aLIGO LHO Logbook

LHO VE

kyle.ryan@LIGO.ORG - posted 15:45, Wednesday 13 July 2016 - last comment - 16:07, Thursday 14 July 2016(28391)

Manually over-filled CP3

1440 -1510 hrs. local -> To and from Y-mid 

Opened exhaust check valve bypass valve, opened LLCV bypass valve 1/2 turn -> LN2 @ exhaust in 60 seconds -> Restored valves to as found configuration. 

Next CP3 overfill to be Friday, July 15th. 


Also, demonstrated MTP Safety Valve functionality when backed by local scroll pump (rediscovered that the "NORMOAL" light LED on the turbo controller is burned out) -> Let MTP brake phase complete but am leaving turbo rotor levitated, i.e. controller energized, overnight -> will de-energize tomorrow.

Comments related to this report

kyle.ryan@LIGO.ORG - 16:07, Thursday 14 July 2016 (28417)

Link

~0900 hrs. local -> De-energized Y-mid Turbo controller (Foreline 1.2 x 10-1 torr, turbo inlet 2.6 x 10-1 torr seams odd - gauges reversed?)