Keithley 2657A, Справочное руководство, Страница: 737 / 805

Appendix B: Calibration Model 2657A High Power System SourceMeter® Instrument Reference Manual
B-28 2657A-901-01 Rev. B/December 2012
Where:
-range
= The negative of the present calibration range
src_Z
= The -zero Model 2657A programmed source output value
DMM_Z_rdg
= The -zero DMM measurement
src_FS
= The -FS Model 2657A programmed source output value
DMM_FS_rdg
= The -FS DMM measurement
Typical values for the 120 mA range:
smua.source.calibratei(-120e-3, -1e-30, -1e-6, -108e-3, -107.98e-3)
22. If this step is not on the CALA sense mode, send the measure calibration command using the
multimeter and Model 2657A readings, and range setting for the parameters:
smua.measure.calibratei(
-range, Z_rdg, DMM_Z_rdg, FS_rdg, DMM_FS_rdg
)
Where:
-range
= The negative of the present calibration range
Z_rdg
= The -zero Model 2657A measurement
DMM_Z_rdg
= The -zero DMM measurement
FS_rdg
= The -FS Model 2657A measurement
DMM_FS_rdg
= The -FS DMM measurement
Typical values for the 120 mA range:
smua.measure.calibratei(-120e-3, -1e-5, -1e-6, -108e-3, -107.99e-3)
D. Before continuing, be sure to complete each of the 22 steps of C for all the source and
measurement ranges for the current source and measurement function listed in the Step
sequence (on page B-17).
E. Select automatic polarity mode:
smua.cal.polarity = smua.CAL_AUTO
Step 4. Internal calibration adjustments
Perform internal calibration adjustments on the fast analog-to-digital converter (ADC) and the
overvoltage protection circuit by calling the following functions:
Make sure both the voltage and current calibration adjustment steps have been completed before
completing this step.
smua.cal.fastadc()
smua.cal.ovp()
NOTE