State metrological certification of high school English class product cost switching operations without specular reflection (SCE) to test the powder and colloidal camera viewfinder features for the enterprise, external color assessment and data governance to achieve yellow and white of the test can do more tests were averaged PC data management software computer data storage capacity similar products in a cost-effective access to national measurement certification ● ● ● English ultra-stable performance switching operation display accuracy 0.01 ● ● △ E repeatability standard deviation 0.08 ● achieve yellow, white test ● can do more tests were averaged ● black and white calibration function by improving the accuracy of each test, the professional design standards, powerful configuration ● Ergonomic design ● Large-capacity data storage ● Multi-mode color value display ● PC software, computer data management ● USB, Bluetooth data connectivity and output ● provide accurate test time is set ● can manually set the established standard of L * a * b values ??● fit within the enterprise, external color evaluation and data management and control of special professional testing technical parameters of the lighting / light system 8 / d (8 ° illumination / diffuse the light), excluding the specular reflection light (SCE) standard sample storage 100 groups each set of 100 standard sample under test group display mode chrominance values: L * a * b, L * C * h, △ E * ab, XYZ, RGB value relative; color value: △ (L * a * b), △ (L * C * h); whiteness: Hunter whiteness, Ganz whiteness; yellowness value: YI measurement time is about 0.5 seconds to measure light LED interface language Chinese English Power supply 4 AA1.5V alkaline batteries or nickel metal hydride batteries, special adapter DC5V measuring diameter of about 8mm in diameter measurement conditions printer interface USB2.0 CIE 10 ° Standard Observer, CIE D65 light weight of 550g measuring range L *: 1-100 size 77 × 86 × 210mm repeatability standard deviation △ E * ab *, less than 0.08 (Measurement conditions: White calibration plate measured 30 times averaged) Other function