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11
Options
About Options
Calibration
Maintaining EPC calibration—inlets, detectors, PCM, and AUX
186
The [Options] key is used for a group of functions that are
usually set on installation and seldom changed afterward. It
accesses this menu:
Calibration
Communication
Keyboard and Display
Press [Calibration] to list the parameters that can be
calibrated. These include:
• Inlets
• Detectors
• ALS
• Columns
• Oven
• Atmospheric pressure
In general, you will only need to calibrate the EPC modules
and capillary columns. ALS, oven, and atmospheric pressure
calibration should only be performed be trained service
personnel.
The EPC gas control modules contain flow and/or pressure
sensors that are calibrated at the factory. Sensitivity (slope
of the curve) is quite stable, but zero offset requires periodic
updating.
Flow sensors
The split/splitless and purged packed inlet modules use flow
sensors. If the Auto flow zero feature (see
they are zeroed automatically after each run. This is the
recommended way. They can also be zeroed manually—see
"To zero a specific flow or pressure
page
186) is on,
sensor."
Operation Manual
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