UW CHEMISTRY NMR

Announcments & Equipment Logs

UPDATE ! AV500 – PROBE CHANGED TO TRIPLE RESONANCE – HCP

The BBI probe’s VT dewar is faulty, which most probably contributed to an over temperature event.  Since we have to wait for the replacement part to arrive (might be a couple of weeks), the following probehead has been placed and optimized for regular use : TXI – 1H {13C, 31P) – XYZ gradient This probe […]

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UPDATE ! AV301 : SYSTEM IS BACK IN ACTION

Pneumatics system is fixed and working properly.   Ready for regular use. NMR Facility Manager 9/26/17

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ALERT ! AV500 – SYSTEM DOWN DUE TO VT MALFUNCTION

A runaway VT system has overheated the sample space and the system needs time to recover to normal temperature range.  We are also investigating the cause of this.  Until further notice, the system is not available for regular use.  Updates will be posted as and when we get more information to report. Thank you for […]

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ALERT ! AV301 : PNEUMATICS MALFUNCTION

Sample Eject and Spin is not functioning and initial troubleshoot points to a problem within the Pneumatics controller.  Until the unit is revived the spectrometer cannot be used.  Please stay tuned for further updates. NMR Facility Manager 9/25/17

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UPDATE : AV300 : BBO MANUAL PROBE OPERATIONAL – this is a back up probe

While we are fixing the ATMA probe,  we have provided a surrogate broadband probe in AV300 for routine runs.  Please note that, the default shims provided may not be the best to just run spectra out of the box.  You have to touch up the low order shims by hand to get decent spectra. We […]

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UPDATE : AV300 : ALTERNATE PROBE IS BEING READIED

We are working with the manual BBO probe to make it optimal for regular use.  In parallel, the ATMA probe repair will be expedited so that we can get back to automated operation with minimal disruption to that routine. Thank you for your understanding NMR Facility Manager 9/21/2017

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UPDATE : AV301 : VT CONTROL UPTO 0 DEG C POSSIBLE NOW.

Some of you might have noticed that the sample temperature cannot be lowered below ambient on AV301.  The heat exchanger a.k.a. chiller that makes this possible, is now serviced and working as expected. This gives you the choice to run lower than RT experiments upto 273 K max.  This implies that you must set the […]

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UPDATE ! AV500 – SYSTEM BACK TO NORMAL

All functioning as expected.  Please give us a feedback, when you notice abnormal behavior. Thank you NMR Facility Manager 9/18/2017

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ALERT ! AV300 – IMMINENT PROBE CHANGE

The ATMA probe is seen to have issues while tuning/matching the 1H channel.  All symptoms point to the necessity for the probe to be pulled out and serviced, soon.  I am giving the heads up now that this probe might come out at a short notice on one of the days this week and a […]

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UPDATE ! AV500 – SYSTEM WILL BE UNUSABLE FOR NOW

Faulty channel 3 is not yet operational and available options are being explored.  If a part replacement is on the cards, we may have to wait a few days. In such an eventuality, I will release the instrument with the caveat that we have to shim the sample by hand, as in good old days. […]

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