Tektronix Keithley 2651A Reference Manual page 571

Section 7: TSP command reference
smuX.cal.adjustdate
This attribute stores the date of the last calibration adjustment.
Type TSP-Link accessible
Attribute (RW) Yes
Usage
adjustDate = smuX.cal.adjustdate
smuX.cal.adjustdate = adjustDate
adjustDate
Details
This attribute stores the adjustment date associated with the active calibration set. The adjustment
date can be read at any time but can only be assigned a new value when calibration has been
enabled with the smuX.cal.unlock() function.
You cannot change the adjustment date without first making a change to the calibration constants.
Once you change any calibration constants, you must set the adjustment date before you can save
the calibration data to the nonvolatile memory of the SMU.
This attribute is stored with the active calibration set. If a different calibration set is restored, this
attribute reflects the date stored with that set.
smuX.cal.adjustdate must be set to the date the adjustment was done using the UTC time and
date. The date is stored as the number of seconds since UTC, 12:00 am Jan 1, 1970.
Due to the internal storage format, smuX.cal.adjustdate is only accurate to within a few minutes
of the value set.
Example
smua.cal.adjustdate = os.time()
Also see
Adjustment (on page 12-15)
os.time() (on page 7-189)
smuX.cal.date
smuX.cal.due
smuX.cal.lock()
smuX.cal.restore()
smuX.cal.save()
smuX.cal.state
smuX.cal.unlock()
7-226
Model 2651A High Power System SourceMeter® Instrument Reference Manual
Affected by
SMU cal. restore
Date of the last adjustment
(on page 7-227)
(on page 7-228)
(on page 7-230)
(on page 7-233)
(on page 7-234)
(on page 7-235)
(on page 7-236)
Where saved
SMU nonvolatile memory
Sets the adjustment date to the current time set on
the instrument.
Default value
Initially set to factory
calibration date
2651A-901-01 Rev. C October 2021