Hi,
maybe a long shot: When you record a 1H spectrum using a large spectral window
(200+ kHz or so) with the lock switched off and the z0 field value set to 0,
does your spectrum appear at an SFO1 roughly corresponding to the frequency
mentioned in the first page of "cf" system config? If not then maybe the
magnet drifted away a bit and that frequency may need to be reset…
Cheers
Bert
> Am 01.05.2025 um 16:33 schrieb ter Horst, Marc A. via groups.io:
>
> Hi
> We are experiencing weird lock failures on our 600 MHz NEO system. The
> system will lock and topshim on a samples (in IconNMR) and then fail on a
> sample. This happens independent of solvent and is not due to low volume
> or ‘dirty’ samples. This was particularly challenging while
> attempting to run the lineshape sample. Locking and shimming worked on a
> H2O/D2O and a ethyl benzene/CDCl3 sample but would not run on the CHCl3/acetone-d6
> standard sample. We have reset the calibration in topshim.
> The PC (running Windows 11) is ‘running slow’. Sometimes it
> will take a second or two to complete a command in Topspin- even for getprosol.
> Occasionally, there is a minute delay while waiting for a ‘thread’ to finish.
> There is also an error installing the 'iqvw64e.sys' driver. Based on some
> discussion boards, people don't think this would affect operation.
> Not sure if this is an issue with our lock settings or calibration in Icon or
> is this some kind of PC/communication thing.
> Anybody experience similar issues?
> Marc
>
>
>
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Received on Fri May 02 2025 - 10:04:40 MST