1．氦质谱检漏仪（Helium Mass Spectrometer Leak Detector） 氮质谱检漏仪：用氦气作示漏气体，以气体分析仪检测氦气而进行检漏 的质谱仪。它具有性能稳定、灵敏度高的特点。
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In order to gain the real leak rate under simulating operating conditions, using the pressurized leak detection method of helium mass spectrometer leak detector, the accurate data are obtained.
为了直接获得工作状况下的漏率，在模拟工况条件下，采用氦质谱检漏仪正压检漏法可满足这样的要求。
Using the helium mass-spectrometer leak detector to detect the leak of seams between the tube and face-flange and measure the total leakage rate are introduced in this paper.
介绍了核电站蒸汽发生器管子-管板焊缝的氦质谱检漏及总漏率测试方法的研究及为提高检测灵敏度所采取的措施。
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