Keithley 2657A User Manual

A
ppendix 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

Keithley 2657A Specifications

General

Brand	Keithley
Model	2657A
Category	Measuring Instruments
Language	English