Reports until 16:51, Monday 03 June 2013
H1 SEI
hugh.radkins@LIGO.ORG - posted 16:51, Monday 03 June 2013 (6603)
WBSC1 HEPI Actuators in RUN; IPSs zero'd
Per WP3934, I put the BSC1 HEPI Actuators in Run or Operational Mode.  This entails closing the Fluid Return and Supply lines at the chamber, closing all the bleed valves on the Actuators and then opening the exit valve for the wheatstone bridge.  This is the operational state for the HEPI Actuators.  I saw a 2 to 4 mil drop of the IPS readout for the vertical actuator when the supply & return valves were closed (pressure drop at Actuators).  The Horizontal actuators 'retracted' about 1/2 to 2/3 mil.  These moves did not come back when the pressure was returned.  The Crossbeam Foot is locked and these numbers may recover at that time, we'll see.
We'll stay in this state for a day and when permissible, unlock the Crossbeam Foots and continue with commissioning.