B3.2 - Long-term reliability of fiber-optic current sensors in damp heat
- Event
- AMA Conferences 2017
2017-05-30 - 2017-06-01
Nürnberg, Germany - Band
- Proceedings Sensor 2017
- Chapter
- B3 - Fiber-Optical Sensors
- Author(s)
- M. Lenner, L. Yang, A. Frank, K. Bohnert - ABB Schwitzerland Ltd., Baden-Dättwil (Switzerland)
- Pages
- 202 - 205
- DOI
- 10.5162/sensor2017/B3.2
- ISBN
- 978-3-9816876-4-4
- Price
- free
Abstract
The measurement of electric current in industrial applications is associated with stringent requirements for accuracy, reliability and availability. We set up an extensive reliability test program in order to validate the reliability of components used in fiber-optic current sensors (FOCS). For many components operated in harsh environments, damp heat is often the most crucial environmental stressor. Potential failure modes include shifts in the source wavelength, changes in birefringence of certain optical components due to stress and excessive insertion loss. Degradation can lead to sensor scale factor change, or in
extreme cases, to sensor failure. Our experiments have demonstrated that appropriately designed, packaged and burned-in components survive extended exposure to damp heat without significant performance loss.