The ETMY HEPI PLC was replaced yesterday with a new Beckhoff unit, and so far everything seems to be working okay, but we'd probably only notice if things weren't working at all. The seismic stack isolated no problem yesterday when we were recovering.

 First attach image are trends of the pressures over the last couple of days. It seems like whatevery else has happened there is less overall noise in the pressure readbacks, probably a good thing. Pressure so far seem as stable as before.

Second image are (top) asds before and after for the differential pressure error point for the pump controller and the output pressure readback on the pumpstation (PRESS4, this sensor is at the end of the output manifold on the pump cart) and (bottom) coherence with the Y HEPI L4Cs. The before asds both show some weird "anti-comb"(?) and are consistent with the greater readout noise seen in the timeseries trends. The after asds look nice and quiet by comparison. The coherence between the diff pressure and the Y HEPI L4Cs hasn't really changed, so I don't think we have made the HEPI motion worse.