Displaying report 1-1 of 1.
Reports until 08:04, Tuesday 14 July 2015
H1 ISC (CDS, DAQ, ISC, SEI, SUS, SYS)
jeffrey.kissel@LIGO.ORG - posted 08:04, Tuesday 14 July 2015 (19616)
Maintenance Day Prep
J. Kissel, E. Merilh, J. Warner

Found the IFO held in the INCREASE POWER state (that's why we're only at 30 Mpc, bcause the global DARM control hadn't switched to ETMY's LVLN driver, so we're limited by ETMX's HV Driver's DAC noise), though the requested state is DC READOUT. It's been locked for the past 4 hours.

Checked SDF for any new differences since last night:
- Accepted a few changes on the ITMs and ETMs for Violin Mode Damping (described in LHO aLOG 19594)
- Looks like we've been messing with DRIVEALIGN P2L and Y2L gains for the ETMX as well. (No associated aLOG, but I've accepted them anyway, since we're locked) I've not accepted these changes (and therefore will be lost with the front-end maintenance today), but if they're needed:
                                      In the safe.snap     Currently
H1:SUS-ETMX_L2_DRIVEALIGN_P2L_GAIN      1.1                   1.0
H1:SUS-ETMX_L2_DRIVEALIGN_Y2L_GAIN      1.37                  1.3

- Brough the ISC_LOCK to DOWN (this didn't break the lock)
- Brought IMC to offline (this broke the IFO lock)

- Brought HAMs 1-6 to OFFLINE (technically just "ready" for HAM1 HEPI)
- Brought BSCs 1-5 to OFFLINE
- Brought ETMs and TMSs to SAFE

We're ready to begin the scheduled tasks  -- see LHO aLOG 19600
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