Tektronix KEITHLEY SourceMeter 2606B Reference Manual page 579

Section 15: TSP command reference
smuX.contact.calibratelo()
This function adjusts the low/sense low contact check measurement.
Type TSP-Link accessible
Function Yes
Usage
smuX.contact.calibratelo(cp1Measured, cp1Reference, cp2Measured, cp2Reference)
X
cp1Measured
cp1Reference
cp2Measured
cp2Reference
Details
Contact check measurement adjustment does not require range information.
Typically, 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 smuX.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 smuX.cal.restore() function.
This function is disabled until a successful call to smuX.cal.unlock() is made.
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.
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 17-12)
smuX.cal.restore()
smuX.cal.save()
smuX.cal.unlock()
smuX.contact.calibratehi()
15-206
Affected by
Source-measure unit (SMU) channel (for example,
smua.contact.calibratelo() applies to SMU channel A)
The value measured by this SMU for point 1
The reference measurement for point 1 as measured externally
The value measured by this SMU for point 2
The reference measurement for point 2 as measured externally
(on page 15-201)
(on page 15-202)
(on page 15-204)
(on page 15-204)
Model 2606B System SourceMeter® Instrument Reference Manual
Where saved
2606B-901-01 Rev. C November 2021
Default value