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- Posts: 52
- Joined: Sat Jun 27, 2015 12:03 am
After a source cleaning, during pump-down, the source temp as read by Chemstation jumped from ~80 directly to 511. I resolved this, sort of, by replacing the repeller mount and ceramic insulators.
After that it pumped down fine however the Source Temperature was fluctuating between 227-235, it is set at 230. The quad temperature is stable at 150 and unchanging. I then swapped out the feed-through board, or source wire assembly, inside the analyzer.
This is where I'm stuck. At idle all temperatures are stable, ie Source, Quad, and GC-MS interface, but at about the half-way point in the run the source temp starts to jump around from, 225 straight to 295 for example. So far Ramping the oven temp and scanning both filaments (in manual tune) have had no effect on the source temp. Neither has switching he filaments out. It seems to only occur during a run. Any advice/Thoughts?