' Automatic calibration: The anode material of the Xray tube is automatically identified. The rst you should go to "Menu": "Goniometer" and "Set to zero". The crystal must be manually set under "Menu": "Goniometer"= "Parameter". For calibration, select "Menu"= "Goniometer": "Autocalibration". The device now determines the optimal positions of the crystal and the goniometer to each other and then the positions of the peaks. The display shows the corresponding calibration curves. The newly configurated zero position of the goniometer system is saved even after switchoff of the Xray unit