When setting the ramps make sure that the set value is greater than or equal to the starting value of the first ramp. The closed-loop control and hysteresis are always related to the current (reduced) setpoint. The changed setpoint always applies until the STOP button is pressed, then the configuration value applies once more. When the pressure reduction has finished, the control is stopped, and the system waits until the STOP button is pressed. Mode 2, Automatic Operation After selection of the operating mode, the controller starts the evacuation. The pressure drop per minute is determined during this process. If the rate rises above the automatic threshold, the current pressure is taken as a setpoint, and the system changes into normal closed-loop control. Mode 3, Ultimate Pressure When pressing the Pmin button, evacuation takes place at maximum pump speed until the user presses STOP.