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    • 11. 发明申请
    • METHOD FOR FUNCTIONALLY TESTING A LEAK DETECTOR
    • 功能测试漏电探测器的方法
    • US20120031162A1
    • 2012-02-09
    • US13201604
    • 2010-02-10
    • Randolf Rolff
    • Randolf Rolff
    • G01F25/00
    • G01L21/30G01L27/005G01M3/207
    • In order to functionally test a leak detector (20) that comprises a partial pressure sensor (21), a testing device (30) having a variable volume (33) is connected to the leak detector. Said testing device can be a syringe. By changing the volume (33), the partial pressure of the test gas contained in the ambient air is changed. A test is carried out to check whether the leak detector (20) indicates the change. According to the invention, a vacuum pumping device having mechanical vacuum pumps is not required. The method is suitable for testing vacuum systems that contain a vacuum pumping device that is used in the leak test to generate a required vacuum. The service technician can perform the functional test of the leak detector (20) separately from the system and the vacuum pumping device.
    • 为了对包括分压传感器(21)的泄漏检测器(20)进行功能测试,具有可变容积(33)的检测装置(30)连接到泄漏检测器。 所述测试装置可以是注射器。 通过改变体积(33),包围在环境空气中的测试气体的分压改变。 进行检查以检查泄漏检测器(20)是否指示变化。 根据本发明,不需要具有机械真空泵的真空泵装置。 该方法适用于测试真空系统,该真空系统包含用于泄漏测试以产生所需真空的真空泵装置。 维修技术人员可以与系统和真空泵装置分开进行泄漏检测器(20)的功能测试。
    • 14. 发明申请
    • Test gas leak detection using a composite membrane
    • 使用复合膜测试气体泄漏检测
    • US20080202210A1
    • 2008-08-28
    • US11711993
    • 2007-02-28
    • Anthony G. Liepert
    • Anthony G. Liepert
    • G01M3/04B23P17/00
    • G01M3/20G01M3/007G01M3/202G01M3/207Y10T29/49
    • A leak detector includes a leak detector inlet to receive a test gas; a vacuum pump coupled to the leak detector inlet; a test gas sensing unit connected through a passage to the leak detector inlet; and a membrane that is permeable to the test gas disposed in the passage between the leak detector inlet and the test gas sensing unit, the membrane having a permeance to the test gas that varies by less than five percent over a temperature range of T0−20 K to T0+20 K, where T0 is a design temperature. In addition, methods are provided for making a composite membrane that includes a semi-permeable membrane and a porous membrane. Furthermore, a reference leak, which includes a composite membrane is provided.
    • 泄漏检测器包括用于接收测试气体的泄漏检测器入口; 耦合到泄漏检测器入口的真空泵; 测试气体感测单元,其通过通道连接到所述检漏器入口; 以及对于设置在检漏器入口和测试气体检测单元之间的通道中的测试气体可渗透的膜,该膜具有在T 0 20K至T 0 + 20K,其中T 0 <0>是设计温度。 此外,提供了制造包括半透膜和多孔膜的复合膜的方法。 此外,提供了包括复合膜的参考泄漏。