Any instrument will inevitably encounter poor sealing during the production process. Minor leaks in some unimportant equipment do not matter much, but in important electrical equipment such as semiconductor devices, integrated circuits and high-end instruments, good sealing can determine the normal use of the instrument, so leak detection is very important! Helium leak detector is a high-precision device that is widely used to detect tiny leaks in various systems and equipment. Its leak detection process generally includes the following steps:
Preparation stage: Before starting the test, you first need to check the equipment to ensure that the surface of the equipment is clean and free of impurities, and all connecting parts are in normal working condition. If necessary, the equipment needs to be pre-filled to eliminate possible air residues.
Helium injection: Inject helium into the sealing system of the equipment. Helium molecules are extremely small and have strong penetrating power, so they can effectively penetrate through extremely small cracks or holes. Usually, helium is injected into the system at high pressure.
Leak detection: The helium leak detector determines whether there is a leak point by detecting the distribution of helium in the equipment. Helium inside the equipment will escape from the leak point after a certain diffusion process. The instrument uses a mass spectrometer or an infrared detector to detect the presence of these helium molecules. The mass spectrometer identifies helium by measuring its mass spectrum characteristics, while the infrared detector uses the infrared absorption characteristics of helium for detection.
Data analysis: The detector converts the detected signal into an electrical signal and generates a data report through the analysis software. The software will display the location and size of the leak to help technicians locate and quantify the leak. Usually, the data will show the concentration, flow rate, and possible leak points of the leak.
Repair and confirmation: According to the test report, the technician will repair the leak point found. After the repair is completed, the leak test needs to be re-performed to ensure that all leak problems have been completely resolved.
Recording and reporting: Finally, the detailed records and analysis results of the leak detection process are compiled into a report. This report not only includes the specific data of the leak, but also records all the important information in the detection process, providing a reference for subsequent maintenance and inspection.
Through the above steps, the Helium leak detection system can efficiently and accurately identify small leaks in the equipment, ensuring the sealing and safety of the equipment. This process plays an important role in aerospace, medical equipment, manufacturing and other fields, especially in situations where high-precision leak detection is required.