Kyle

I had left the combined volumes purging over the weekend-dry air entering XBM purge port and wet air exiting IMC purge port which I had left blanked minus a gasket-good flow, i.e. effective purging -> This morning I found that the LVEA Purge-Air drying tower had malfunctioned at some point over the weekend (Check valve stuck open, will fix asap) such that only the right drying tower was completing the drying/regeneration cycle while the left tower wasn't at the correct pressure during its regeneration phase -> I isolated the VE from both purge connections and measured the dewpoint of the purge air header at the IMC purge connection to be -18C when on the malfunctioning tower and -21C when supplied by the working tower (-6C ambient air) -> Next, I measured the dewpoint of the "Blowdown" air exiting the ~1 psig VE while the purge air header was isolated and found it to be -25C  

~1430 hrs. local -> Started "attended" rough pumping of HAM2,3,BSC1,2,3,7 combined volumes (NOTE to self: have unused 1.5" angle valve on BSC7 dome open to its NW blank and unused XBM 6" gate valve open to its 8" blank during roughing -> will need to close these when switching to turbo)

~1630 hrs. local -> Halted "attended" pumping via closing O-ring valve on turbo header -> will resume tomorrow