Micromeritics ASAP 2020 Confirm Operator's Manual page 336

ASAP 2020 Confirm
4077- Cannot get surface area for: (file name)
Cause:
Action A:
Action B:
4078- Slope and Y-Intercept cannot be determined from the selected points.
Cause:
Action:
4079- Points found with negative pressure values will not appear on the graph.
Cause:
Action:
B-42
The Isotherm report for the named overlay file has Per gram selected
for the Volume Adsorbed, and the Isotherm report for the primary file
has a surface area option selected for the Volume Adsorbed.
Edit the Isotherm report for the named overlay file and select a surface
area option for Volume Adsorbed.
Click on the Report options dialog of the primary file and
Overlays
remove the named overlay file from the list.
The Langmuir report cannot be generated from the selected points.
Edit the calculation assignments in the Langmuir column on the
Collected Data dialog.
Collected data contains negative pressure values.
Negative pressure points are automatically removed from isotherm
graphs. If you wish to have negative pressure values appear on the
graph: Open the sample file and click the Collected Data tab.
Deselect Use calculation assignments and then select the points with
negative pressures as Outliers.
Appendix B
202-42811-01 - Mar 2011