While we had been playing with things, I kept the alarm levels a little sloppy but now that we'll likely leave this alone for a time, I've closed down the range of operating pressures.

The alarm handler will alarm (as it has for some time) at differential pressures outside of +-2PSI.  The servo should have no problems keeping the pressure within that range.  Further it will alarm MAJOR at +- 5 psi.  If the minor alarm goes off and stays out of major alarm, it is likely the servo has frozen or someone left it in manual mode.  Please address asap and feel free to seek realtime help from me.  There is an OPS wiki too.  If the alarm is ignored, an avoidable HEPI trip will likely be the result.