Patent ID: 8151620

Claim:
A method for calibrating an input signal sent to a pressure control device with an output pressure provided by the pressure control device, the method comprising the steps of: providing a target threshold that comprises a first actual input signal operable to produce a first output pressure; providing a lower estimated threshold that comprises a first estimated input signal estimated to produce a second output pressure; providing an estimated signal-to-pressure relationship that provides a plurality of estimated input signals estimated to produce a plurality of output pressures, the estimated signal-to-pressure relationship including the target threshold and the lower estimated threshold; determining a lower target threshold that comprises a second actual input signal required to produce the second output pressure; calculating a signal offset from the difference between the second actual input signal and the first estimated input signal; determining a calibrated signal-to-pressure relationship that provides a plurality of calibrated input signals operable to produce the plurality of output pressures, wherein the plurality of calibrated input signals are proportionally offset from the plurality of estimated input signals using a proportional value of the signal offset.