This knowledgebase article is to provide general information about how to do a leak test using the Service Mode key on the 7890 GC. The Leak Check can be used for the Split/Splitless (SS), Multimode (MMI) and Programmable Temperature Vaporization (PTV) Inlets..
- Used to evaluate the leak rate, and identify the source of leaks in these Inlet Systems
- Useful for leaks > 2-3 ml/minute
G3440A / G3440B / 7890 / 7890A / 7890B