SZENARIS has developed a training system for the service engineers of Bruker Daltonik for the maintenance of mass spectrometers. As part of the project, the CAD data of the mass spectrometer was transferred into an interactive 3D world. This allows learners to work virtually on the device, for example to remove and install certain assemblies by applying the correct work steps. In this way, they already get to know the mass spectrometers without having seen the devices in real life.