Clarus 500 MS head amplifier
Posted: Sat Feb 08, 2014 6:09 pm
Our Clarus 500 GC/MS was operating normally, but now I am getting only noise signal, no MS peaks.
The Source parameters and MS parameters were not changed.
This was an indication that the photomultiplier
tube was dameged, so I changed the tube. Unfortunately, no change - still only noise. Does anyone have experience replacing
the head amplifier? The procedure is described on pages 107/108 of Clarus 500 MS Hardware guide. Everything is clear, except the last point
says:
"Go to the Head Amplifier electronic adjustment procedure."
and this is all - no explanation how to adjust/check the Head Amplifier. Any suggestions,
Thank you very much,
Jan
The Source parameters and MS parameters were not changed.
This was an indication that the photomultiplier
tube was dameged, so I changed the tube. Unfortunately, no change - still only noise. Does anyone have experience replacing
the head amplifier? The procedure is described on pages 107/108 of Clarus 500 MS Hardware guide. Everything is clear, except the last point
says:
"Go to the Head Amplifier electronic adjustment procedure."
and this is all - no explanation how to adjust/check the Head Amplifier. Any suggestions,
Thank you very much,
Jan