2606B System SourceMeter® Instrument Reference Manual
Appendix B: Calibration
2606B-901-01 Rev. B / May 2018
B-21
It is not necessary to set the measure range when following this procedure for calibration because
the measure range is locked to the source range when measuring the source function.
Be sure to complete the steps for the 100 nA to 1 A ranges before continuing with 3 A calibration.
Perform each calibration step listed in step sequence for the 100 nA through 1 A ranges as follows:
1. Select the range being calibrated:
smua.source.rangei = range
2. Select the correct sense mode:
smua.sense = smua.SENSE_LOCAL
3. Select positive polarity, then set the source output to the positive zero value:
smua.cal.polarity = smua.CAL_POSITIVE
smua.source.leveli = 1e-30
4. Turn on the output:
smua.source.output = smua.OUTPUT_ON
5. Allow the readings to settle, then get both the multimeter and 2606B current readings at the
positive zero value (the 2606B 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 2606B:
Z_rdg = smua.measure.i()
6. Turn off the output:
smua.source.output = smua.OUTPUT_OFF
7. Set the source output to the positive full-scale value for the present range, for example:
smua.source.leveli = 90e-3
8. Turn on the output:
smua.source.output = smua.OUTPUT_ON
9. Allow the readings to settle, then get both the multimeter and 2606B current readings at the
positive full-scale output value (the 2606B measurement is not necessary if calibration 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 2606B:
FS_rdg = smua.measure.i()
10. Turn off the output:
smua.source.output = smua.OUTPUT_OFF
11. 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
= The present calibration range
src_Z
= The +zero 2606B source output value
DMM_Z_rdg
= The +zero DMM measurement
src_FS
= The +FS 2606B source output value
DMM_FS_rdg
= The +FS DMM measurement