Micromeritics ASAP 2020 Confirm Operator's Manual page 327

Appendix B
4037- Computations failed while processing the primary data set. No reports will be
produced.
Cause:
Action:
4038- Fewer than 2 points available for the Langmuir Qm computation. Cheng/Yang
correction will not be applied.
Cause:
Action:
4039- The isotherm does not meet the constraints of the Cheng/Yang assumption.
Cheng/Yang correction will not be applied.
Cause:
Action A:
Action B:
202-42811-01 - Mar 2011
The preparation of data for reporting could not be successfully com-
pleted. No Horvath-Kawazoe reports will be produced. This message
will always be preceded with another one containing additional infor-
mation.
Refer to the number of the error message which preceded this one for
an explanation.
The Cheng/Yang correction to the Horvath-Kawazoe equation requires
the value of the monolayer volume as calculated from the Langmuir
equation. The isotherm must include at least two points above 0.02 rel-
ative pressure for the Langmuir equation to be applied.
The analysis will be performed without the Cheng/Yang correction.
Deselect Apply Cheng/Yang correction on the Horvath-Kawazoe
Report Options dialog to prevent this message from appearing on
future reports.
The Cheng/Yang correction to the Horvath-Kawazoe equation requires
the value of the monolayer volume as calculated from the Langmuir
equation. The isotherm does not correlate to the Langmuir assumption
with a coefficient of 0.98 or more. The correction is not applicable to
this isotherm or to the range of the data points selected.
The analysis will be performed without the Cheng/Yang correction.
Deselect Apply Cheng/Yang correction on the Horvath-Kawazoe
Report Options dialog to prevent this message from appearing on
future reports.
Generate the Langmuir report for the same data points selected for the
Horvath-Kawazoe report. If the Langmuir correlation coefficient can
be brought above 0.98 by removing some points at high relative pres-
sure, remove them and reproduce the Horvath-Kawazoe reports.
ASAP 2020 Confirm
B-33