Micromeritics TriStar II 3020 Operator's Manual page 123

TriStar II 3020
Field or Button
Absolute pressure
dosing checkbox
Isotherm Collection
group box
Target Pressures
option
302-42828-01 - Dec 2012
Select to specify pressure targets in mmHg, mbar, or kPa rather than relative
pressure. This option is typically selected when using adsorptives at
analysis conditions above the critical point of the gas; for example, H
adsorption on carbon at liquid nitrogen temperature.
Specify how isotherms are to be collected: Target Pressures or Dose
Increments.
Select to have isotherms collected by specifying target pressures. Select this
option to enable the Pressures and Options buttons.
• Pressures button - click to edit the Entered Pressures table. Use this
window to manually enter the pressures using the Insert Range button
or use the Insert Predefined button to insert default system values.
A pressure table consists of relative pressure points (and possibly
calculation assignments) at which data (isotherms) are to be collected. The
relative pressures may span the entire range of 0.00000001 to 0.995 p/p
There must be one adsorption branch followed optionally by one desorption
branch.
Description (continued)
Analysis Conditions Files
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