Keithley 2600a series User Manual

2600AS-901-01 Rev. B / September 2008 Return to Section Topics 19-109
Series 2600A System SourceMeter® Instruments Reference Manual Section 19: Remote Commands
smuX.contact.calibratelo
X = SMU channel (a or b)
Function Calibrate the low/sense low contact check measurement.
TSP-Link
accessibility
This function can be accessed from a remote TSP-Link node.
Usage smuX.contact.calibratelo(cp1measured, cp1reference, cp2measured,
cp2reference)
cp1measured The value measured by this SMU for calibration point 1.
cp1reference The reference measurement for calibration point 1 as
measured externally.
cp2measured The value measured by this SMU for calibration point 2.
cp2reference The reference measurement for calibration point 2 as
measured externally.
Remarks • Contact check measurement calibration does not require range information.
• Typically the two calibration points used will be near 0Ω for calibration point 1 and 50Ω for
calibration point 2.
• All four measurements (cp1measured, cp1reference, cp2measured, and cp2reference)
must be made with the active calibration set. Corruption of the
calibration constants may result if this is not heeded.
• The new calibration constants will be activated immediately but they will not be
written to nonvolatile storage. Use smuX.cal.save to commit the new constants to nonvolatile
storage. The active calibration constants will stay in effect until the
instrument is power cycled or a calibration set is loaded from nonvolatile storage with the
smuX.cal.restore function.
• This function will be disabled until a successful call to smuX.cal.unlock is made.
Details See Section 20.
Also see smuX.contact.calibratehi
smuX.contact.check
X = SMU channel (a or b)
Function Determine if contact resistance is lower than the threshold.
TSP-Link
accessibility
This function can be accessed from a remote TSP-Link node.
Usage flag = smuX.contact.check()
flag Indicates whether contact resistance is lower than the
threshold.
Remarks • This function returns true if the contact resistance is below the threshold, and false if it is
above the threshold.
• Attempting to perform a contact check measurement when any of the following
conditions exist will generate an error:
• Output is off in High-Z mode.
• Current limit set to less than 1mA.
Details See Section 2 for connections.
Also see smuX.contact.threshold, smuX.contact.speed
Example Takes action if contact check on SMU A fails:
if (not smua.contact.check()) then
-- take action
end

Keithley 2600a series Specifications

General

Brand	Keithley
Model	2600a series
Category	Measuring Instruments
Language	English