This part of IEC 62563 establishes the performance criteria and test frequencies for the Acceptance test and Constancy test. The evaluation methods are defined in IEC 62563-1. The scope of this International Standard is directed to practical tests that can be visually evaluated or measured using basic test equipment. This standard applies to medical IMAGE DISPLAY SYSTEMS, which can display monochrome image information in the form of greyscale values on colour and greyscale IMAGE DISPLAY SYSTEMS.