This Information Applies To: Agilent 7697A Headspace Sampler
There is a potential leak external to the Headspace unit that can cause loss of pressure.
Steps to Follow:
This article is a troubleshooting guide for when you suspect there is an external leak in the headspace sampler (HS) when it is installed on the inlet of a GC. (Figure 1)
Figure 1: External Leaks can occur in multiple locations: 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
Warning: 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.
Learn how to effectively maintain your 7697A Headspace Sampler:
SI-7697-2100sV3 - Agilent 7697A Headspace Sampler Operation and Maintenance e-learning available from Agilent education.