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Reports until 19:04, Friday 14 April 2017
H1 General
corey.gray@LIGO.ORG - posted 19:04, Friday 14 April 2017 - last comment - 19:35, Friday 14 April 2017(35559)
1:43utc: H1 Lockloss

This ended a 31hr8min lock.  Had a few issues for ALSx, but it seems to be fine now.  Working on getting it back.

Not sure of lockloss.  Looks pretty quiet seismically and nothing looked amiss before the lockloss.

Comments related to this report
corey.gray@LIGO.ORG - 19:35, Friday 14 April 2017 (35560)
Link

Notes:

  • 1:43 Lockloss (ending 31+hr lock)
    • Had a bit of trouble for ALS_XARM flashing PDH faults, but went to DOWN/INIT & it came up fine the next time.
    • SDF Diff was due to the EX H1:ALS-C_LOCK_REQUESTX requesting RED Locked instead of End Locked.  Went to End Locked and this took care of the Diffs (for H1SYSECATC1PLC2 & H1SYSECATX1PLC2).
    • 4.735kHz Mode:  Was rung up as in last lock.  I changed the MODE10 from FM4, FM9 (+30deg) & FM10 enabled---> and went to only FM4, FM10 being enabled.  This quickly took down the 4.735 kHz Mode under 1e-18.  ACCEPTED this in SDF.
    • PI Mode 28 & 27 rung up---flipped their phase signs and they were good.
  • 2:32 OBSERVING
    • PI MODE 27 came back up again.  Flipped the sign to address it.
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