The adapter collar does not fit to the shim stack
NMR Case
Trouble Shooting Guide
BRUKER
Page 10 of 15
7. The adapter collar does not fit to the shim stack
One adapter collar for a shim upper stack type BST is included with every NMR Case.
For shim stacks other than of type BST, different adapter collars can be ordered and mounted to the NMR Case base.
Read and follow the NMR Case system requirement manual P/N B2928, section 6.
8. The NMR Case does not fit.
Read and follow the NMR Case system requirement manual P/N B2928, section 10.
9. The sample spin rate goes up to 150 Hz
Check the following to see if the problem goes away:
9.1.1
Unplug the spin rate cable connector at the BST shim stack. Check it and plug it back in.
9.1.2
Remove the BSMS sample control modifier cable B1428 (see instruction sheet B2300).
9.1.3
Check the spin rate settings.
10. Intermittent problems
The following 4 items need to be properly adjusted for a reliable long-term operation of the NMR Case.
Item
Necessary adjustments
Trouble Shooting Guide
1
NMR Case or magnet not leveled
Section 2.1
2
Sample lift air flow
Section 1.1 and 2.4
3
Sample holder tray movement
Section 2.5 or 5
4
Seating of collar and adapter tube
Section 1.8
