Variable primary pumping speed for a tracer gas leakage detector

Gas from an entry (9) which may contain tracer elements indicating a leak is tested by a mass spectrometer (1) using primary and secondary pumps (6,3). The primary pump (6) has a drive (19,20) which enables it to vary between two speeds. The speeds are captured (21), conveyed to a computer (22) and...

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Bibliographische Detailangaben
Hauptverfasser:	ROUVEYRE, FREDERIC, PIERREJEAN, DIDIER, SEIGEOT, BERTRAND
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	MEASURING PHYSICS TESTING TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR
Online-Zugang:	Volltext bestellen
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Beschreibung
Zusammenfassung:	Gas from an entry (9) which may contain tracer elements indicating a leak is tested by a mass spectrometer (1) using primary and secondary pumps (6,3). The primary pump (6) has a drive (19,20) which enables it to vary between two speeds. The speeds are captured (21), conveyed to a computer (22) and used to identify and eliminate that part of the mass spectrograph tracer gas signal which is due to a parasitic helium secondary pump counterflow