Model 2657A High Power System SourceMeter® Instrument Reference Manual Section 7: TSP command reference
2657A-901-01 Rev. B/December 2012 7-179
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 SMU's nonvolatile memory.
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()
Sets the adjustment date for SMU channel A to the current
time set on the instrument.
Also see
Adjustment (on page B-14)
os.time()
(on page 7-147)
smuX.cal.date
(on page 7-179)
smuX.cal.due
(on page 7-180)
smuX.cal.lock()
(on page 7-181)
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.date
This attribute stores the calibration date of the active calibration set.
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
calDate = smuX.cal.date
smuX.cal.date = calDate
calDate
The calibration date of the active calibration set
X
Source-measure unit (SMU) channel (for example, smua.cal.date applies to
SMU channel A)
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