A valve positioner system with zero bleed at steady state is disclosed. The partition plate assembly has first and second sides, has a non-magnetorheological-fluid first orifice, and has a magnetorheological-fluid second orifice. With this approach, frequency feedback on the second resonant mode and topographic feedback on the first are decoupled, allowing much more stable, robust operation. The computer can produce transform data comprising a transformation of the exposure data according to the selected exposure compensation technique. The indication is generated when comparing the counter to the threshold value yields a first result to indicate that the memory system is substantially near a failure condition. The bias correction signal output to a clamping circuit coupled to the cathode.