Keithley 2651A, Справочное руководство, Страница: 483 / 800

Model 2651A High Power System SourceMeter® Instrument Reference Manual Section 7: Command reference
2651A-901-01 Rev. A / March 2011 7-175
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 = smu X .cal.date
smu X .cal.date = calDate
calDate
The active calibration set's calibration date.
X
Source-measure unit (SMU) channel (for example,
smua.cal.date
applies to
SMU channel A).
Details
This attribute stores the calibration date associated with the active calibration set. The calibration date can be
read at any time but can only be assigned a new value when calibration has been enabled with the
smu X .cal.unlock()
function.
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.
smu X .cal.date
must be set to the date the calibration 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,
smu X .cal.date
is accurate to within a few minutes of the value set.
Example
smua.cal.date = os.time()
Sets calibration date for SMU channel A to the current time
set on the instrument.
Also see
smuX.cal.adjustdate (on page 7-174)
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)
smuX.cal.due
This attribute stores the calibration due date for the next calibration.
Type TSP-Link accessible Affected by Where saved Default value
Attribute (RW) Yes SMU cal. restore SMU nonvolatile
memory 0