Spectral Colorimeter is designed by CHNSpec Tech. This video shows the packing list, interface, aperture, black and white calibration, how to measure color with CS-280 spectral colorimeter. It is with optional aperture 4mm/6mm/11mm/15mm and works in color spaces CIEL*C*h*, CIEL*a*b*, CIEXYZ,etc. It supports illuminates A, C, D50 and D65 to meet different kinds of measuring standards. For more details, please refer to website www.chnspec.com