UW CHEMISTRY NMR
Announcments & Equipment Logs
AV300 Log Book
Welcome to the Chemistry NMR Online Log Book – your One Stop portal to communicate about the spectrometer to the Facility Staff in a timely manner.
Please record your comments and relevant observations about AV300 instrument by submitting an entry using the “Post Log Entry” box found below.
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305 Responses to “AV300 Log Book”
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The ATMA on 1H takes a long time to optimize (3-4 minutes), and the 31P takes much longer (I stopped it after 10 minutes).
ATMA on phosphorus is taking an extremely long time.
Wobb curve minimum won’t appear at any point in tuning range. Instrument can’t be tuned or matched.
Spectra are horrible where even the NMR solvent peak is jagged and and has shoulder peaks.
did lockdisp, rsh stdbbo. but shim won’t move.
also rga was going indefinitely so i had to stop it manually.
Wouldn’t wobb, and seemed to have issues shimming using the topshim command.
Won’t lock and shims don’t move.
ATMA is really slow and does not find a dip. Tried ATMM and Matching moves but Tuning does not respond.
ATMA won’t do anything. The graph never changes. Using ATMM also won’t change anything no matter how many times I click the arrows to move the center.
Same popup as Tori and Travis:
“Every first time I use the atma command, I get the error: ‘channel can’t be wobbled with this probe’ followed by ‘could not select probe channels’. The second time I use the atma command, the auto wobb works without any errors.”