Notes on how to self-calibrate an infrared thermometer
Technical requirements :
Infrared thermometer basic error and the effect of changes in measurement distance does not exceed the provisions of Table I.
Calibration project:
According to the field use and practical experience, the calibration project mainly completes the appearance check, the determination of the basic error, the determination of the impact of changes in the measuring distance and the emissivity of the
range determination.
Calibration steps:
1) Appearance check, each part of the assembly is intact, no defects;
2)Characters, marks and scales should be complete and clear;
3)Appearance and parts should be well treated, no rust and mould spots;
4) If there is a "BAT" prompt, replace the battery in time;
5) Objective lens, eyepiece without damage, aiming should be clear, if the environment is dusty, should clean the surface of the lens, use clean air to blow off the surface dust, or use soft bristle brush off the dust.
Infrared thermometer self-calibration method
With reference to the principle of black body furnace and practical work experience, in the self-calibration of the standard used in the comparison is a homemade simple black body water tank, water tank specifications for 450mmx300mm, since the tin production, the interior is equipped with an electric heater. With a piece of good stability 1.5 level pressure thermometer (can be checked instead of the glass liquid thermometer) as a standard device to test the temperature of the tank, taking into account the surface temperature measurement due to the majority of organic materials, paint or oxidised surfaces should be measured with a black tape or glossy black paint coated on the surface to be measured to compensate for the black tape or black paint to reach the same temperature as the substrate material, the measurement of the surface of the tape or lacquer Temperature, that is, the true temperature of the work experience. At the same time consider the spot positioning test, with 80mmx80mm black tape pasted on the liquid surface at the same depth as the probe of the pressure thermometer, to be the water in the tank after boiling for 5min, the temperature field in the tank is uniform with an infrared tester aiming at the centre of the black tape for comparison.
