Micromeritics TriStar II 3020 Operator's Manual page 125

TriStar II 3020
Field or Button
Target Pressures
option (continued)
302-42828-01 - Dec 2012
Geometric towards saturation - select to insert geometrically spaced
points from the saturation pressure. For example, to insert 5 points with
a 0.99 starting pressure and a 0.84 ending pressure, the following points
are inserted into the table:
0.99
0.98
0.96
0.92
0.84
• Insert Predefined button - this button is disabled if Absolute pressure
dosing is selected on the previous window. The predefined pressures are
logical only if nitrogen is used as the adsorptive. These options can be
used to select the system's default pressures which can then be edited on
the Entered Pressures window.
Click the dropdown arrow to select predefined pressure points for
surface area, t-Plot micropore, and/or BJH adsorption/desorption.
Select Adsorption total pore volume, Desorption total pore volume, and/
or Saturation to include them in the Entered Pressures table.
Description (continued)
Analysis Conditions Files
5-15