38 Agilent 7697A Troubleshooting
4 Leaks
Checking for External Leaks
Figure 3 below shows typical external leak points to check.
Check all fittings and correct as needed.
Figure 3 External leak points (HC configured with GC carrier gas
control, with optional valves and fittings shown)
• Gas supply bulkhead fittings
• Gas cylinder fittings
• Regulator fittings
• Traps
• Shut- off valves (if installed, not included in ship kit)
• Unions and tee fittings (if installed, not included in ship
kit)
• Transfer line connection to the GC
Perform a pressure drop test.
A pressure decay test cuts off carrier flow through the HS and GC.
To prevent damage to the flow path components (column, inlet liner,
and so forth), cool the HS and GC before beginning.
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