Axis BTA 2100D Manual do Operador descarregar pdf (Página 284)

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The first row of the spreadsheet contains the Initial pressure and hold time for the

Type 1 EFC. The EFC will equilibrate to this setting when the method is

activated, and will be restored to this setting when each chromatographic run is

completed.

Rows after the first row of the spreadsheet contain the programmed settings for

each of the ramp segments. Each segment will ramp to the specified pressure at

the specified rate (assuming the rate is achievable), and then hold the pressure

for the specified time. (Note that the Rate in the first row is always blank and

cannot be edited. Also note that the entire Total column cannot be edited.)

Constant Column Flow for Type 1 EFC

Constant Column Flow mode for Type 1 EFC is enabled in the Flow/Pressure

window.

Click on the Radio Button to turn on the Constant Column Flow Mode. This mode

disables the spreadsheet and reveals the constant flow rate value.

Enter the desired Column Flow.

When the method is activated in System Control, the Varian MS Workstation will

generate and download the appropriate pressure program corresponding to the

Column Temperature program, the Column Setup Length and Diameter, the

Carrier Gas, and the ambient Barometric Pressure. These parameters are

specified at the 3800 GC front panel, and the Barometric Pressure is measured

by the 3800 at the time the Method is downloaded. The 3800 will run the

pressure program to hold the Column Flow at the specified value as the Column

Temperature is ramped during each run.

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Axis BTA 2100D Manual do Operador Página 284

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