Installing the GC 1
Agilent 7890B Installation 33
Step 5. Leak test all connections and set source pressures
Liquid leak detectors, such as soapy water, are not
recommended, especially in areas where cleanliness is very
important. If there is a leak, these liquids can contaminate the
plumbing and affect your analyses. If you do use leak detection
fluid, immediately rinse the fitting to remove the soapy film.
When checking for leaks of hydrogen or helium, Agilent
recommends the G3388B leak detector, or similar.
Perform a pressure drop test.
1 Turn off the GC.
2 Set the regulator pressure to 415 kPa (60 psi).
3 Fully turn the regulator pressure adjustment knob
counterclockwise to shut the valve.
To avoid a potential shock hazard when using liquid detection
fluid, turn the GC off and disconnect the main power cord. Be
careful not to spill leak solution on electrical leads.
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