J. Kissel Since Hugh had left the servo OFF for later characterization (see LHO aLOG 16388), I wanted to be sure the pressure wasn't drifting, which might potentially cause subtle weirdness for the commissioning vangaurd. I've logged in remotely to check on the HEPI Pump Servo's Differential pressure signal, and found that it was starting to turn downward, and was "accelerating." As such, I've turned the corner station's HEPI pump servo back ON, around 9:30p Local, on the phone with the control room while I did so. The pressure bounced back to 70 [PSI] almost immediately. We'll catch more HEPI pump servo off, DRMI data another night.