Sample Tube
File > Open > [.STB File]
(or click Edit next to the Sample Tube selection on the Sample Description tab when in Advanced option presentation)
Sample Tube files specify information about the sample tube.
Field or Button | Description | ||
---|---|---|---|
Ambient free space [text box] |
Empty sample tube gas capacity measured at room temperature. |
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Analysis free space [text box] |
Empty sample tube gas capacity measured with the dewar raised. |
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Load from Sample File [button] | Loads parameters from the selected sample file. | ||
Non-ideality factor [text box] |
Compensates for the forces of attraction between molecules in a real gas. This value is used for a calculated free space. | ||
Sample tube [drop‑down box] |
It is a good practice to label each sample tube with a unique identification. Enter that information here. This information will also appear in the Sample Tube drop-down list on the Sample Description tab. | ||
Use filler rod [check box] |
Select if a filler rod is to be used in the sample tube. A filler rod reduces the stem free space volume resulting in reduction of free space error. It is generally a good practice to use filler rods for samples having less than 100 square meters of total surface area. | ||
Use isothermal jacket [check box] |
Select if an isothermal jacket is to be used. An isothermal jacket maintains a constant temperature profile along the sample tube stem during an extended analysis of more than 1 or 2 hours. | ||
Vacuum seal type [group box] | Select the seal type to be used. | ||
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