Infrared thermometer self-calibration method
Referring to the principles and practical work experience of blackbody furnaces, the comparison standard used in self-calibration is a self-made simple blackbody water tank with a size of 450mmx300mm, made from iron sheet, and equipped with an electric heater inside. Use a 1.5-level pressure thermometer with good stability (can be replaced by a certified glass liquid thermometer) as a standard instrument to test the temperature in the water tank, considering that the surface temperature of most organic materials, paints or oxidized surfaces is measured. Black tape or flat black paint should be applied to the surface to be measured to compensate. When the black tape or black paint reaches the same temperature as the base material, measuring the temperature of the tape or paint surface is the working experience of the true temperature. At the same time, consider the spot positioning test. Use an 80mmx80mm black tape and stick it on the liquid surface at the same depth as the pressure thermometer probe. After the water in the water tank boils for 5 minutes and the temperature field in the water tank is uniform, use the infrared tester to aim at the center point of the black tape. Comparison.
Precautions for self-calibration of infrared thermometer
skills requirement :
The basic error of the infrared thermometer and the impact of changes in measurement distance do not exceed the requirements in Table 1.
Calibration items:
Based on on-site usage conditions and practical experience, the calibration project mainly completes appearance inspection, determination of basic errors, determination of the impact of changes in measurement distance, and determination of the range of emissivity.
Calibration steps:
1) Appearance inspection, all parts are assembled intact and without defects;
2) Characters, marks, and scales should be complete and clear;
3) The appearance and parts should be well treated and free of rust and mildew;
4) If the "BAT" prompt appears, replace the battery in time;
5) The objective lens and eyepiece are not damaged, and the aiming should be clear. If the environment is dusty, the surface of the lens should be cleaned, and the dust floating on the surface should be blown off with clean air, or the dust should be brushed off with a soft brush.
