Been distracted so I'm not sure what the state has been for a few days but attempted to turn on the BSC9 ETMx ISI and it tended to trip due to the T240.  RyanD(LLO) reminded me of the steering offsets, I didn't think they'd matter that much for the ISI since HEPI can do so much more but I looked at them anyway.  Since before the pump down beginning ~10 Dec, the alignment targets or CPS Offsets had not been reset.  This causes too great a drive and saturates theT240s.  So I reset both the Offsets and the Targets.  I should have just done the offsets first to see what happens but I did both.

Looking at the cartesian positions, the Zs and Rzs saw some very large shifts during the pump down.  Stage1 & Stage2 Z both saw 17umeters drops.  Much more drawn out over time the Rz of the two stages saw ~10urad shifts.  These are possibly attributed to buoyancy and thermal effects.  The translational & Rx/Ry changes were more like 1um.

Anyway, bottom line, the CPS offsets and targets were too far from the idle free position and would not stay stable trying to move these large shifts.  Now with close offsets and targets, the system turns on quietly.

I started with level1 and then rememebered Hugos status log where he put us at level3 isolation.  I bumped it up to that directly.

Attached are some trends of the CPS positions since before the pump down.