Reports until 08:37, Tuesday 10 April 2018
H1 SEI
hugh.radkins@LIGO.ORG - posted 08:37, Tuesday 10 April 2018 - last comment - 15:47, Tuesday 10 April 2018(41356)
Some extreme values on the ETMY CPS sensors--suspect timing

At ~2256utc on 3 April (or precisely 1206831398gps), all the CPS sensor readouts on both stages jumped to a different value. Eight of the twelve spiked to a 33kish number before going somewhere else.  A few on Stage2 are not crazy numbers but still shifted.  Most on Stage1 are extreme ~positive 8k.  See attached

Another item to be investigated is the Coil Driver Thermal trip hit at 1557utc on the fifth...

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hugh.radkins@LIGO.ORG - 15:47, Tuesday 10 April 2018 (41367)

Wasted a bit of time by power cycling the CPS power and the sensors interface chassis.  Found the CPS Timing Sync fanout chassis power supply unplugged.  Guess it got swept up in the VE group's house cleaning that was found to be necessary.  While the senors don't read exactly what they did before, they are at least much more reasonable.  And, the platform will isolate.