Everyone:
I am having a problem with pulse instability on our 500 MHz VNMRS
system. I have not been able to find anything wrong with the
console. It appears to me that it is being caused by vibrations. I
can see vibrations next to the water signal on the autotest
sample. Changing the air flow changes the intensity of the
vibrations. It seems to me that the upper barrel and probe are
vibrating and the sample is jumping around. I have adjusted the air
flow settings until I am just about crazy. I have these problems
with both of my probes, although one is worse than the other.
Does anyone know if this can be caused by the upper barrel?
If anyone has any thoughts on this please let me know.
Thanks,
Susan Nimmo
Susan L. Nimmo, Ph.D.
NMR Facility Manager
Department of Chemistry and Biochemistry
University of Oklahoma
620 Parrington Oval, Room 208
Norman, Oklahoma 73019
office: 405-325-0677
cell: 405-627-7044
lab: 405-325-2843
Received on Fri Nov 07 2008 - 11:58:21 MST