This paper mainly discusses and analyzes the uncertainty of the calibration results of the display error of the reflectance meter as follows:
1. Measurement method of reflectivity meter
Preheat the reflectance meter first, then use a standard white board to calibrate the reflectance meter, and measure another standard white board. The difference between the average measured value R of the instrument and the nominal value R of the standard whiteboard is the indication error δR.
2. Mathematical model of reflectance measuring instrument
