Testing gas pressure tightness, esp. sulphur hexa:fluoride tightness of capacitors - placing component in container, evacuating container, then taking and measuring gas sample

摘要

A method of testing the gas tightness of components involves measuring and indicating the gas escaping from the test component which is placed in a vacuum tight container. When the component is first placed in the container the latter is evacuated with great suction power. After evacuation of the chamber a gas sample is extracted and fed to a measurement device. During the first step gas molecules attached to the component are desorbed and pumped out. USE/ADVANTAGE - Esp. for testing SF6 tightness of capacitors. Enables sensitivity of 1 in 10 million to be achieved with short response time and minimal test cycle times.