Keithley 2601B Reference Manual page 774

Appendix B: Calibration
Typical values for the 100 mA range:
smua.source.calibratei(100e-3, 1e-30, 1e-5, 90e-3, 88e-3)
12. If this step is not on the CALA sense mode, send the measure calibration command using the
multimeter and Series 2600B readings, and range setting for the parameters:
smua.measure.calibratei(range, Z_rdg, DMM_Z_rdg, FS_rdg, DMM_FS_rdg)
Where:
range
Z_rdg
DMM_Z_rdg
FS_rdg
DMM_FS_rdg
Typical 100 mA range values:
smua.measure.calibratei(100e-3, 1e-6, 1e-5, 0.089, 0.088)
13. Select negative polarity, then set the source output to the negative zero value, for example:
smua.cal.polarity = smua.CAL_NEGATIVE
smua.source.leveli = -1e-30
14. Turn on the output:
smua.source.output = smua.OUTPUT_ON
15. Allow the readings to settle, then get both the multimeter and Series 2600B current readings at the
negative zero value (the Series 2600B measurement is not necessary if this calibration step is being
done on the CALA sense). The two measurements should be made as close as possible in time. Use
this command for the Series 2600B:
Z_rdg = smua.measure.i()
16. Turn off the output:
smua.source.output = smua.OUTPUT_OFF
17. Set the source output to the negative full-scale value, for example:
smua.source.leveli = -90e-3
18. Turn on the output:
smua.source.output = smua.OUTPUT_ON
19. Allow the readings to settle, then get both the multimeter and Series 2600B current readings at the
negative full-scale output value (the Series 2600B measurement is not necessary if this calibration step
is being done on the CALA sense mode). The two measurements should be made as close as possible
in time. Use this command for the Series 2600B:
FS_rdg = smua.measure.i()
20. Turn off the output:
smua.source.output = smua.OUTPUT_OFF
21. Send the source calibration command using the -range, -zero and -FS multimeter readings, and -zero
and -FS source values for the parameters:
smua.source.calibratei(-range, src_Z, DMM_Z_rdg, src_FS, DMM_FS_rdg)
Where:
-range
src_Z
DMM_Z_rdg
src_FS
DMM_FS_rdg
B-32
Series 2600B System SourceMeter® Instrument Reference Manual
= The present calibration range
= +zero Series 2600B measurement
= The +zero DMM measurement
= +FS Series 2600B measurement
= The +FS DMM measurement
= The negative of the present calibration range
= The zero Series 2600B source output value
= The zero DMM measurement
= The FS Series 2600B source output value
= The FS DMM measurement
2600BS-901-01 Rev. B / May 2013