Hoping to reduce the lowest frequency noise of the T240, I added 3/4" thick (radial) pipe insulation to the three platform legs. See the photos for before and after with a shot of the insulation too. The legs are 2" diameter and 12ish" long. Don't think much thicker insulation could be used until we do something different with the C-clamps holding the table legs to the base platform.
Cheryl, Hugh, & Krishna (on phone)
I ignored it doing other things but Cheryl noticed that the BRS was not damping down after my insulating incursion and more importantly that the BRS BOXBIT (health evidence seen in H1:IOP-SEI_EY_MADC0_EPICS_CH30) was zero'd after typically running at 8192.
The problem was the ethernet cable on the Beckoff box internal to the BRS enclosure. The box is barely accessible and this cable is on the blind backside. I was able to pull this out w/o releasing any locking tab and I was unable to push it in such that it clicked/locked in place. After pushing (actually blind toward me pulling) hard it now seems connected (although again, not locked in place) and the BOXBIT is good and the damping worked.
For operators: if we ISI guys walk away and say everything is okay and you see that the signals are still rung up after an hour, it isn't going to damp and something needs attention. You tell us to get it together and fix it! Thanks!
Jim--watch the drift mon, it may hit -15k before it returns on the warm up!