camilla.compton@LIGO.ORG - posted 18:55, Wednesday 27 November 2019 (53530)
H1 Lockloss
- 23:16 Lockloss (while Jim was Operator) We had winds up at 50mph so this is though to be why
- 21 Locklosses in total before NLN I think the wind had a lot to do with this, other things to note:
- 00:32 Stuck in FIND_IR as ALS_DIFF was not moving forward from LOCKED state as ALS_COMM not searching close enough to its's threshold. This was fixed by Jenne who found that the QPD offsets (for TR_X/Y_PD_B_SUM) were not correctly being refreshed.
- Jeff was testing edited UIM low pass filters for ETMX so we were watching whether locklosses were effected by this. alog 53528
- 00:15 Stopped for CHECK_MICH_FRINGES after 15 minutes of DRMI/PRMI
- changed BS Pitch 192.34 to 191.86
- also tried aligning PRMI by moving PRM PIT -1463.5 to -1433.7 and PRM YAW 424.8 to 407.7 (not in the "Operator intervention thresholds" but Jeff and Jenne were teaching me)
- 01.33 Cleared OM1 and OM2 filter histories as these were saturated.
- 02:21 NLN and Observing