Section 7: Command reference Model 2651A High Power System SourceMeter® Instrument Reference Manual
7-176 2651A-901-01 Rev. A / March 2011
Usage
calDue = smuX.cal.due
smuX.cal.due = calDue
calDue
Due date of next calibration.
X
Source-measure unit (SMU) channel (for example, smua.cal.due applies to
SMU channel A).
Details
This attribute stores the calibration due date associated with the active calibration set. The calibration due 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.
This attribute is stored with the active calibration set. If a different calibration set is restored, this attribute will
reflect the due date stored with that set.
smuX.cal.due must be set to the date the next calibration is required 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.due is only accurate to within a few minutes of the value set.
Example
smua.cal.due = os.time() + 365 * 24 * 60 * 60
Sets the SMU channel A calibration due date
equal to one year from the current time set on
the instrument.
Also see
smuX.cal.adjustdate (on page 7-174)
smuX.cal.date (on page 7-175)
smuX.cal.lock()
(on page 7-177)
smuX.cal.restore() (on page 7-179)
smuX.cal.state
(on page 7-180)
smuX.cal.unlock()
(on page 7-181)
Adjustment
(on page B-16)
smuX.cal.fastadc()
This function performs calibration of the fast analog-to-digital converter (fast ADC).
Type TSP-Link accessible
Affected by Where saved Default value
Function Yes
Usage
smuX.cal.fastadc()
X
Source-measure unit (SMU) channel (for example, smua.cal.fastadc()
specifies SMU channel A).
Details
This function automatically performs all the steps required to calibrate the fast ADC. This function uses the
readings obtained when calibrating the measure ranges (make sure both voltage and current calibration has
been completed before calling this function).
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