Generating Graph Overlays ASAP 2460 Operator’s Manual
2-58 246-42800-01 - Aug 2013
Multiple Graph Overlays
The overlay process allows the importing of pore-size distribution data from an ASCII text file. The
ASCII text file must follow the format rules outlined below.
Multiple graph overlays can only be generated for:
• BJH Adsorption/Desorption
• Dollimore-Heal Adsorption/Desorption
• Horvath-Kawazoe
• DFT Pore Size/Surface Energy
•M-P Method
ASCII text file format rules
• The header must consist of one line to include title, two unit specifications, and distribution type:
- Accepted pore dimension units are: A, nm, um
- Accepted pore volume units are: cm3/g cm
3
/g, ml/g
--Accepted distribution types are: cumulative, incremental
Two examples of a header format:
My Title (A, cm3/g incremental)
My Title (A, cm3/g, cumulative)
• The data must be in two columns and should be separated by a comma or white-space.
• The data lines must be ordered so that pore dimensions are monotonically increasing or decreasing.
Sample ASCII text file
silica alumina bjh ads (A, cm3/g, cumulative)
456.657 0.0133559
444.847 0.0546427
429.168 0.0869924
425.419 0.119721
419.629 0.132681
360.634 0.156611
340.859 0.197672
326.601 0.233092
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