Well, unlike at EndY, the pump station maintenance did not pay off as well.  Bottom line: remaining coherences seen in the Z and HP dofs are not reduced as much as they are at EndY after the maintenance.  Possible reason--while I found lots of Accumulators that needed charging (just like at EndY,) the explicit grounding of the power supply common legs did not make the Pressure Sensing noise better.  In fact something in this process has made the sensor noise worse; but it was't the adding of the ground.

Details:  First I added the explicit jumper from the common legs on the power supply to the supply ground plug but this had no observable affect on the striptool I was watching.  I figured it was doing no harm.  After Guardian brought ISI/HPI down to OFFLINE, I ramped the pressure down with the servo.  Then the motor was greased and Accumulators were charged: most Accumulator were essentially uncharged and two on the pump station were leaking.  I was able to play with the Schaeder Valve and stop the leaks (may be iffy.)  After the Accumulators were charged, the system was brought back online and Guardian reisolated with no problems.

See the first attachment for the second trends where the system was down and then back on.  This is where I first saw that the noise on the pressure sensor channel more than doubled.  What happened to cause the noise to change like this?  I plugged the ground wire in before bring the pump down and didn't see an noise increase.  Is the power supply flaky?  I did have to move the servo box around to access the Accumulators...

It is clear this is bad when you look at the second attachment with the Pump Pressure ASD: it is a few to several factors worse than Sunday(Reference traces.)  The remaining attachments are the coherences between the Pump Pressure and the HEPI L4C & ISI T240s.  The coherences have improved suggesting the Accumulator serve us well.  But the improvements are not as good as seen at EndY where the Pump Pressure Noise dropped  5 to x10.