Infrared thermal imaging camera turns off by itself most probable is because the battery is exhausted.
You could replace the battery or connect the power adapter to continue using thermal imaging camera
Why is there no infrared thermal image when the camera is turned on
Why does the image of the thermal imaging camera turn black and white?
What should l do if the thermal imagina camera cannot be started
5. What should l do when the thermal imaging camera battery power consumption is too fast?