... mode: R457 blue light whiteness, 7. Meter light: 6V 15W halogen lamp, 8. Zero drift: ≤0.2, 9. Value accuracy: ≤ ... 0.1, 11. Measuring repeatability: ≤0.3. Configuration of Brightness Tester: Mainframe, standard white board, power line Recommend reasons of Brightness ... operation, keeping handlers safe, 3. Reasonable price. Keywords of Brightness Tester: ISO 2469, ISO 2470, ISO 2471, ISO 2472, TAPPI T519 ...