Reports until 04:52, Thursday 05 December 2019
H1 General
jeffrey.bartlett@LIGO.ORG - posted 04:52, Thursday 05 December 2019 - last comment - 06:45, Thursday 05 December 2019(53697)
Ops Owl Mid-Shift Summary
   Lost lock at 11:37 (03:37). Working on relocking. 
Comments related to this report
jeffrey.bartlett@LIGO.ORG - 05:37, Thursday 05 December 2019 (53698)
   Appears to be a problem with the Fast Shutter. MSG "Fast shutter failed test! Do not power up!". Continuing to investigate. 

 
richard.mccarthy@LIGO.ORG - 06:45, Thursday 05 December 2019 (53699)

The High Voltage interlock tripped the power supplies off for Ham 6.  Looking at vacuum signals everything seems fine.  We do not monitor the Ion Pump controller that this interlock is tied to as this is a temporary setup.  The screen on the floor for the controller indicates everything is fine and I was able to reset the interlock with a power cycle to the interlock chassis.  This  power reset is indicative to the safety relay only seeing a single contact opening instead of two contacts opening so the reset button does not work in this state.