Reports until 12:33, Tuesday 02 May 2017
H1 CDS (DetChar, PEM, SUS)
jeffrey.kissel@LIGO.ORG - posted 12:33, Tuesday 02 May 2017 (35974)
H1 SUS ETMY LL FAST I MON ADC channel at ~4300 [ct] from 1/2 of SCSI Cable Grounding Problem (Again)
J. Kissel

I happened to notice that the H1 SUS ETMY's LL coil driver FASTIMON monitor was showing ~4300 [ct].

This is known problem in which one leg of a SCSI connector is bent / grounded / shorted / non-functional (see original documentation in LLO aLOG 1857), and in fact has been solved for this exact channel before (see e.g. LHO aLOGs 14930, 30231, FRS Ticket 6114). 

However, a long trend reveals that the channel went bad *again* on April 12 2017 at 19:08 UTC.
Thanks to Monsieur Bartlett's (and all operator's) detailed logs (in this case LHO aLOG 35508), and that this was on a *Wednesday* during a commissioning window, I can identify that this was a result of Robert's move of a magnetometer, which are indeed in the EY QUAD SUS racks. 

We must be remember to be careful around these SCSI cables!

No urgency to fix, but just letting people know that it's busted. I'll open a new FRS ticket.
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