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Noise baseline with spikes happened over night.

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Noise baseline with spikes happened over night.

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Danny Do
I have a system GCMS HP6890 / 5973 MSD operate for Environmental testing for VOCs under EPA 8260B
Image
the noise like in the picture happened overnight, I wonder what cause this and how to fix it

Re: Noise baseline with spikes happened over night.

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Steve Reimer
Looks like electronic noise. Is it continuing? Try a reboot on the mass spec if it continues, but it may wind up being expensive. (side board or something in the high voltage system)
What is your PM voltage?
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