Whiteness meters are mainly used to directly measure the whiteness value of objects or powders with flat surfaces. It can be widely used in whiteness measurement of textile printing and dyeing, paints and coatings, chemical building materials, paper and cardboard, plastic products, white cement, ceramics, enamel, talcum powder, starch, flour, salt, detergents, cosmetics and other substances.
This instrument has passed strict testing and debugging. The instrument complies with JJ G 512-2002 Whiteness Meter calibration procedures, and complies with GB3978, GB3979, GB7973, GB7974, ISO2470, GB8904.2, QB1840, GB2913, GB13025.2, GB1543, I SO2471, GB10339, GB5950, GB12911, GB2409 and other standards.
* It consists of light source, optical system, detection system, data processing and display system. The whiteness calculation formula of this instrument is blue light whiteness R457.
* Using high-quality imported components, good reliability. Reasonable and concise optical path design.
* Using a modified color filter system, it can quantitatively reflect the whiteness value after fluorescent whitening.
* No need to preheat after turning on, measurement can be carried out after simple calibration, easy to operate.
* Has data storage and reading functions. Can store 254 sets of data.
* Use "USB data line output" and "RS-232 data line output" to communicate with PC.
* Provide "Bluetooth data output" selection.
The light source of the instrument uses 457nm long-life LED, which meets the light source requirements specified in JJ G 512-2002 National Metrology Verification Regulations. The measurement and reception of the instrument adopts the principle of photoelectric effect.
The radiance energy value of the diffuse reflection on the surface of the pattern is received by the photocell. After being amplified by a high-precision automatic zero-stabilizing operational amplifier, it is input to the calibration circuit for energy value calibration, and then the energy value is calibrated by
The digital display directly displays the whiteness value of the sample.