Perform a Sample Tube Free Space Analysis
Unit [n] > Sample Tube Free Space
Use Sample Tube Free Space to select sample tube files (.STB), a free space gas, and method to perform a free space analysis. The ambient and analysis free space values are stored in the sample tube file. Once the free space is measured and stored in the sample tube file, the sample tube file can then be selected in the sample file. Then the operator can set the free space operation to Calculate.
The sample tube free space has as inputs the free space gas to use, the method to use (to obtain the preparation options), the bath temperature, and the target sample tube files. The outputs are the target sample tube files with updated analysis/ambient temperature free space values.
Once configured, the operator does not need to run a free space analysis on each sample. It is calculated from the measured, empty tube free space corrected by the sample mass and density.
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In the Sample Tube Free Space window, select a method, free space gas, and sample tube file needed to perform free space analysis. Or click New or Browse to create a new or edit an existing sample tube file. Ensure that an empty sample tube is attached to the selected ports for the sample tube free space analysis.
- Click Next.
After clicking Next, acknowledge that empty sample tubes have been installed on the selected ports by clicking Next again. Wait for the free space measurement to complete.
Run an analysis with the updated sample file
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Go to File > New Sample to create a new sample file or File > Open to open an existing sample file.
On the Sample Description tab, click the drop-down arrow in the Sample tube field and select the updated sample tube file to be used for free space analysis.
The Sample mass and Density fields must be correctly entered to calculate the volume in the sample tube displaced by the sample. This is used by the free space Calculate option. |
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Go to the Analysis Conditions tab and click Free Space.
- Select Calculate.
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Save the sample file and run the analysis.