UW CHEMISTRY NMR

Announcments & Equipment Logs

May, 2014

ALERT ! : DRX499 – SYSTEM DOWN – HARDWARE MALFUNCTION

The receiver amplifier is suspect and is giving rise to glitches along the spectral range. Some users had already reported the ‘wobb’ curve showing peculiar noisy features that is also traced to this cause.  The replacement/repair options of the board are being explored and we will try to fix this as soon as feasible.  Until […]

Posted in Hardware, Spectrometer | No Comments »

AV500 UPDATE : TOPSHIM AUTOMATIC GRADIENT SHIMMING READY FOR USE !

Topshim automatic shimming can be used now on all solvent types.  You can use the following two methods to access this feature : Type topshim gui and bring up the Topshim Graphical User Interface.  If you have correctly locked on the solvent, the system will automatically optimize shims based on your lock solvent.  You just […]

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AV301 : NOTE On PROBE CHANGE

Following the stuck sample tube incident, a troubleshooting attempt of the ATMA – PABBI probe led to an unfortunate damage to the probe and it is being sent to Bruker for repairs. This is the reason behind the hurried replacement in this instrument, with the TXO-19F {1H,13C} triple resonance probe.  If you have further questions […]

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AV500 – TOPSHIM – NOTE ON AUTOMATIC SHIMMING

There are still some pending calibration operations  with the TXO-19F probe that was put in yesterday and this makes the Topshim automatic shimming unusable currently.  As you may be aware, there’s been an impact on available NMR time due to probe issues on other instruments. To minimize this, we will keep using the TXO-19F {1H,13C} […]

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UPDATE ! AV500 – AVAILABLE WITH TXO PROBE

The av500 is now available with the TXO probe. This probe has 1H, 19F, and 13C capabilities with proton decoupling. It is a 5 mm probe, the same TXO you have used on the av500 in the past. Topshim is available on this console with this probe. Follow the instructions posted next to the workstation. […]

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UPDATE ! – AV301 AVAILABLE

The av301 is now available for reservation and use. It currently has the TXD triple resonance probe.

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UPDATE ! AV700 – FTP ACCESS TO FILES RESTORED

Those of you who noticed that the file trees are not appearing on the FTP server for AV700 should see this problem resolved now.  Please let me know, if it’s otherwise.

Posted in Datasets, Host Computer | No Comments »

UPDATE ! DRX499 – LOCK SYSTEM RESTORED

Users should be able to lock on the solvents as usual.  Please use the default shim file stdbbi and shim up at least the minimal lower order shims to get a good lineshape.

Posted in Hardware, Spectrometer, Usage | No Comments »

ALERT ! – AV301 : SAMPLE STUCK INSIDE THE MAGNET BORE

Until the user’s sample stuck inside the room tempearture bore of the magnet is removed, the instrument cannot be used.  Please wait for an update after the clean up to complete, before attempting to use the machine again.

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DRX499 Lock

Due to an issue with the lock on the drx499, experiments cannot be run on the instrument at this time. Reservations are restricted until the issue is resolved.

Posted in Spectrometer | No Comments »

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