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Spectral scan issues
Posted: Tue Nov 13, 2012 4:25 am
by geigerjcjr
Spectral scan is a blob from mass 50 to around 500 after changing column and cleaning source. Any suggestions?
Re: Spectral scan issues
Posted: Tue Nov 13, 2012 12:17 pm
by Don_Hilton
what kind of instrument? GC/MS? LC/MS? Make and Model would help as well.
Re: Spectral scan issues
Posted: Tue Nov 13, 2012 1:25 pm
by geigerjcjr
HP GC/MS 5973. Changed to new source, changed EM, isolated column, looked for backstreaming of diffusion oil, loaded old tune thinking it may be a corrupt tune issue. Doesnt seem to be any of these. Gonna change HED and source assembly next. Any ideas would be appreciated.
Re: Spectral scan issues
Posted: Wed Nov 14, 2012 3:40 am
by Don_Hilton
Any history on this? Did this happen all at once or has this progressed over time? And how do the quads look?
Re: Spectral scan issues
Posted: Wed Nov 14, 2012 10:12 pm
by geigerjcjr
It happened all at once. I have actually took the whole sideplate with quads and installed it on another instrument and it worked fine.
Re: Spectral scan issues
Posted: Thu Nov 15, 2012 12:17 pm
by Don_Hilton
My thougths go in the direction of an electronics failure - given that you describe some kind of signal, but badly formed, perhaps something related to the radio frequency generator for the quads. (And that perhaps is a guess. It has been so long ago that I had an RF section go out - and I think that was on a 5972, the symptoms are far back and lost in history for me.)