The pressure shown on the PRx Module faceplate is the base pressure setpoint, set during PRx Module configuration. The iTrax system uses a PID feedback loop to maintain the setpoint pressure by comparing the base pressure at the spray gun to the base pressure at the pressure controller and adding a correction factor to the base pressure setpoint signal sent to the pressure controller.
NOTE: This function must be enabled by your Nordson Service Representative and requires adding a Nordson Pressure Controller to the system.