Particulate Systems HPVA Series, Operator'S Manual, Page: 110 / 124

Measuring Free Space HPVA Series Operator’s Manual
B-8 Mar 2011
Displaying the Free Space
1. Open the Excel Macro.
2. Select Read Short Data File from the HPVA menu.
3. Select He Data Files (*HIHe) from the File Type drop-down list.
4. Select the helium data file created during the free space analysis. A report, which includes
Ambient Free Space and Analysis Free Space (measured in cc STP) is displayed. Below is an
example, with the free space volumes highlighted.
5. The free space volumes of the sample tube can be used for future adsorption/desorption analyses
as long as the analysis temperature does not change. We recommend that you record these volumes
for future use.