Keithley 2651A, Reference Manual

Page: 489 / 800

Model 2651A High Power System SourceMeter® Instrument Reference Manual Section 7: Command reference
2651A-901-01 Rev. A / March 2011 7-181
Usage
calState = smu X .cal.state
calState
The present calibration state. When reading this read-only attribute,
calState
will
have one of the following values:
0
or
smu X .CALSTATE_LOCKED
: Calibration is locked.
1
or
smu X .CALSTATE_CALIBRATING
: The calibration constants or dates have
been changed but not yet saved to nonvolatile memory.
2
or
smu X .CALSTATE_UNLOCKED
: Calibration is unlocked but none of the
calibration constants or dates have changed since the last save/restore.
X
SMU channel (for example,
smua.cal.state
applies to SMU Channel A).
Details
This read-only attribute indicates the calibration state of the instrument: locked, unlocked, or calibrating.
Example
calstate = smua.cal.state
print(calstate)
Reads calibration state for SMU Channel A.
Output:
0.00
The above output indicates that calibration is locked.
Also see
smuX.cal.lock() (on page 7-177)
smuX.cal.restore() (on page 7-179)
smuX.cal.save() (on page 7-180)
smuX.cal.unlock() (on page 7-181)
Adjustment (on page B-16)
smuX.cal.unlock()
This function enables the commands that change calibration settings.
Type TSP-Link accessible
Affected by Where saved Default value
Function Yes
Usage
smu X .cal.unlock( password )
X
Source-measure unit (SMU) channel (for example,
smua.cal.unlock()
applies
to SMU channel A)
password
Calibration password
Details
This function enables the calibration functions to change the calibration settings.
The password when the unit is shipped from the factory is "
KI0026XX
".