Keithley 2635 Reference Manual

2600S-901-01 Rev. C / January 2008 Return to Section Topics 12-49
Series 2600 System SourceMeter® Instruments Reference Manual Section 12: Instrument Control Library
Usage
Adjustdate = smuX.cal.adjustdate -- Read the adjustment date.
smuX.cal.adjustdate = adjustdate -- Write the adjustment date.
Set adjustdate to the following value:
os.time({year=yr, month=mo, day=da})
where: yr 2005 to 2037
mo 1 to 12
da 1 to 31
Remarks • 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 with first making a change to the calibration
constants.
• Once you change any calibration constants, you must set the adjust date before being
allowed to save the calibration data to NV 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.
• Hour and minute can also be included in adjustdate as follows:
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 (calibration)
Also see smuX.cal.lock, smuX.cal.unlock, smuX.cal.save, smuX.cal.restore
Example smuX.cal.adjustdate = os.time({year = 2006, month=7, day=1})
smuX.cal.date
X = SMU channel (a or b)
Attribute Calibration date for the active calibration set.
Usage caldate = smuX.cal.date -- Reads calibration date.
smuX.cal.date = caldate -- Writes calibration date.
Set caldate to the following value:
os.time({year=yr, month=mo, day=da})
where: yr 2005 to 2037
mo 1 to 12
da 1 to 31
Remarks • 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
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 date stored with that set.
• Hour and minute can also be included in caldate as follows:
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 "Calibration".
Also see smuX.cal.adjustdate, smuX.cal.due, smuX.cal.restore, smuX.cal.save
Example Sets calibration date for SMU A (July 1, 2005):
smua.cal.date = os.time({year=2005, month=7, day=1})
smuX.cal.due
X = SMU channel (a or b)
Attribute Calibration due date for the next calibration.

Keithley 2635 Specifications

General

Brand	Keithley
Model	2635
Category	Measuring Instruments
Language	English