Keithley SourceMeter 2600 Series Reference Manual page 335

Series 2600 System SourceMeters Reference Manual
smuX.cal.due
Attribute Calibration due date for the next calibration.
Usage
caldue = smuX.cal.due
smuX.cal.due = caldue
Set
caldue
os.time({year=yr, month=mo, day=da})
where:
• This attribute stores the calibration due date associated with the active calibration
Remarks
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
• 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.
• Hour and minute can also be included in
os.time({year=yr, month=mo, day=da, hour=hr, minute=mn})
Seconds can be included, but will essentially be ignored due to the precision of the
internal date storage format.
• The date is stored as the number of seconds since UTC 12:00 am Jan 1, 1970.
Details See Section 16
Also see smuX.cal.date, smuX.cal.restore, smuX.cal.state,
Sets calibration due date for SMU A (July 1, 2006):
Example
smua.cal.due = os.time({year=2005, month=7, day=1})
smuX.cal.lock
Function Disables commands that change calibration settings.
Usage
smuX.cal.lock()
Remarks This function will disable the calibration functions that can change the calibration
settings. It is an error to call this function while the calibration state is
smuX.CALSTATE_CALIBRATING
volatile memory, or a previous calibration set must be restored prior to locking
calibration.
Details See Section 16
Also see smuX.cal.restore, smuX.cal.save, smuX.cal.state,
Example Disable calibration functions for SMU A:
smua.cal.lock()
X = SMU channel (a or b)
to the following value:
to
yr 2005 2037
to
mo 1 12
to
da 1 31
(calibration).
X = SMU channel (a or b)
. The calibration constants must be written to non-
(calibration).
Return to Section 12 topics
Instrument Control Library 12-61
-- Reads calibration due date.
-- Writes calibration due date.
smuX.cal.unlock
as follows:
caldate
smuX.makebuffer
smuX.makebuffer
2600S-901-01 Rev. A / May 2006
function.