Concepts and General Tasks 1
Agilent 7697A Troubleshooting 11
Keeping Configuration Settings Current
Certain configurable items in the HS must always be kept
current. Failure to do so will lead to reduced sensitivity,
chromatographic errors, and possible safety concerns.
Sample loop size
Reconfigure the sample loop size whenever you change the
sample loop.
To confirm the sample loop size:
1 Press [Config].
2 Scroll to Loop Volume (mL).
Gas configuration
Reconfigure the HS every time the gas type is changed. If
the HS is configured to a gas other than what is actually
being plumbed, incorrect flow rates will result.
To confirm the gas configuration:
1 Press [Config].
2 Scroll through the display entries to see the configured
gas types.
Column configuration
If using HS carrier gas control, reconfigure the HS every
time the GC column is trimmed or changed. Also verify that
the data system reflects the correct column type, length, id,
and film thickness. The HS relies on this information to
calculate flows. Not updating the HS after altering a GC
column causes incorrect flows, changed or incorrect split
ratios, retention time changes, and peak shifts.
Always configure the HS appropriately when working with
hydrogen. Hydrogen leaks quickly and poses a safety concern if
too much of it is released into the air or into the GC oven.
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