Reports until 16:43, Tuesday 26 February 2013
LHO VE
john.worden@LIGO.ORG - posted 16:43, Tuesday 26 February 2013 (5589)
Hard-closed GV7

~1630 hrs. local

John W.  requested that I increase the air pressure applied to the top of GV7's piston to ~20 psi so that we could be assured that the "Soft-closed" GV7 gate was in full contact with its O-rings.  If not in full contact, IP6 might be pumping hydrogen from the X-arm which would confuse the pressure comparison between the two BTs.  -> As found,  the piston close pressure was ~5 psi -> I increased this to 20 psi -> GV7's gate cammed fully closed a few minutes later

GV7 is now "Hard-closed"