Keithley 4200A-SCS, Reference Manual

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Model 4200A-SCS Parameter Analyzer Reference Manual Section 6: Clarius
4200A-901-01 Rev. C / February 2017 6-225
Constants
The Constants tab provides constants that you can use in the formula. Click the symbol of the
constant to add it to the formula.
The definitions of the default constants are:
•
PI
π
•
K Boltzmann constant
•
Q Charge on an electron
•
M0 Electron mass
•
EV Electron volt
•
U0 Permeability
•
E0 Permittivity of a vacuum
•
H Planck’s constant
•
C Speed of light
•
KTQ Thermal voltage
You can edit the values and units of constants in the constants list. Place your cursor in the cell to
edit and make changes as needed. Changes are automatically saved for all tests.
To add a new constant to the constants list, click Add . Enter the name, value, and unit for the new
constant.
To delete a constant, select Delete . A list of constants is displayed that you can select from.
Apply Set to
This option determines which Analyze worksheets this set of formulas will apply to.
•
Future runs: Only apply this set of formulas to future test runs.
•
Checked runs: Only apply this set of formulas to test runs that are selected in the Run History
pain of the Analyze sheet.
•
Future and checked runs: Apply this set of formulas to all runs.