TITLE: 03/28 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 104Mpc
INCOMING OPERATOR: Travis
SHIFT SUMMARY:

- Switching the violin mode guardian to simple takes us out of observing
- It would be useful if there was a log of the channels that change in SDF when they kick us out of observing (if there is not one already). Sometimes the change is temporary and too quick to catch by eye.
- Jim found issues with the guardian switching SEI blends.
- Sometimes the violin mode guardian thinks a mode is growing, and it turns off the gain in response, but it was only a short term increase, and turning off the gain then makes it grow steadily. I believe this happened with ETMX mode 13 and 6.
- Rahul would like us to make certain that the ETMX mode 9 gain is set to -3 (the violin mode guardian may turn it off, and we want to test keeping it on).


LOG:

23:17 - 23:30 UTC Changed from earthquake to windy. Jim had to intervene to fix blends. Calibration measurements restarting.
00:05 UTC Observing.
00:25 UTC ETMX mode 13 was growing because the guardian had turned the gain off. When I took the violin mode guardian to simple, it took us out of observing. Turning the gain back on brought it back down. Left out of observing for Jeff K. Now ETMX mode 6 is having the same problem.
00:45 UTC Damping on simple. Set ETMX mode 6 gain to 5. Put back to IDLE and then Damping_On_DC.
01:03 UTC Changing the state of the violin mode guardian might have turned off the ETMX mode 9 gain. I set ETMX mode 9 gain back to -3 without changing the violin mode guardian. Seemed to work.
01:15 UTC Set observatory mode to calibration (late)
01:53 UTC Back to NLN
01:55 UTC Observing
02:42 UTC Violin mode damping guardian knocked us out of observing when it changed one of the gains?
02:43 UTC Observing
03:48 UTC Realized I forgot to set observatory mode to observing. Did so.
05:00 UTC Twice dropped out of observing by violin mode damping guardian. Unmonitored ITMX mode 17 gain in SDF and set back to observing.
06:05 UTC Dropped out of observing. Not certain why. Set back to observing.
06:51 UTC Dropped out of observing by TCS_ITMY_CO2 guardian. Waited for it to settle, set back to observing.