Flow and Pressure Control Part 1. Electronic Pneumatic Control (EPC)
Configuration
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Configuration
The GC identifies EPC inlets and detectors and most other devices by running
presence checks during power-up. Some information must be entered manually.
This is called configuration. A few things that must be configured are:
• A description of the column (optional, but extremely desirable for capillary
columns)
• NonEPC inlets and detectors (configured at the factory, if installed there)
• The carrier gas in use
• Some detector gases (if there is a choice)
Configuration information is stored in a battery-powered section of memory
independent of line power.
VERY IMPORTANT
The 6890 with EPC measures flows and pressures continuously. This has a
strong effect on how the user sets up the instrument, and the rules for doing
so are different from the conventional approach to gas chromatography. The
differences are described in the next few pages.
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