Keithley 2657A, Reference Manual, Page: 502 / 805

Model 2657A High Power System SourceMeter® Instrument Reference Manual Section 7: TSP command reference
2657A-901-01 Rev. B/December 2012 7-189
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)
Performs contact
check on SMU
channel A.
Install and measure
two resisters.
The user sends
contact check LO
calibration
command.
The user sends
contact check HI
calibration
command.
Also see
Adjustment (on page B-14)
smuX.cal.restore() (on page 7-184)
smuX.cal.save() (on page 7-185)
smuX.cal.unlock() (on page 7-186)
smuX.contact.calibratehi() (on page 7-187)
smuX.contact.check()
This function determines if contact resistance is lower than the threshold.
Type TSP-Link accessible Affected by Where saved Default value
Function
Yes
Usage
smu
X
.contact.check()
X
Source-measure unit (SMU) channel (for example,
smua.contact.check()
applies to SMU channel A)