UW CHEMISTRY NMR

As far as the tests could show, the lock system is behaving as expected.  We shall keep a close watch, nevertheless. It is possible that the warmer than usual room temperature in the lab could have led to overheating of one of the circuit boards in the lock system leading to the sporadic instability reported.  […]

Some of the users complained that they could not lock properly on DRX499.  I will be testing the behavior today and post an update. Unless the fix is a simple/routine one, not much will happen today other than the observation. Depending the severity of the issue, we might interrupt the schedule next week to address […]

While the ATMA probe is being repaired, we will use the broadband BBO probe, that needs to be tuned and matched by hand ! This probe does not have gradient.  Therefore, NO TOPSHIM. You have to shim by hand. If you need assistance to readjust to the new reality, please contact Adrienne or myself. NMR […]

The system is down currently as the 1H channel of the ATMA probe is not functional. We are in the process of installing a back up probe and update the user base once it is ready for use. PLEASE NOTE : THE BACKUP PROBE WILL HAVE TO BE TUNED/MATCHED BY HAND – USING ‘wobb’ COMMAND.  […]

Users can start reserving time right now.  The system has the TXO-13C,19F {1H} -Z gradient probe shimmed up and calibrated. IMPORTANT : Please make sure you start “edte” and check that the temperature is stable at 298 K.  DEFAULT Shims : USE “rsh stdtxo” STANDARD pulses/power levels :  USE “getprosol” Please ask, if you have […]

A power supply failure is identified in one of the main components of the spectrometer and being looked into. This problem is unrelated to the probehead issue we were investigating.  As of now I can’t give a clear estimate of the down time but I hope to update the situation before the end of today. […]

Both RF as well as gradient sections need to be inspected/serviced to bring the instrument back to optimal condition. Some of these issues have been pending to be addressed and it is past due to get to these. Thank you for your patience and understanding. I expect the instrument to be back in operation by […]