TITLE: 02/20 OWL Shift: 08:00-16:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1:
INCOMING OPERATOR: TJ
SHIFT SUMMARY:
Decent shift up until the latter half of the shift with a couple of PSL trips (see earlier alog).
LOG:
- 8:06 5.4 EQ in Peru seen on USGS
- 9:37 Lockloss (for 24+hr lock) No observable culprit
- Tweaked ETMs & also TMSx/y because arms were at .9 & .8 respectively
- 10:09 OBSERVING
- 13:01 H1 Lockloss: 1-4 flow---> Glitch in laser head flow sensors; labeling as CORRECTIVE MAINTENANCE
- Called Jason & granted remote access to bring PSL back.
- 13:58 Returned to locking
- PSLISS SDF DIFFS FOR REF SIGNAL: -1.099 --> -1.079 ACCEPTED (with Jason Approval)
- 14:31 Back to OBSERVING!
- 14:43 H1 Lockloss due to PSL again.
- Got Jason on the phone to help again.
- Had to top off Crystal Chiller again to 350mL this time
- Jason said to give him a call if we get another Sensor trip (hopefully we don't get one *knock on wood*)
- 15:40 Back to LOCK ACQUISITION---only minor tweaks in PRMI but zooming through ISC_LOCK
- Handing off to TJ
- Had a lockloss during latter states of ISC_LOCK---saw the violin modes ringing up (TJ also noticed that the ETMx RMS watchdog tripped a few minutes before all of this business---that's a new one on me.) Good luck, TJ!