12 Agilent 7890 Series Troubleshooting
1 Concepts and General Tasks
Systems Configured for Enhanced Communications
When configured with other instruments that support enhanced
communications, such as a 5977 MSD, 7000C Triple Quadrupole
MS, and 7697 Headspace Sampler, the 7890B GC and configured
instruments closely interact with each other. In addition to
simply sending start run commands and general status
information (ready or not ready), the instruments change their
settings based on each other’s status. For example:
• A GC shutdown may cause an MS to shut down or otherwise
protect itself.
• Venting an MS causes changes in the GC to support the
venting process.
• An MS shutdown may cause the GC to change its settings to
protect itself and the MS.
• A loss of communications between the instruments may
causes changes in one or both instruments.
• The GC sleep/wake cycle triggers the MS and HS sleep/wake
cycle (if available).
• A configured headspace sampler determines its timings
based on the loaded GC method.
Because of this interaction, always check the displays on all
instruments and in the data system to learn the complete
system status. In general, the GC display will present
configured instrument status messages as well as its own
messages.
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