Surface emission of two-color pyrometers
The slope is the ratio of the emissivity in the monochrome broadband temperature measurement mode to the emissivity in the monochrome narrowband temperature measurement mode, which will be used when calculating the measured temperature in the two-color temperature measurement mode. Since the emissivity of the narrowband mode cannot be adjusted, it is obtained by dividing the monochromatic broadband emissivity by the slope value.
If you need to pay attention to the narrowband temperature, make the narrowband emissivity greater than 1.00 (or less than 0.10) by adjusting the slope and broadband emissivity.
Emissivity is a measure of an object's ability to radiate infrared light. This value can be from {{0}} (mirror) to 1.0 (black body), if the emissivity setting is greater than the actual emissivity, the sensor head will read low. For example, if the actual emissivity of the object is 0.9 and the set value is 0.95, the measured temperature will be low.
1. Use a probe (such as RTD), thermocouple, or other suitable methods to measure the actual temperature of the object. Adjust the value of emissivity until the temperature reading of the sensor head is the same as the actual temperature, that is, the correct emissivity is obtained.
2. If part of the surface of the object can be coated, the surface of the object can be blackened with matte carbon black. At this time, the emissivity is about 0.98. Set the emissivity to 0.98, and measure the temperature of the blackened part. Finally, measure the area adjacent to the blackened part of the object and adjust the emissivity until the temperature reading equals the actual temperature. The correct emissivity is then obtained.
