Color appearance models provide a powerful tool for achieving a viewing condition independent color representation. However, current color appearance models such as CIECAM97s 1,2 and CAM97s2 3 are more complex than previous CIE device independent color spaces 4 , such as CIELAB and CIELUV. Therefore it is important to understand how to correctly measure and set the input parameters. This paper provides details about how to set the luminance of the adapting field, the surround, the luminance of the background, and the white point. There is also discussion of the format of the input perceptual attributes, the output perceptual attributes and example parameter settings for a range of viewing conditions.