speed and should be stopped firmly in the next position. If the sample holder
tray just creeps forward slowly and hesitantly, then the next openings for the sample may not be aligned properly and the
sample may get stuck. Although the NMR Case is factory adjusted, this specific adjustment is air pressure dependent and
therefore may need some tweaking at the installation site.
Check that the bottom of the sample holder tray is clean and free of foreign debris like sticky tape, glue from tape or staplers.
Check that the 3 white round plates located on the NMR Case base plate are clean and free of foreign debris like sticky tape,
glue from tape or staplers parts.
Switch off the motion controller and push the black pin on the side to the inside out of the way. Mount the sample holder tray
and check for smooth rotation by hand. It should not go easy, but with a constant force and without steps.
If the sample holder tray rotates smooth, then increase the airflow for the pneumatic piston by adjusting flow reducers # 4. It
is located underneath the NMR Case base plate, on a manifold (see Figure 3). Use a small screwdriver and turn the
adjustment screws counter clockwise (CCW) out by quarter turn increments. Check for the firm advancement and turn further
out if necessary. If there is no change in the sample holder tray advancement, then turn flow reducer # 3 out counter
clockwise (CCW) by quarter turn increments as well.
However the airflow should not be increased too much or the sample holder tray will slam the sample tubes. See section 5 of
this manual.
2.6 Alignment of the adapter collar, seal ring and brown interface tube.
Check the alignment according section 1.6 of this manual
2.7 Interface tube inside the adapter collar
Check it according section 1.8 of this manual.