Dear Colleagues,
We had a power outage recently due to a thunderstorm. When we arrived
on site the batteries on the backup UPS had failed evidently so the
Cryoprobe warmed up.
There should have a sample in the cryoprobe at the time as nobody
removed the sample. The strange thing is that the sample was there:
(1) Nobody claimed to have ejected the sample out, but the
moving transfer slider tube was not on the magnet side (we installed
an autoimatic SampleCase, but no sample protection device)
(2) No sample was ejected out either after power recovery
(3) Plus, a new sample can be inserted and spun up (it should
be impossible is there is another spinner inside). After cooling down,
no problem for lock, shimming, and running experiments.
What I worried about first is that the sample was lodged or wedged in
the probe, but now I felt confused. Is there any one met similar
situation before and would like to share your experience?
Thank you very much for your help in advance.
Banghao
--
Banghao Chen, Ph.D.
Interim Director of NMR Facility
Dept. Chemistry and Biochemistry
Florida State University
Tallahassee, Fl 32306-4390
(850) 644-3334 (CSL office)
(850) 644-5586 (DLC NMR-Lab)
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Dear Colleagues,
We had a power outage recently due to a thunderstorm. When we arrived
on site the batteries on the backup UPS had failed evidently so the
Cryoprobe warmed up. There should have a sample in the cryoprobe at
the time as nobody removed the sample. The strange thing is that the
sample was there:
(1) Nobody claimed to have ejected the sample out, but the moving
transfer slider tube was not on the magnet side (we installed an
autoimatic SampleCase, but no sample protection device)
(2) No sample was ejected out either after power recovery
(3) Plus, a new sample can be inserted and spun up (it should be
impossible is there is another spinner inside). After cooling down, no
problem for lock, shimming, and running experiments.
What I worried about first is that the sample was lodged or wedged in
the probe, but now I felt confused. Is there any one met similar
situation before and would like to share your experience?
Thank you very much for your help in advance.
Banghao
--
Banghao Chen, Ph.D.
Director of NMR Facility
Dept. Chemistry and Biochemistry
Florida State University
Tallahassee, Fl 32306-4390
(850) 644-3334 (CSL office)
(850) 644-5586 (DLC NMR-Lab)
-------------------------------------------------------------------------
Sent via webmail for Chemistry & Biochemistry _at_ Florida State University
https://webmail.chem.fsu.edu
Received on Wed Jul 20 2011 - 07:17:36 MST