Application of online whiteness meter

Application of online whiteness meter

1. Overview
The DH-WT digital whiteness meter can be applied to measure the whiteness of objects such as textile printing and dyeing, paint and coatings, chemical building materials, paper and cardboard, plastic products, white cement, ceramics, enamel, porcelain clay, talcum powder, starch, flour, salt, detergents, cosmetics, etc.

The DH-WT digital whiteness meter consists of a light source, optical system, detection system, data processing and display system, etc. The overall whiteness value is blue light R457.

Application of online whiteness meter

2. Working principle

The instrument utilizes the principle of photoelectric conversion and adopts an analog-to-digital conversion circuit to measure the radiance energy value reflected from the surface of the sample. After signal amplification, A/D conversion, and data processing, the corresponding whiteness value is displayed.

3. Purpose:

The DH-WT digital whiteness meter is mainly suitable for measuring the whiteness of white and near white objects or powder surfaces. It can obtain a whiteness value that is equal to the visual sensitivity. The opacity of paper can be accurately measured.

Usage
1. Power on: Connect the power, the monitor starts counting down from 120.0, and after two minutes, the standard value on the back of the standard whiteboard will be displayed.

2. Zero adjustment: Place the black tube into the sample port, press zero, and after 3 seconds, it will display 0.0.

3. Calibration: Remove the black tube, place the working whiteboard into the sample port, press calibration, and after 3 seconds, the whiteness value of the working whiteboard will be displayed.

4. Measurement: Place the test item into the sample port, and the displayed value is the whiteness value of the item.

5. Preparation of powder sample: Brush the powder sample box clean with a clean brush, place frosted glass in the cover, and tighten the powder sample tray,

Gently place the sample to be tested into the powder box and scrape off any excess flat surface. Place the pressure block on top, rotate the powder press, and turn the handle smoothly,

When you hear the clattering sound, it is considered that the sample has been compacted. Rotate the handle 720 ° in reverse, remove the powder compactor, take out the compactor, and cover it with plastic

Bottom box, flip the powder sample box, unscrew the cover, remove the frosted glass, place the powder sample box into the sample port, and the displayed data is the whiteness of the sample.