Keithley 2601 Reference Manual page 458

Section 16: Calibration
d. Be sure to complete steps a through v for all six voltage steps in
e. Select auto polarity mode:
16-12
24) Typical values for the Model 2611/2612/2635/2636 2V range:
smua.source.calibratev(-2,-1e-10,-1e-4,-1.8,-1.805)
25) If this step is not on the CALA sense mode, send the measure calibration command
using the multimeter and Series 2600 readings, and range setting for the
parameters:
26) smua.measure.calibratev(-range,Z_rdg,DMM_Z_rdg, FS_rdg,DMM_FS_rdg)
Where:
-range
Z_rdg
DMM_Z_rdg
FS_rdg
DMM_FS_rdg
Typical Model 2601/2602 1V range values:
smua.measure.calibratev(-1,-1e-4,-1e-6,-0.89,-0.896)
27) Typical Model 2611/2612/2635/2636 2V range values:
smua.measure.calibratev(-2,-1e-4,-1e-6,-1.81,-1.805)
or Table 16-5 before continuing with current calibration.
smua.cal.polarity = smua.CAL_AUTO
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Series 2600 System SourceMeter® Instruments Reference Manual
negative of the present calibration range
-zero 2600 measurement
-zero DMM measurement
-FS 2600 measurement
-FS DMM measurement
Table 16-2, Table
2600S-901-01 Rev. C / January 2008
16-3,