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- Posts: 52
- Joined: Sat Jun 27, 2015 12:03 am
I recently took down a 5890 GC 5972 MSD for a cleaning. I put it back together and pumped down overnight, when i came in the next day I ran the Air Water Check and the water was ok (~3%) but the 28 m/z was at 53% of the 69 m/z. I'm in a pretty arid climate so i figured it must be a leak. I closed of the MSD with a no-hole ferrule and ran the check again, same thing. I grabbed some Dust Off and monitoring mass 51 sprayed around the MSD nut and the edges of the top board with no detection. I opened it back up and swapped the filaments again and gave it a once over, nothing stood out, but it did not change anything. If it's not a leak what is it?
Thanks in advance