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Help CenterGb/t 26704-2022 Pencil Lead Concentration Tester, Theoretical Measurement Instrument
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Product Overview:
This machine is a test instrument used to test the concentration of pencil leads. That is, to measure the reflected light density of the marks made by the pencil lead on the specified sample paper (the reflected optical density is represented by the symbol d: d = Lg1/R450, where R450 is the diffuse reflection luminance factor of the sample for blue light with a wavelength of 450nm, that is, under certain lighting conditions, in a given direction, the ratio of the reflected light luminance of the sample to the luminance of the ideal diffuse reflection light under the same conditions).
Compliance Standards:
QB/T2774 - 2006, GB/T 26704 - 2022, QB/T 1024 - 2018
Technical Parameters:
1. Eliminate specular reflection: The error is less than 0.1% of the luminance factor.
2. Measurement range: 0 ≤ d ≤ 2
3. Sample size: A square with a side length of 25mm
4. Measurement hole: A circular hole with a diameter of 22mm
5. Repeatability: The error of the luminance factor is less than 0.1%.
6. Indication error: The error of the luminance factor is less than 0.3%.
7. Power supply: 220V ± 10%, 50Hz
8. Working environment: Temperature 10 - 30℃, relative humidity ≤ 85%.
9. One accessory box (containing calibration plates, etc.)
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