Starting pumping the XBM today. QDP80 is currently valved out with pressure at 45 Torr. Will resume on Monday. Blow down measured -15degC dew point.
Before pump down I replaced PT-170 full range gauge on BSC7 with a brand new gauge. PT-170 and PT-180 have been acting strange, and after some conversations with manufacturer, we agreed to send at least one unit back for contamination analysis.
Chandra on site 7:30 pm to 9 pm local
I came on site to check this out. I found that the new IP6 valve flange to beam tube was improperly torqued with a large leak to XBM volume. I also found the gate valve not fully closed (not cammed over).
Reconnected purge air to XBM and slightly opened IP6 gate valve to allow flow path for flushing to dry out the volume. We'll check the blow down dew point on Monday.