UW CHEMISTRY NMR
Announcments & Equipment Logs
AV500 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 AV500 instrument by submitting an entry using the “Post Log Entry” box found below.
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269 Responses to “AV500 Log Book”
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Edte took more than 20 min from 298 to 323K and unstable. Wobb unstable; matching couldn’t be brought down. Lock on control borad showed L. Power one time.
Peak shape continues to be asymmetric for all spectra.
Lineshape has been poor for all my spectra in the past few days. TopShim runs successfully, but I suspect this may be another situation in which shims are not actually being adjusted.
Not locking on CD3CN
When changing the temperature in EDTE the instrument will not heat up. It says that the probe heater is at 20% but the temperature is continually falling. Tried logging off and back on and even tried another log in all together and nothing worked. Also getting poor shims with topshim.
Initially sample wouldn’t register as being down. Ejected and caught sample before high gas flow launched it upwards. Instrument will recognize that dummy sample is down, but after trying to inject my sample again, instrument will now not eject sample.
Topshim failed. Like previous users, error said too many points were lost during fit.
Topshim failed. Like previous users, error said too many points were lost during fit.
Error when running topshim that too many points were lost during fit.
Have been getting bad shims when using topshim and very difficult to get good shims manually