kyle.ryan@LIGO.ORG - posted 10:32, Thursday 19 July 2018 (42973)
De-energized turbo controllers @ YBM, XBM, Vertex and X-end
I noted that the foreline pressures were all < 5 x 10-2 torr. This just confirms that all four Vacuum Sentry valves are working -> they isolate the scroll pumps at the loss of power to the scroll pumps.