Kyle, Gerardo 

Removed 1st generation ESD pressure gauges from BSC9 and BSC10 and installed 4.5" blanks in their place -> Installed 1.5" metal angle valve and 2nd generation ESD pressure gauges on the domes of BSC5 and BSC6 -> Started rough pumping of X-end and Y-end (NOTE. dew point of "blow down" air measured < -3.5 C and < -5.5 C for X-end and Y-end respectively.  This is much wetter than normal.  I had found the purge air valve closed at the X-end today.  It was probably closed to aid door installation yesterday but not re-opened(?).  Purge-air can be throttled back in some cases but should never be closed off.  Y-end explained in earlier log entry)


Kyle 

Finished assembly of aLIGO RGA and coupled to 2.5" metal angle valve at new location on BSC5 -> Valved-out pumping for tonight -> will resume tomorrow and expect to be on the turbos before I leave tomorrow.