Micromeritics ASAP 2460, Operator'S Manual

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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.