The WSB digital Whiteness Meter is composed of a light source, a filter, a sample holder and a photoDetector, and the overall whiteness value is blue light whiteness R457. Define the whiteness of a satisfactory surface with 100% spectral diffuse reflectance as 100 degrees, and the whiteness of an absolute black surface with zero spectral diffuse reflectance as 0 degrees. This instrument is designed in full accordance with the standard light source A and illumination conditions 45/0 stipulated by the International Illumination Commission (CIE), through strict testing and debugging, the instrument conforms to JJG512-2002 national metrology verification regulations, and implements GB2913, GB5950, GB8940.1, GB12097, GB13025.2 and other national standards.
★ CAD computer-aided design is used to make the shape of the instrument more reasonable and better.
★ Effective, low-loss switching power supplies are used for higher reliability.
★ Good imported components are used to make the work more stable and the service life longer.
★ The simple optical path design is adopted, which is easier to use and maintain.
★ With a modified color filtering system, the whiteness value after fluorescence whitening can be quantitatively reflected.
★ The reasonable design of the specimen holder and movable platform can effectively avoid the light leakage of the measuring orifice.
★ With a simple operation, the opacity of the paper can be accurately measured.
★ The national calibration whiteboard is used to transmit the correction value to make the measured value more accurate.
★ Measuring range: 0-100 digital display
★ Resolution: 0.1
★ Lighting conditions: 45/0
★ Light source: 12V/30W tungsten halogen lamp
★ Whiteness formula: Blu-ray whiteness WB=R457
★ Measuring aperture size: Φ30mm
★ Indication error: ±2.5
★ Zero drift: ≤0.3/10min
★ The stability of the indication value ≤ 0.5/10
★ Measurement repeatability: ≤0.5
★ Ambient temperature: +5°C~+35°C
★ Relative ambient humidity: <85%RH
★ AC power: 220V± 10% 50Hz±1Hz
★ Power consumption: less than 30W
★ Weight: 7Kg
★ Volume:340×270×280(mm)
孙兆义 - 《中华纸业》