... color of objects and can tes Characteristicsl Wide application range and easy-to-operate feature. l ... equivalent to tristimulus values X, Y, and Z calculated in corresponding functions under GB3978 standard illuminant ... display screenl USBl Measurement window: Ø20mml Wavelength range: 380nm~760nm l Total uncertainty of wavelength ( ... Δy≤0.002l Palette system: l Color: X, Y, Z; Y, x, y; L*, a*, b*; L, ...