Infrared thermal imager is an advanced tool for measuring the surface temperature of objects. The correct usage includes the following points: 1. Preparation: Make sure the equipment is in good condition and the power is sufficient, and select the appropriate infrared thermal imager as needed. Ensure that the operators are familiar with the basic functions and operating procedures of the equipment. 2. Environmental conditions: Ensure the stability of the test environment and avoid direct glare, interference sources or airflow. If necessary, use auxiliary tools, such as a visor, a protective cover or a fan. 3. Infrared measurement: By setting the measurement mode and adjusting the parameters such as temperature range and color image, the best thermal imaging effect can be obtained. Before measurement, the surface of the measured object should be cleaned to avoid obstacles affecting the measurement results. 4. Angle and distance: Choose the appropriate observation angle and measurement distance to ensure that the target object is clearly represented in the image. Follow the suggestions in the equipment manual and pay attention to the best working distance of infrared thermal imager. 5. Data analysis: By observing the thermal imaging images, analyze the temperature distribution and abnormal areas, and look for possible problems. Pay attention to the subjectivity of image interpretation and make reasonable judgments in combination with the actual situation.