Overview
The C84-ⅲ reflectivity meter is a special instrument developed by SHIBO for the implementation of international standards and national standards in the chemical industry such as coatings, pigments, inks, etc. It can be used for the determination of the hiding power of paint films.
Features
1. Designed for the implementation of international and national standards in the chemical industry
2. Fully compliant with ISO3906-1980 (E), GB/T13452.3-92, GB9270-88, GB5211.17-88 standards
3. Repeatability up to 0.3%
4. indication interval 0~ 100
5. Strong environmental adaptability, temperature 20 ° +/- 5 °, Humidity < 85%
Principle
The instrument consists of Probe, main body, standard board and working ceramic board. Probe adopts the principle of 0 ° irradiation and diffuse reflection reception. When the reflected light of the sample acts on the surface of the silicon Photocell, photovoltaic cell generates electrical signals, which are input to the DC amplifier for amplification and reading display.
Applications
Coatings, pigments, inks
Standards
ISO3906-1980(E)、GB/T13452.3-92、GB9270-88、GB5211.17-88
Steps
1. Connect the Probe to the electric control box, connect the power supply, turn it on and preheat for 10-15 minutes, and put the Probe on the black standard board.
2. Zero correction: Probe is placed on the black standard board, adjust the zero correction knob to make the display 000.0, and allow changes of +/- 0.1
3. Calibration Standard value: Probe is placed on the white standard board, adjust the calibration knob to make the display value consistent with the calibration of the white standard board, allow change +/- 0.1, and adjust it repeatedly
4. Measurement RB value: Probe moved to the black working ceramic plate with the sample and read the displayed value
5. measurement RW value: Probe moved to the white working ceramic plate with the sample, read the displayed value
6. Calculate the contrast ratio: contrast ratio = RB/RW × 100%
Notice
• Preheat for 10-15 minutes
• Probe should be placed on a black standard board when preheating
• Zero and calibration allowed changes +/- 0.1
• The zero and calibration standards need to be adjusted repeatedly
• Operating Ambient Temperature should be kept at 20 ° +/- 5 °
• Working environment relative humidity should be less than 85%
• Power supply voltage should be 220V +/- 10% 50Hz
