Keithley 2601B Reference Manual page 769

Series 2600B System SourceMeter® Instrument Reference Manual
B. Send the following commands in order to initialize voltage calibration:
smua.cal.unlock("KI0026XX")
smua.reset()
smua.source.func = smua.OUTPUT_DCVOLTS
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.
C. Perform each calibration adjustment for the voltage source and measure function step listed in
Step sequence
1. Select the range being calibrated with this command:
smua.source.rangev = range
2. Select the correct sense mode based on the calibration step for the voltage source and measure
function from the
smua.sense = smua.SENSE_LOCAL
3. Select positive polarity, and then set the source output to the positive zero value. For example:
smua.cal.polarity = smua.CAL_POSITIVE
smua.source.levelv = 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 Series 2600B voltage readings at the
positive zero 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:
Z_rdg = smua.measure.v()
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.levelv = 0.9 (Model 2601B/2602B/2604B)
smua.source.levelv = 1.8 (Model 2611B/2612B/2614B/2634B/2635B/2636B)
8. Turn on the output:
smua.source.output = smua.OUTPUT_ON
9. Allow the readings to settle, then get both the multimeter and Series 2600B voltage readings at the
positive 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.v()
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.calibratev(range, src_Z, DMM_Z_rdg, src_FS, DMM_FS_rdg)
Where:
range
src_Z
DMM_Z_rdg
src_FS
DMM_FS_rdg
2600BS-901-01 Rev. B / May 2013
(on page B-22) as follows:
Step sequence (on page B-22), for example:
= The present calibration range
= The +zero Series 2600B programmed source output value
= The +zero DMM measurement
= The +FS Series 2600B programmed source output value
= The +FS DMM measurement
Appendix B: Calibration
B-27