Keithley 2651A Reference Manual page 520

Section 7: Command reference
Usage
smuX.source.calibrateY(range, cp1expected, cp1reference, cp2expected, cp2reference)
X
Y
range
cp1expected
cp1reference
cp2expected
cp2reference
Details
This function generates and activates new calibration constants for the given range.
The positive and negative polarities of the source must be calibrated separately. Use a positive value for range to
calibrate the positive polarity and a negative value for range to calibrate the negative polarity. Do not use 0.0 for
a negative calibration point as 0.0 is considered a positive number.
Typically the two calibration points used will be near zero for calibration point 1 and 90% of full scale for
calibration point 2. Full scale for calibration point 2 should be avoided if the SMU's source is substantially out of
calibration.
The two reference measurements must be made with the source using the active calibration set. For example,
source a value, measure it, and do not change the active calibration set before issuing this command.
The new calibration constants will be activated immediately but they will not be written to nonvolatile storage.
Use smuX.cal.save() to commit the new constants to nonvolatile storage.
The active calibration constants will stay in effect until the instrument is power cycled or a calibration set is
loaded from nonvolatile storage with the smuX.cal.restore() function.
This function will be disabled until a successful call to smuX.cal.unlock() is made.
Example
smua.source.calibratev(1, 1e-10, 1e-5, 0.9,
0.903)
Also see
smuX.cal.restore()
smuX.cal.save()
smuX.cal.unlock()
smuX.measure.calibrateY()
Calibration (on page B-1)
7-212
Model 2651A High Power System SourceMeter® Instrument Reference Manual
Source-measure unit (SMU) channel (for example, smua.source.calibratev()
applies to SMU channel A).
SMU source function (v = voltage, i = current).
The measurement range to calibrate.
The source value programmed for calibration point 1.
The reference measurement for calibration point 1 as measured externally.
The source value programmed for calibration point 2.
The reference measurement for calibration point 2 as measured externally.
(on page 7-179)
(on page 7-180)
(on page 7-181)
(on page 7-193)
SMU channel A calibrates voltage source
using the following values: calibrate the
1 V range, 1e-10 for +zero source output
value, 1e-5 for +zero DMM measurement
reading, 0.9 for +FS source output value,
and 0.903 for the +FS DMM measurement
reading.
2651A-901-01 Rev. A / March 2011