Smux.cal.adjustdate - Keithley 2651A Reference Manual

Section 7: 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
X
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 adjust date without first making a change to the calibration constants.
Once you change any calibration constants, you must set the adjustment date before being allowed to save the
calibration data to the SMU's nonvolatile memory.
This attribute is stored with the active calibration set. If a different calibration set is restored, this attribute will
reflect 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
smuX.cal.date
smuX.cal.due
smuX.cal.lock()
smuX.cal.restore()
smuX.cal.save()
smuX.cal.state
smuX.cal.unlock()
Adjustment (on page B-16)
7-174
Model 2651A High Power System SourceMeter® Instrument Reference Manual
Affected by
SMU cal. restore
Date of the last calibration adjustment.
Source-measure unit (SMU) channel (for example, smua.cal.adjustdate
applies to SMU channel A).
(on page 7-175)
(on page 7-175)
(on page 7-177)
(on page 7-179)
(on page 7-180)
(on page 7-180)
(on page 7-181)
Where saved Default value
SMU nonvolatile Initially set to factory calibration date
memory
Sets the adjustment date for SMU channel A to the current
time set on the instrument.
2651A-901-01 Rev. A / March 2011