Keithley SourceMeter 2600 Series Reference Manual page 336

12-62 Instrument Control Library
smuX.cal.password
Attribute Password to enable calibration.
Usage
smuX.cal.password = newpassword
newpassword
• A new password can only be assigned when calibration has been unlocked.
Remarks
• The calibration password is write-only and cannot be read.
Details See Section 16
Also see smuX.makebuffer
Assign a new calibration password for SMU A:
Example
smua.cal.password = "LetMeIn"
smuX.cal.polarity
Attribute Control which calibration constants are used for all subsequent measurements.
Usage
calpolarity = smuX.cal.polarity
smuX.cal.polarity = calpolarity
Set
or
0
or
1
or
2
• This attribute controls which polarity calibration constants are used to make all
Remarks
subsequent measurements. This attribute does not affect the
smuX.measure.calibrateY
polarity for those commands are dictated by the range parameter given to the
command.
• The measurement calibration commands require the measurements provided to
have been made using the polarity being calibrated. When the calibration points are
sufficiently far away from zero the desired polarity constants are inherently used
when making those measurements. When measuring near zero, it is possible for the
measurement to be made using the calibration constants from either polarity without
knowing which was used. Setting this attribute to positive or negative forces
measurements to be made using the calibration constants for a given polarity rather
than basing the choice on the raw measurement data.
• This attribute can only be set to positive or negative when calibration is unlocked.
This attribute will automatically be set back to CAL_AUTO when calibration is
locked.
Details See Section 16
Also see smuX.makebuffer, smuX.measure.calibrateY,
2600S-901-01 Rev. A / May 2006
The new password (string).
(calibration).
to one of the following values:
calpolarity
smuX.CAL_AUTO
smuX.CAL_POSITIVE
smuX.CAL_NEGATIVE
(calibration).
Return to
Series 2600 System SourceMeters Reference Manual
X = SMU channel (a or b)
X = SMU channel (a or b)
-- Reads cal polarity.
-- Writes cal polarity.
Automatic polarity detection.
Measure with positive polarity calibration constants.
Measure with negative polarity calibration constants.
or the
smuX.source.calibrateY
smuX.source.calibrateY
Section 12 topics
function. The