Section 7: Command reference Model 2651A High Power System SourceMeter® Instrument Reference Manual
7-174 2651A-901-01 Rev. A / March 2011
smuX.cal.adjustdate
This attribute stores the date of the last calibration adjustment.
Type TSP-Link accessible Affected by Where saved Default value
Attribute (RW) Yes SMU cal. restore SMU nonvolatile
memory
Initially set to factory calibration date
Usage
adjustDate = smuX.cal.adjustdate
smuX.cal.adjustdate = adjustDate
adjustDate
Date of the last calibration adjustment.
X
Source-measure unit (SMU) channel (for example, smua.cal.adjustdate
applies to SMU channel A).
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()
Sets the adjustment date for SMU channel A to the current
time set on the instrument.
Also see
smuX.cal.date (on page 7-175)
smuX.cal.due
(on page 7-175)
smuX.cal.lock()
(on page 7-177)
smuX.cal.restore()
(on page 7-179)
smuX.cal.save()
(on page 7-180)
smuX.cal.state
(on page 7-180)
smuX.cal.unlock()
(on page 7-181)
Adjustment
(on page B-16)
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