Reports until 20:38, Monday 29 August 2016
H1 AOS
jeffrey.kissel@LIGO.ORG - posted 20:38, Monday 29 August 2016 (29372)
Reminder -- H1 SUS ETMY UIM/L1 Coil Driver Monitor ADCs are Busted.
J. Kissel

While grabbing RMS Current monitors for every suspension to further research the PUM / L2 Current Limiting Watchdogs, I noticed that most of the monitors for the UIM / L1 stage of the H1 SUS ETMY suspension show an offset of -4200 [ct]. This is typically the case when a single leg of the SCSI input cable to the ADC channel is bent and therefore not connected. This problem type was originally documented in LLO aLOG 1857, and found on these particular ADC channels in Nov 2014; see LHO aLOG 14930.

It had been added to the long standing Integration Issue #9 (II #9, now FRS #5135) then, but because it's likely overwhelming generic, I'll open up an FRS ticket for this specific issue. Should be a quick fix.

This is now FRS Ticket #6114.

Images attached to this report