Appendix B
ASAP 2460 Operator’s Manual
B-24
246-42800-01 - Dec 2013
4039-
The isotherm does not meet the constraints of the Cheng/Yang assumption.
Cheng/Yang correction will not be applied.
Cause:
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.
Action A:
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.
Action B:
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.
4040-
The value of Qm computed from the Langmuir equation is too low. The pore
size will not be computed for all data points.
Cause:
The Cheng/Yang correction to the Horvath-Kawazoe equation requires
the value of the monolayer volume as calculated from the Langmuir
equation. The computed value is less than the volume adsorbed at the
largest relative pressure included in the analysis. The correction is not
applicable to this isotherm or to the range of the data points selected.
Action:
The analysis will be performed and the Cheng/Yang correction will be
applied to all points with a volume adsorbed less than the value of Vm.
The pore size will not be calculated for data points with an invalid vol-
ume adsorbed. Deselect Apply Cheng/Yang correction on the Horvath-
Kawazoe Report Options dialog to clear this message.
Summary of Contents for ASAP 2460
Page 4: ......
Page 12: ...Table of Contents ASAP 2460 Operator s Manual viii 246 42800 01 Nov 2013...
Page 30: ...Using the Software ASAP 2460 Operator s Manual 1 18 246 42800 01 Aug 2013...
Page 93: ...ASAP 2460 Operator s Manual Generating Graph Overlays 246 42800 01 Aug 2013 2 63...
Page 94: ...Generating Graph Overlays ASAP 2460 Operator s Manual 2 64 246 42800 01 Aug 2013...
Page 202: ...Service Test ASAP 2460 Operator s Manual 4 36 246 42800 01 Aug 2013...
Page 230: ...Report Examples 2460 Operator s Manual 5 28 246 42800 01 Aug 2013 Isotherm Linear Plot...
Page 231: ...2460 Operator s Manual Report Examples 246 42800 01 Aug 2013 5 29 BET Surface Area Report...
Page 232: ...Report Examples 2460 Operator s Manual 5 30 246 42800 01 Aug 2013 BET Surface Area Plot...
Page 233: ...2460 Operator s Manual Report Examples 246 42800 01 Aug 2013 5 31 t Plot Report...
Page 236: ...Report Examples 2460 Operator s Manual 5 34 246 42800 01 Aug 2013...
Page 242: ...Service Test Mode 2460 Operator s Manual 6 6 246 42800 01 Aug 2013...
Page 270: ...Calibrating the System ASAP 2460 Operator s Manual 7 28 246 42800 01 Aug 2013...
Page 276: ...Ordering Information ASAP 2460 Operator s Manual 8 6 246 42800 01 Aug 2013...
Page 278: ......
Page 280: ......
Page 374: ...Appendix C ASAP 2460 Operator s Manual C 50 246 42800 01 Aug 2013...
Page 398: ...Appendix F ASAP 2460 Operator s Manual F 18 246 42800 01 Aug 2013...
Page 412: ...Index ASAP 2460 Operator s Manual Index 8 246 42800 01 Aug 2013...
Page 413: ...ASAP 2460 Operator s Manual Appendix G Aug 2013 SVP 1 SVP Smart VacPrep Operator Manual...
Page 414: ...Appendix G ASAP 2460 Operator s Manual SVP 2 Aug 2013...
Page 422: ...Contact Us vi Smart VacPrep Operator Manual...
Page 432: ...2 About the Software 2 4 Smart VacPrep Operator Manual...
Page 466: ...8 Error Messages 8 4 Smart VacPrep Operator Manual...