In this training session, you will learn more about what vacuum is and especially on molecular flow. Pumping concepts will then be introduced. In this part, it will become clear for you that not only the gas originally present in the volume must be pumped. In the third part, the operating principles of rotary vane pumps and oil diffusion pumps will be explained while the fourth part will describe the sensors operating principles. The Cyclone® Kiube vacuum subsystem operation will then be presented in part five. And finally, an introduction to leak detection will conclude this training module.