Gas chromatograph valve leak detector

A leak test system for testing an analytical valve assembly of a gas chromatograph having at least one activation port and a plurality of analytical ports, the leak test system comprising:

• a test fixture having a manifold coupled to ports configured to seal against an activation port of the analytical valve assembly and fewer than all of the analytical ports of the analytical valve assembly, the activation port configured to control a first valving mechanism which selectively couples and blocks fluidic communication between a first pair of analytical ports of the analytical valve assembly in response to an applied pressure;
• a gas source of a gas under pressure;
• a shutoff valve which couples the gas source to the manifold, wherein when the shutoff valve is open, pressurized gas is applied to the activation port and fewer than all of the analytical ports thereby pressurizing the activation port and the fewer than all of the analytical ports;
• and
• a flow meter arranged to measure flow of gas through the manifold wherein flow of gas through the manifold which is greater than a specified limit is indicative of a leak in the the analytical valve assembly.