Office stationery testing equipment

Product description:

This machine is a kind of testing instrument used for determining the concentration of pencil leads. That is, to measure the reflected optical density of the scratch marks left by the lead core on the specified sample paper (represented by the symbol d for the reflected optical density: d=Lg1/R450, where R450 is the luminance factor of the sample's diffuse reflection of blue light with a wavelength of 450nm, that is, under certain lighting conditions, in a given direction, the luminance of the sample's reflected light to the ideal diffuse reflection luminance under the same conditions.

Comply with standards:

Comply with the relevant requirements of Standard 5.5 in QB/T2774-2006.

Technical parameters:

1. Eliminate specular reflection: The error is less than 0.1% of the luminance factor and has no impact on concentration measurement.

2. Measuring range: 0≤d≤2

3. Sample size: Square with a side length of 25mm

4. Measuring hole: Circular with a diameter of 22mm

5. Repeatability: The luminance factor error is less than 0.1%

6. Indication error: The luminance factor error is less than 0.3%

7. Power Supply: 220V±10%, 50Hz

8. Working environment: Temperature 10-30℃, relative humidity ≤ 85%

9. Dimensions (length * width * height) : 365*245*430mm

10. Instrument weight: Approximately 11 kilograms