Helium mass spectrometer leak detection method for sealing workpiece
A helium mass spectrometer leak detector and helium mass spectrometry technology are applied in the field of helium gas leak detection, which can solve problems such as low detection accuracy, and achieve the effects of high detection sensitivity, high leak detection accuracy and improved production efficiency.
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[0031] The present invention will be further described in detail below with reference to the drawings and specific embodiments.
[0032] The commonly used method for leak detection of a completely closed container is the differential pressure method. The closed container is placed in a vacuum box and the pressure is maintained for a certain period of time after vacuuming. If the closed container leaks, the vacuum value will drop below a certain set value. The detection accuracy of this leak detection method is low.
[0033] The helium mass spectrometer leak detection method of a sealed workpiece of the present invention adopts the helium molecule pressure in and out detection method, which has the advantages of high detection sensitivity and high leak detection accuracy. The used helium-containing content is set according to the pressure requirements of the closed container to be tested. The pressure value, the higher the pressure, the higher the leak detection efficiency, which ca...
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