A system including a controller, an interface, and a calibration controller. The controller is configured to (i) select a set of fields, and (ii) based on the set of fields, supply control effort to first actuators in zones of a chamber. The interface is configured to receive feedback signals from sensors. The feedback signals are indicative of fields respectively of the zones. The controller is configured to adjust an amount of control effort supplied to the actuators based on the fields. The calibration controller is configured to, based on the fields, generate calibration values for each of the sensors. The calibration values for each of the sensors are indicative of field contributions corresponding respectively to the actuators.