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Whiteness measuring analyzer adopts the latest semiconductor light source technology, with a service life of 100,000 hours (excluding your replacement and maintenance troubles), the instrument is no longer hot, can be continuously turned on 24 hours, energy saving, automatic correction, instrument stability, reliability Indicators such as the life of the light source have been greatly improved. The instrument is used to measure the whiteness of the surface of the object. The technical performance conforms to the JB/T9327-1999 whiteness meter standard. The measurement result is digitally displayed. The printer can also print the data (the printer is optional and the user can choose according to the needs) Easy to operate and high precision. For departmental flour, starch, flour, salt, textiles, printing, chemical fiber, plastics, clay, talc, white cement, coatings, paints, ceramics, enamel, paper and pulp industry, the need for measurement of the whiteness.
Instrument technical parameters
1. Diffuse illumination vertical detection mode (d/o). The instrument complies with GB3978-83: standard illuminating body and illumination observation conditions, simulates D65 illuminator illumination, uses d/o illumination to observe geometric conditions, diffuse ball diameter Ф120mm, measuring hole diameter Ф20mm, with optical absorber, eliminating the test The effect of the specular reflected light.
2, the illumination source: semiconductor light source
3, measurement method: reflection
4, repeatability ≤ 0.1
5, the indication value drift ≤ 0.1
6, zero drift ≤ 0.1
7, indication error ≤ 0.5
8, measuring hole diameter: Ф 20mm
9. Output mode: 3 digits and a half digit display, and the printer can also print the data (the printer is optional and the user can choose according to the needs)
10, working environment: temperature (0-40) ° C, relative humidity <80% RH
11, power: AC (220 ± 22) V, 50Hz (0.2A)
12, external dimensions: 220 × 295 × 375mm
13. Weight: 8.5kg Working principle The instrument uses the integrating sphere to measure the absolute spectral diffuse reflectance. The optical principle is to use the blue light emitted by the semiconductor light source to directly enter the integrating sphere. After the blue light is diffused and reflected on the inner wall of the integrating sphere, the illumination On the sample of the test port, the spectrum reflected by the surface of the sample is converted into an electrical signal by the concentrating mirror, the light column, and the color filter group, and then received by the silicon photocell; and another silicon photocell receives the substrate signal in the sphere. The two electrical signals are separately amplified and processed by the single-chip microcomputer to realize the system functions of automatic zero calibration, working whiteboard calibration, and sample testing. The user can easily use the instrument to perform whiteness testing of various samples.
Meet the following criteria:
l Comply with GB3978-83: standard lighting body and lighting observation conditions.
l Analog D65 illuminator illumination. The d/o illumination observation geometry (ISO2469) is adopted, the diameter of the diffusing sphere is φ150mm, and the diameter of the test hole is φ30mm and φ19mm. The optical absorber is provided to eliminate the influence of the specular reflection light of the sample.
l The spectral power distribution of the R457 whiteness optical system has a peak wavelength of 457 nm and a full width at half maximum of 44 nm. The RY optical system complies with GB3979-83: object color measurement method.
l GB7973-87: Diffuse reflection factor measurement method for pulp, paper and cardboard (d/o method).
l GB7974-87: paper and board whiteness determination method (d/o method).
l ISO2470: Determination of blue diffuse reflection factor for paper and board (ISO whiteness).
l GB8904.2: Determination of pulp whiteness.
l GB1840: Determination method of industrial potato starch.
l GB2913: Plastic whiteness test method.
l GB13025.2: General test method for salt industry, determination of whiteness
l GB1543-88: Determination of the opacity of paper.
l ISO2471: Paper and board opacity assay.
l GB10336-89: Determination of light scattering coefficient and light absorption coefficient of paper and pulp
/ whiteness measurement mineral l GBT 5950 non-metallic construction material.
l Citric acid whiteness and its detection method
l GB10339: Determination of light scattering coefficient and light absorption coefficient of paper and pulp.
l GB12911: Paper and board ink absorption test.
l GB2409: Plastic yellow index test method.
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