1 Installing the GC
36 Installation and First Startup
Step 9 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.
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.
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.
4 Wait 10 min. If there is a pressure loss greater than 7 kPa (1 psi), there is a leak in the
external connections. Use the leak detector to check each fitting for leaks. See Figure 11.
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