Keithley 2657A User Manual

Section 7: TSP command reference Model 2657A High Power System SourceMeter® Instrument Reference Manual
7-182 2657A-901-01 Rev. B/December 2012
Details
This function disables functions that can change calibration settings. Before you can lock calibration, the
calibration constants must be written to nonvolatile memory or a previous calibration set must be restored. Error
code 5012, "Cal data not saved - save or restore before lock," will result if this function is called when the
calibration state is smuX.CALSTATE_CALIBRATING.
Example
smua.cal.lock()
Disables calibration functions for SMU channel A.
Also see
Adjustment (on page B-14)
smuX.cal.restore()
(on page 7-184)
smuX.cal.save()
(on page 7-185)
smuX.cal.state
(on page 7-185)
smuX.cal.unlock()
(on page 7-186)
smuX.cal.ovp()
This function performs calibration of the overvoltage protection limit (OVP).
Type TSP-Link accessible
Affected by Where saved Default value
Function Yes
Usage
smuX.cal.ovp()
X
Source-measure unit (SMU) channel (for example, smua.cal.ovp() specifies
SMU channel A)
Details
This function automatically performs all the steps required to calibrate the overvoltage protection (OVP) limit
circuit. Since this function uses the readings obtained during calibration of the measure ranges, make sure
voltage calibration has been completed before calling this function.
Example
smua.cal.ovp()
Performs OVP calibration for SMU Channel A.
Also see
Adjustment (on page B-14)
smuX.measure.calibrateY()
(on page 7-196)
smuX.cal.password
This attribute stores the password required to enable calibration.
Type TSP-Link accessible Affected by Where saved Default value
Attribute (W) Yes Not applicable SMU nonvolatile
memory
"KI0026XX"

Keithley 2657A Specifications

General

Brand	Keithley
Model	2657A
Category	Measuring Instruments
Language	English