Agilent Technologies 7890A Troubleshooting Manual page 11

Configurable Items to Always Keep Current
Column configuration
Automatic Liquid Sampler configuration
Gas configuration
WA R N I N G
Troubleshooting
Certain configurable items in the GC must always be kept
current. Failure to do so will lead to reduced sensitivity,
chromatographic errors, and possible safety concerns.
Reconfigure the GC every time a column is trimmed or
changed. Also verify that the data system reflects the correct
column type, length, id, and film thickness. The GC relies on
this information to calculate flows. Not updating the GC
after altering a column causes incorrect flows, changed or
incorrect split ratios, retention time changes, and peak
shifts.
Keep the Automatic Liquid Sampler (ALS) configuration
up- to- date to ensure proper operation. ALS items to keep
current include injector position, installed syringe size, and
solvent and waste bottle usage.
Always configure the GC 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.
Reconfigure the GC every time the gas type is changed. If
the GC is configured to a gas other than what is actually
being plumbed, incorrect flow rates will result.
Concepts and General Tasks
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