i like this post (click again to cancel)
i dont like this post (click again to cancel) remove favorite mark from this question (click again to restore mark)

Hi everyone,I have problem on Bruker AV-500 in runing topshim. when I run topshim it give error that during raw check z gradient not found has any body idea where is the problem.

asked Aug 07 '12 at 06:36

feroon's gravatar image


Hi, I am experiencing the same problem. Did you find a solution in the end? I have tried ii, shmrm, restarting the console and so on. Nothing works. How did you solve it? - jen (Nov 07 '13 at 04:29)

2 Answers:
i like this answer (click again to cancel)
i dont like this answer (click again to cancel)

Bruker gradient connectors at the rear of the gradient amp and the inline filter are often not fully engaged. Check to be sure that the connector shells are screwed in completely by pushing firmly on the connector while turning the shell until it is all the way in.


answered Aug 14 '12 at 09:17

Jerry%20Hirschinger's gravatar image

Jerry Hirschinger

i like this answer (click again to cancel)
i dont like this answer (click again to cancel)

Hi Feroon,

Usually this means that for some reason the z gradient is not working, which could be for a number of reasons. If you run a gradient 2D, does the experiment work? Do you see the lock signal dip due to the gradient pulses?

If the gradient doesn't do anything in a 2D, try the command "ii" in topspin and repeat the experiment. If it still doesn't work, then try turning the console off and on again.



answered Aug 07 '12 at 12:51

Pete%20Gierth's gravatar image

Pete Gierth

Thanks for reply Pete In 2D gradient is not working but experiment is still work with a lot of artifact peaks.FID is not good too and lock signal is not going in like a gradient. I have turn off and on console already but the problem is still there. - feroon (Aug 08 '12 at 05:59)

If you have another gradient probe, try it. That will isolate the problem to the probe or the spectrometer. You can also measure the resistance of the gradient coil at the connector. It should be on the order of 1 ohm. If open, the probe needs repair. If about 1 ohm, console is likely problem. - Kirk Marat (Aug 13 '12 at 12:18)

Your answer
Please start posting your answer anonymously - your answer will be saved within the current session and published after you log in or create a new account. Please try to give a good answer, for discussions, please use comments and please do remember to vote (login to vote)
toggle preview

powered by CNPROG