J. Kissel, J. Bartlett, A. Ramirez We've measured the open light currents on the newly cabled up H1 SUS SR2 (with a metal dummy mass), calculated and applied the compensating offsets and normalization gains, captured a new safe.snap, and committed it to the userapps repository. Details below! -------------- Using the matlab script /ligo/svncommon/SusSVN/sus/trunk/Common/MatlabTools/prettyOSEMgains.m the captured open light currents and calculated normalization gains and compensating offsets are >> prettyOSEMgains('H1','SR2') OSEM OLC [ct] Gain Offset [ct] M1T1 25985 1.155 -12992 M1T2 26833 1.118 -13417 M1T3 25702 1.167 -12851 M1LF 31475 0.953 -15738 M1RT 25346 1.184 -12673 M1SD 25571 1.173 -12786 M2UL 25576 1.173 -12788 M2LL 27473 1.092 -13736 M2UR 24401 1.229 -12201 M2LR 26282 1.141 -13141 M3UL 26043 1.152 -13021 M3LL 25772 1.164 -12886 M3UR 25342 1.184 -12671 M3LR 24901 1.205 -12451 These were manually installed in the H1:SUS-SR2_${ISOSTAGE}_OSEMINF_${DOF} bank, with ${ISOSTAGE} = [M1, M2, M3] and ${DOF} = [T1, T2, T3, LF, RT, SD] or [UL, LL, UR, LR] for M1 or M2/M3, respectively. Though Mark has written a nice utility for capturing safe.snaps (see LHO aLOG 5202), we needed to get this done fast, I hadn't used it before, neither Mark or Arnaud are here to help us if it breaks, so we captured the files "by hand" (which is quickest for me), hence: (1) Turned OFF the masterswitch. (2) Turned OFF all requested DAC drive (LOCK, TEST, and OPTICALIGN outputs all OFF), other than the damping filter outputs which remain ON. (3) Made sure the band-limiting filters were engaged in the filter banks preceding the watchdog trigger values. (4) Captured each suspension's safe.snap, saving over what is in the userapps repository, e.g. controls@opsws0:burtfiles 0$ pwd /opt/rtcds/userapps/release/sus/h1/burtfiles controls@opsws0:burtfiles 0$ burtrb -f /opt/rtcds/lho/h1/target/${ifo}sus${optic}/${ifo}sus${optic}epics/autoBurt.req > /opt/rtcds/userapps/release/sus/${ifo}/burtfiles/${ifo}sus${optic}_safe.snap (3) Ensured that the link to target directory (which is where the front end *actually* looks during reboot) was in place, e.g. controls@opsws0:burt 0$ pwd /opt/rtcds/lho/${ifo}/target/${ifo}sus${optic}/${ifo}sus${optic}epics/burt/ controls@opsws0:burt 0$ ls -l safe.snap lrwxrwxrwx 1 controls controls 63 2013-01-17 12:46 safe.snap -> /opt/rtcds/userapps/release/sus/${ifo}/burtfiles/${ifo}sus${optic}_safe.snap (4) committed the new safe.snap to the userapps repository, controls@opsws0:burtfiles 0$ pwd /opt/rtcds/userapps/release/sus/h1/burtfiles controls@opsws0:burtfiles 0$ svn commit -m "Installed and captured new open light current gains and offsets." ${ifo}sus${optic}_safe.snap