Attempted to reengage the ISI Isolation with the added tilt of HEPI.  This HEPI tilt swings the ISI such that the current free hang location of the CPS is too far from the previous position.  The T240s ring up and trip the process.  I attempt to get there by first setting the Current Setpoint to current location (there's a button for this) and of course that worked until the latter part of the script tried to drive the CPS back to the free hang position.  So, I then further pushed the Current location into the Target position.   This of course did work cause it basically drives the ISI nowhere and doesn't kick/tilt the T240.  But, the ISI now operates in this tilted position.  To get it back we'd just need to untilt the HEPI and reset the ISI setpoints and targets.

Back to the Isolation operation, last Friday JeffK & I noticed the ISI drives growing after being at lvl3 isolation.  These rang up and tripped on Actuator drive levels.  I set the ISI to lvl1 isolation and pulled out a book.  No noticible ring up after several minutes.  So I controlled down and went up to lvl2 isolation.  Again, several minutes and no problem.  Not sure if I waited long enough but...

Then I ctrldown and put it in lvl3 isolation.  Sure enough boost2 was engaged rather than boost3.  I left it be and after running pretty well about 15 minutes the drives started to ringup mostly in Stage2 Verticals but other channels as well.  I ctrldown next and then brought it back to lvl3 again but now switch from boost2 over to boost3 right away.  Again the drive rung up after about the same amount of time.  I should have been watching the spectrum before it rang up but I again had dtt troubles.  When I did get it running the drives were already excited.  Looking at the spectra I saw a tall peak at 147hz.  I then did a ctrlDown and saved the trip.  As the spectra quieted down, the 147hz peak withered.  Better to see this pop up while steady state rather than disappear after ctrlDown but it maybe what is happening.  One thing I notice in the trend is that it looks to stop increasing in amplitude after a time.  See attached.  Maybe it would settle back down or maybe it eventually trip the watch dog but I didn't give it that chance this time.

In the attached plot you see the Master Drive going up and down as the isolation is engaged and ctrlDown'd.  The lvl3 isolation is the last two wider segments.  Notice the ramp up of the signal stops after a time and goes flat before I ctrlDown.  Again so very interesting...

I've set the isolation to lvl2 for now; looks OK after about 20 minutes.