The decorative performance of the coating film is a comprehensive index, which is related to the smoothness, gloss and fullness of the coating film, and the index that characterizes this technical performance is the freshness.
TR 5420 is an ideal instrument for measuring the decorative properties of coating films, which can grade the coating films, especially those on the surface of luxury cars, and measure the freshness grade data simply and intuitively.
The TR 5420 is a portable instrument that combines photoelectric and photoelectric properties, and its principle is to reflect the digital on the digital board in the observation hole by the irradiation of light and the reflection of the measured surface. Through the naked eye observation of the surveyor, the DOI value of the freshness level is read to achieve the purpose of measuring the decorative performance index of the coating surface, and the higher the DOI value, the better the freshness.
The instrument is composed of several parts: shell, imaging chamber, optical path, eyepiece and panel.
The route of light is shown in the figure：
TR 5420 – DOI Tester
·Power supply: Dc6V, 600Ma, 4 batteries of 1# (self-provided) or external
·Operating Environment:
1. Temperature 0-40°C
2. Relative humidity is not more than 85%
3. The surface area of the measured object shall not be less than 60mm*60mm
4. The surface of the measured object is flat
·Dimensions (LxWxH): 227mmx138mmx177mm, weighing about 2.5Kg
