Degas Conditions

  In 21CFR11 environments, this section is applicable only to members of the Developer group, however, members of the Analyst group may find information in this section helpful. Parameter file information that is available to Analysts is created by a member in the Developer group using information in this section.

(or click the Degas Conditions tab when in Advanced option presentation)

Degassing is a required step in preparation for an analysis. The Degas Conditions tab provides settings that will be automatically applied during the degassing procedure.

Degas Conditions Fields and Buttons Table
Field or Button Description
Backfill sample tube [check box]

Indicate if the sample tube should be backfilled automatically or wait for operator response.

Degas Conditions [drop‑down box] Use to browse for a .DEG file that contains degas condition parameters to be used in the analysis.
Evacuation and Heating Phases Hold pressure. Pressure at which heating will stop and hold the sample temperature approximately constant until the pressure falls below the Hold pressure. This prevents damage to the sample structure due to 'steaming' and /or elutriation due to excessive escaping gas velocity.
Evacuation Phase

Options provide conditions for the evacuation phase of the degassing operation.

Temperature ramp rate. Rate at which the temperature is to change when advancing to the target pressure.

Target temperature. Targeted temperature for evacuation.

Evacuation Rate. Rate used for evacuation.

Unrestricted evac. from. Pressure at which the unrestricted evacuation is to begin.

Vacuum level. Evacuation time starts when the vacuum level is reached.

Evacuation time. Length of time for preliminary evacuation before proceeding with the Heating Phase temperature schedule. The timer starts when the vacuum level is reached.

Heating Phase

Options provide conditions for the heating phase while degassing.

Ramp rate. The rate at which the temperature will change while advancing to the hold temperature.

Hold temp. Temperature at which the sample is to be held while degassing.

Hold time. How long the sample is to be held at the specified temperature before beginning to cool down.

  For fields and buttons not listed in this table, see Common Fields and Buttons.
 
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