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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I wanted to change my end time to 8:10, as i was done with my time and didn’t need the additional 10 minutes. It was 8:05 and i could not change the end time due to an error message. “Request exceeds maximum time allowed during walk on time”. I did not use the time from 8:10-8:20.
the following error occured when i tried to get a carbon “zg” : “Error in copmem; – cannot send command to coprocessor (timeout: flag=1). Check for bad RCU/TCU or crashed startd on CCU”
The following error occurred during rga and zg: “no points acquired during last scan !! (digitizer ok?)”. Dummy sample appears to be nearly all evaporated as well.
WOBB curve was weirdly squiggly (Like a sine curve along the usual parabola) during tune and match. Resultant spectra showed really poor line shape.
zg and rga returned errors and did not complete acquisition three times. On the third time a spectrum was collected and the line shape/splitting was frankly terrible.
All previous files were absent from the computer downstairs. Following the acquisition of a spectrum, it was not saved to U-Drive and is only present on the computer downstairs.
Carbon NMR line shape and general look of spectra is not acceptable. Same samples run on AV300 give nice spectra. This has been noticed by two members of my lab.
Also log book does not log comments upon first entry and requires retyping all information after re-logging in.
HNMR shims are atrocious even though “topshim” is successful.
wobb: aborted due to error
wobble signal too weak with RG=46341.0
The following error occurred while running several measurements using spooler,
Error in copmem:
-cannot send command to coprocessor (timeout:flag=1). Check for bad RCU/TCU or crashed started on CCU