Technical Data of SFJ-231 Helium Leak Detector

Helium Leak Testing for PCB Sealed Chamer (Vacuum Mode)

This method is designed for circuit boards with independent sealed cavities, such as those integrating pressure sensors or MEMS components.

1. Preparation

• Verify the PCB assembly is complete and free of mechanical damage.
• Clean the cavity surface to remove oil and dust that could interfere with testing. Connect the cavity's vent port to the SFJ-231 helium leak detector using a DN25KF adapter, ensuring leak-free piping (pre-check with helium if necessary).
• Power on the detector with AC220V, 50Hz/60Hz supply, allow ≤2 minutes for startup, then select "Vacuum Mode" via the touchscreen and set the leak rate threshold according to design specifications.

2. Cavity Evacuation

• Activate the built-in or external vacuum pump to evacuate the cavity to a base pressure (typically ≤10Pa, adjusted for cavity volume and material) to eliminate residual air interference.

3. Helium Tracer & Leak Detection

• Apply trace helium (He⁴) externally along seams (e.g., lid-substrate interface) or internally via dedicated channels. Monitor the detector's display in real-time using numerical, bar, or curve graphs. If the leak rate exceeds the set threshold (e.g., 5.0×10⁻¹² Pa・m³/s, adjustable to product standards), record the leak rate and cavity ID.

4. Data Recording & Analysis

• Export test data via USB to generate leak reports and upload to production management systems (e.g., MES) via RS232/485 interfaces for quality traceability.

Anhui Wanyi Science and Technology Cooperated Limited Company founded in 2003, is a professional manufacturer and supplier of analytical instruments with an international vision and operational standards, whose leading products cover chromatography, spectroscopy, mass spectrometry and varieties of industrial applications such as environment monitoring, leak detection, industrial intelligence, industrial process, medical devices. The total number of employees is more than 1400, including 500 research and development engineers with 20 post doctors and 200 masters.

Wayeal has set up a world-class product research and development platform as per international standards, to form a globally synchronized research and development system on the basis of high quality, strict norms, and continuous creation. We were granted "Postdoctoral Research Station" in January 2012, and awarded "National Grade Technology R&D Center" in 2021.

With adherence to the concept of "Perfect Products", Wayeal has integrated the world's leading manufacturing resources, globalized parts procurement, and socialized manufacturing, to offer internationally assured quality products to the customers.

Wayeal has also conducted management and operation under an international perspective, and raised profound changes in integrated product development, integrated supply chain, human resource management, financial management and quality control, and established an IT-based management system actively adapted to international competitions.

Under the spirit of "Quality Wayeal, Service Wayeal", Wayeal is committed to building an enterprise with strong international competitiveness in the field of analytical instruments, industrial applications, and life health, and becoming a model of a responsible and respectable Chinese enterprise.