Advanced Technology Reflectance Unit

The K30700 is easy to use and contains state-of-the-art electronics. To measure reflectance ratiometrically, two calibration points are required. The instrument uses a black cavity standard and a standard plaque. The black cavity standard is designed to have nearly zero reflectance and the standard plaques are calibrated to a traceable national standard with a known reflectance. The first calibration point is referred to as the “dark” or “zero” offset. When a plaque of known diffuse reflectance is placed on the search unit, it produces a voltage in the photosensor array proportional to the light reflected from the plaque. This provides the second or “reference point” of the calibration