Infrared thermal imaging FAQ
We often have many questions during the use of infrared thermal imaging cameras, such as inaccurate temperature measurement and lagging. Today, we have compiled some questions to provide answers. Let's see if you have any doubts as well!
No.01
Why does the thermal imaging camera make a "click" sound and lag?
The instrument makes a "click" sound because it is undergoing non-uniformity correction (NUC). NUC occurs when:
The thermal imaging camera is moving quickly;
The camera has just been turned on.
Self-calibration: The thermal imaging camera automatically adjusts to counteract the impact of environmental temperature changes on detector accuracy. This process usually lasts for 2-3 seconds, during which the screen will pause and display "calibrating".
No.02
What is a black body? Do I need to use a black body with the purchase of a thermal imaging camera?
A black body is a calibration device that can change temperature.
ULIRVISION Technology's infrared products have been calibrated with a black body before leaving the factory. In general, there is no need to use a black body on your own unless you are working in an environment with significant temperature fluctuations.
Furthermore, if the thermal imaging camera shows inaccurate temperature measurement, you can contact customer service and send the product back for recalibration with a black body.
No.03
Is it necessary to preheat the thermal imaging camera?
As a professional thermal imaging manufacturer, we have to stress that all thermal imaging cameras require sufficient preheating time to obtain accurate temperature measurement results and optimal image quality. The preheating time usually varies with the model and environmental conditions.
The preheating of infrared thermal imaging cameras can be completed within 3-5 minutes. More preheating time may be required when moving between environments with large temperature differences.
No.04
If there is a temperature deviation in measuring body temperature with an industrial thermal imaging camera, does it mean that the camera is not accurate?
Thermal imaging cameras measure the surface temperature of objects.
The normal temperature of the face of a human body is about 2℃ lower than that of the armpit. Additionally, the face is more affected by the environment. The emissivity of a normal human body is 0.98. Medical temperature measurement devices will adjust the emissivity to correct the deviation and reach the body temperature threshold, but industrial thermal imaging cameras are different. Therefore, there may be certain deviations when measuring body temperature with industrial thermal imaging cameras.
No.05
Which one is better, thermal imaging cameras or thermocouples?
Thermal imaging cameras and thermocouples have different applications and advantages and disadvantages.
The advantages of infrared temperature measurement are:
Non-contact measurement, avoiding the influence of physical contact on the measured object;
Fast measurement speed, suitable for mass temperature measurement and rapid measurement;
Suitable for temperature measurement in high temperature, non-directly contactable, or inconvenient to contact situations;
Higher measurement accuracy of infrared thermal imaging cameras.
Thermocouples, on the other hand, are more advantageous for measuring internal temperatures of objects.
No.06
How to compensate for the deviation of the instrument's performance in high or low temperature environments?
You can compensate for the deviation using emissivity, reflected apparent temperature, distance, relative humidity, and atmospheric temperature.
