Report Options Files ASAP 2460 Operator’s Manual
3-46 246-42800-01 - Aug 2013
Alpha-S Method
The Alpha-S plot converts the standard adsorption isotherm into a dimensionless isotherm using the
quantity adsorbed at a relative pressure of 0.4. In the Selected Reports list box, highlight Alpha-S
Method, then click Edit.
One predefined curve is shipped with the analysis program and is located in the Reference directory.
Use the table to enter relative pressure and the alpha-s values.
Field or Button Description
Open button To import values from an existing thickness curve (.ALS file), click Open
and select the file containing the values.
The table to be imported must be saved as ASCII text with a .ALS file
extension. It must have a two-column format with the relative pressures in
the first column and the alpha-s values in the second column. Columns
must be separated by a space or a tab.
Insert / Delete / Clear /
Append buttons
Refer to Table buttons, page 3-3 for a description of the Insert, Delete,
Clear, and Append buttons.
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