CALIBRATION SYSTEMS AND METHODS FOR TRACER GAS LEAK DETECTION
摘要
Tracer gas leak detection is provided by a calibration system with a gas leak detector having a test port for receiving a sample containing a tracer gas and coupled to a vacuum pump; a calibrated leak for a calibration sample containing the tracer gas; a mass filter coupled to the test port for receiving the test sample in an operating mode, coupled to the calibrated leak through a calibrated leak valve for receiving the calibration sample in a calibration mode, having controllable transmission of the tracer gas and providing a filtered sample; detector detecting the tracer gas in the filtered sample; a programmable gain element providing a measured value of leak rate in response to the detector signal; and a controller configured, in response to a mode control signal, to operate the leak detector in the calibration mode over two or more working ranges using the calibrated leak.
申请公布号
WO2010048211(A2)
申请公布日期
2010.04.29
申请号
WO2009US61363
申请日期
2009.10.20
申请人
VARIAN, INC;FLYNN, KEVIN;DODAI, CHARLES;GEIST, DANIEL J.