kyle.ryan@LIGO.ORG - posted 11:26, Wednesday 02 April 2014 (11127)
~1100 hrs local -> Valved-out MTP at Y-end briefly while switching between QDP80 and scroll backing pumps
Demonstrated MTP safety valve closes and turbo spins down with the removal of AC to the scroll pump -> This mimics the functionality of a loss of "Motor Run" signal from the nominal backing pump -> Shut down QDP80 and purge air supply