UW CHEMISTRY NMR

Announcments & Equipment Logs

AV500 – UPDATE : THE INSTRUMENT IS NORMAL AGAIN !

The Lock resonance was set to a wrong Field value leading to no observable signal even though all the indications would have made you feel that there is no hardware problem anywhere.  The problem is rectified and you shouldn’t have any issues with acquisition.  If anyone is curious to learn more on the problem, please […]

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AV300: Tune and Match restored

The av300 tuning has been restored. Users must always and only use the tune tool when tuning and matching any probe! This is especially important on the BBI probes. Please also only apply pressure vertically and never at an angle.

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ATTENTION : DRX499 – USERS’ COOPERATION NEEDED

As we all know, the DRX499 magnet takes involved effort to shim up to get usable lineshapes.  Duration of 24 hours or more for shimming all the 28 shims is not uncommon.   All this effort gets wasted when users inadvertently turn the wrong ‘knob’ under the magnet while they are trying to tune and match […]

Posted in Hardware, Spectrometer, Uncategorized, Usage | No Comments

AV301 : ALERT – PROBE CHANGE THIS FRIDAY

The BBI probe will be replaced with the TXD-19F {1H} probe by the afternoon of this Friday, the 17th.   After the calibration steps the instrument should be ready for regular use around noon of Saturday, 18th April.  Further updates will be posted in this space.

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ALERT : AV700 – ISSUES WITH SOLIDS NMR

We are currently investigating a sample handling problem with the solids state NMR probe.  It is likely that the remedy might take a long time.  In such a case the instrument will return to solution NMR operation mode and I will post an update on the same, when that happens.

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DRX499 : UPDATE – LOGIN SYSTEM RESTORED FULLY

All UWNetid-s should function normally now.  Please let us know if you notice otherwise.    

Posted in Host Computer, Operating System | No Comments

DRX499 – USER LOGIN PROBLEM

Some of you might see your UWNetid login is not working on this instrument and we are aware of the problem.  As we speak we are looking into it and an update will be posted once this is resolved.    

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AV500 – GRADIENT ASSISTED SHIMMING – Topshim program

Many of you might be aware that the AV500 console acquired the ability to do fully Automatic shimming using the Topshim program from within Topspin.  The system uses either 1H or 2H NMR resonance signals to accomplish this along with gradient coils placed in the NMR probe.  This means that no matter which lock solvent […]

Posted in NMR Applications, Usage | No Comments

UPDATE : AV700 – PROBE CHANGE – SYSTEM TO SWITCH TO SOLIDS on April 1st, Wednesday

All users and especially Solutions NMR users should note that the AV700 system will be switched to Solid State NMR operation beginning April 1st, Wednesday.  The system is expected to perform MAS  NMR data collection for about 8 weeks.    Those of you who are interested to explore solid state NMR  should contact Adrienne Roehrich for […]

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AV500 : ALERT : LOW VT SYSTEM NOT AVAILABLE

The LN2 evaporator assembly cracked open and it is being repaired as we speak.  Till that is ready,  users won’t be able to do a low VT run which requires LN2 evaporation.  We will post an update as soon as the system is operational in this regard.

Posted in Hardware, Spectrometer | No Comments

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