Keithley 2606B System SourceMeter, Reference Manual

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Section 7: TSP command reference 2606B System SourceMeter® Instrument Reference Manual
7-186 2606B-901-01 Rev. B / May 2018
Example
-- Short SENSE LO and LO terminals
-- Short SENSE HI and HI terminals
-- Allow readings to settle, then get measurements
r0_hi, r0_lo = smua.contact.r()
-- Connect 50 OHM resistor between SENSE LO and LO
-- Connect 50 OHM resistor between SENSE HI and HI
-- Allow readings to settle, then get measurements
r50_hi, r50_lo = smua.contact.r()
smua.contact.calibratelo(r0_lo, Z_actual_lo, r50_lo, 50_ohm_actual_lo)
smua.contact.calibratehi(r0_hi, Z_actual_hi, r50_hi, 50_ohm_actual_hi)
The instrument performs a contact check on SMU channel A.
Install and measure two resistors.
The user sends the contact check LO calibration command.
The user sends the contact check HI calibration command.
Also see
Adjustment (on page B-10)
smuX.cal.restore() (on page 7-182)
smuX.cal.save() (on page 7-183)
smuX.cal.unlock() (on page 7-184)
smuX.contact.calibratelo() (on page 7-186)
smuX.contact.calibratelo()
This function calibrates the low/sense low contact check measurement.
Type TSP-Link accessible Affected by Where saved Default value
Function Yes
Usage
smu X .contact.calibratelo( cp1Measured , cp1Reference , cp2Measured , cp2Reference )
X
Source-measure unit (SMU) channel (for example,
smua.contact.calibratelo()
applies to SMU channel A)
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
Details
Contact check measurement calibration does not require range information.
Typically, calibration points one and two are near 0 Ω and 50 Ω ,
respectively.
All four measurements (
cp1Measured
,
cp1Reference
,
cp2Measured
, and
cp2Reference
) must
be made with the active calibration set. If not, corruption of the calibration constants may result.
The new calibration constants are activated immediately but are not written to nonvolatile memory.
Use
smu X .cal.save()
to save the new constants to nonvolatile memory. The active calibration
constants stay in effect until the instrument is power cycled or a calibration set is loaded from
nonvolatile memory with the
smu X .cal.restore()
function.