Tektronix KEITHLEY SourceMeter 2606B Reference Manual page 813

Section 17: Calibration
5. Allow the readings to settle, then get the 2606B readings:
r50_hi, r50_lo = smua.contact.r()
6. Send the contact check low calibration adjustment command:
smua.contact.calibratelo(r0_lo, Z_actual, r50_lo, 50_ohm_actual)
Where:
r0_lo
Z_actual
r50_lo
50_ohm_actual = Actual 50 Ω resistor value; the actual value of the resistor between the SENSE
Typical values:
smua.contact.calibratelo(r0_lo, 0, r50_lo, 50.15)
Where r0_lo is the same value as measured in step B, and r50_lo is the same value as
measured in step 5.
7. Send the contact check high calibration command:
smua.contact.calibratehi(r0_hi, Z_actual, r50_hi, 50_ohm_actual)
Where:
r0_hi
Z_actual
r50_hi
50_ohm_actual = Actual 50 Ω resistor value; the value of the resistor between the SENSE HI and
Typical values:
smua.contact.calibratehi(r0_hi, 0, r50_hi, 50.15)
Where r0_hi is the same value as measured in step B, and r50_hi is the same value as
measured in step 5.
17-28
Model 2606B System SourceMeter® Instrument Reference Manual
Figure 156: Connections for contact check 50 ohm calibration
= 2606B 0 Ω low measurement
= Actual zero value; the resistance of the short between the SENSE LO and LO
terminals
= 2606B 50 Ω low measurement
LO and LO terminals
= 2606B 0 Ω high measurement
= Actual zero value; the resistance of the short between the SENSE HI and HI
terminals
= 2606B 50 Ω high measurement
HI terminals
2606B-901-01 Rev. C November 2021