The electrical grounding situation in the HEPI Pump Station controller/servo is not robust.  See the attached where while fussing about in the area in early December I somehow disrupted the ground.  The pumps went down at this transition (not necessarily causal) but when the platfoms comeback under control, the local sensors will usually have some offset.  What I done in the grace window is repeat the channels in 2 & 3 and 4 & 5 and zoomed into them to a similar level to see if the position sensor is noisier after the increase in noise on the pressure channel (trace1.)  I'd say the answer is maybe..maybe not.  Maybe JeffK will suggest a better way to study this.  I can alwasy just switch the servo into manual mode and that way the drive to the pump station will be unchanging and not effected by the controllers response to the pressure channel noise.

Meanwhile, we should continue to get back to the quiet signal time however that may be achieved.