B4.1 - Quality Assurance through Leak Testing of Telemetry Components during Production
- Event
- ETTC 2024 - European Test and Telemetry Conference
2024-06-11 - 2024-06-13
Nuremberg - Chapter
- Sustainable Testing & Materials
- Author(s)
- J. Lapsien - CETA Testsysteme GmbH, Hilden (Germany)
- Pages
- 220 - 225
- DOI
- 10.5162/ETTC2024/B4.1
- ISBN
- 978-3-910600-02-7
- Price
- free
Abstract
Products used in telemetry applications (e.g. sensors, transmitters, receivers, power supply units) must function reliably under a wide range of conditions. If they are used outdoors or are exposed to liquids or moisture, there is a risk of malfunction due to the ingress of liquids. These products must be leak-tight. During IP protection class testing, prototypes are tested in the laboratory. This is a type test. To minimise risk a leak test is integrated into the production process as routine test – usually as an end-of-line test. Every part produced is tested. The test medium compressed air is widely used. Operation and external influences lead to cyclic temperature-related pressure changes in the product. Mechanical stress on seals and seams can lead to leaks in encapsulated products. In other products, pressure compensation elements (membranes) are used to reduce this mechanical stress. These membranes are watertight but permeable to air. During the leak test, the product must be filled via the membrane. Sometimes an opening is provided in the plug connector through which the product can then be filled directly. Depending on the type of product (encapsulated, filling via a membrane, direct filling), there are specific aspects to be considered in the leak test.