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12-54
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2600S-901-01 Rev. C / January 2008
Section 12: Instrument Control Library
Series 2600 System SourceMeter® Instruments Reference Manual
smuX.contact.calibratehi
X = SMU channel (a or b)
Function
Calibrate the high/sense high contact check measurement.
Usage
smuX.contact.calibratehi(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 0
Ω
for calibration point 1 and 50
Ω
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 non-volatile 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 non-volatile storage with the
smuX.cal.restore
function.
• This function will be disabled until a successful call to
smuX.cal.unloc
k is made.
Details
See
"Calibration".
Also see
Note: 2635/36 does not have contact check
smuX.contact.check
X = SMU channel (a or b)
Function
Determine if contact resistance is lower than threshold.
Usage
flag = smuX.contact.check()
-- check contact resistance against threshold
Remarks
Attempting to perform a contact check measurement when any of the following
conditions exists will generate an error:
• Output is off in High-Z mode.
• Current limit set to less than 1mA.
Details
See
for connections.
Also see
Example
Takes action if contact check on SMU A fails:
if (not smua.contact.check()) then
-- take action
end
Note: 2635/36 does not have contact check
smuX.contact.r
X = SMU channel (a or b)
Function
Measure contact resistance.
Usage
rhi, rlo = smuX.contact.r()
rhi
– the measured contact resistance on the high/sense high side
rlo
– the measured contact resistance on the low/sense low side.