Reports until 16:52, Wednesday 02 November 2016
LHO General
patrick.thomas@LIGO.ORG - posted 16:52, Wednesday 02 November 2016 (31144)
Ops Day Shift Summary
Matt E., Dave, Jenne, Jeff K. and I tracked the problems with PI down to settings not being restored or not being restored correctly by SDF after the reboot on Tuesday. It is unclear if the problem with SDF was human or computer error. Jeff K. and Matt reverted the PI settings to those from a week ago. It appears that mode 27 is now back under control.

15:00 UTC Robert to end X to perform injections while at NLN
15:52 UTC Lock loss (PI mode 27). Tried changing sign of gain and turning off damping to no effect.
15:52 UTC Christine and Karen to mid stations
15:54 UTC Kyle to end X
15:54 UTC Robert back
15:56 UTC Robert to end Y to pickup hardware
16:15 UTC Changed to VERY_WINDY_NO_BRSXY
?         Robert back
16:19 UTC Pausing at violin mode damping 2 waiting for roll modes to damp.
16:33 UTC Kyle back. Checked that RGA does not have a leaky valve. It does not.
16:50 UTC Karen leaving mid Y
16:52 UTC mode 27 starting to rise
16:59 UTC Lockloss
Changed to WINDY during CHECK_IR
17:46 UTC Stopping at VIOLIN MODE DAMPING 2 again.
17:59 UTC King soft water through gate to check RO
18:04 UTC Changed BP filter for mode 26 from FM1 to FM8. Changed the set frequency to 207.8 from 207.7
Changed set frequency for mode 27 from 244 to 240.
18:08 UTC Turned on output to mode 27 damp filter
18:15 UTC Changed BP filter for mode 26 back to FM1. Changed the set frequency to 209.
18:19 UTC Daniel to LVEA
Changed set freq for mode 18 from 207.9 to 207.8
18:45 UTC Daniel back
19:02 UTC Struggling to lock PRMI. Starting initial alignment.
19:10 UTC G Wave candidate alert
19:14 UTC Daniel to floor (WP 6294). Says I am going to lose the MC. Aborting initial alignment and setting ISC_LOCK node to DOWN.
19:43 UTC Daniel back. Restarting initial alignment.
20:19 UTC Initial alignment done
20:41 UTC Stopped at DC readout. Diagnosing PI and SDF.
22:44 UTC PI settings reverted. Going to NLN.