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A Remote Operation Quadrupole Mass Spectrometer Using a Custom Radio-Frequency Link Approach

Volume 28, Number 2 (April 1974) Page 171-175

Tashbar, Philip W.; Nisen, Daniel B.; Moore, W. Walding


A commercial quadrupole mass spectrometer (residual gas analyzer, RGA) system has been modified to operate at large separations of its electronics console and sensing head. The methods implemented have made practical applications, as well as operation, of such a system possible for the first time. This advance was stimulated by a need for placing sensors at remote (45 or 60 m) chamber locations for space simulation testing of orbital flight spacecraft. Emphasis is placed on instrument functional requirements and describing the hardware changes and adjustment techniques necessary to assure operation at the extended cable lengths.