Keithley 2600B User Manual

Section
7: TSP command reference Series 2600B System SourceMeter® Instrument
Reference Manual
7-208 2600BS-901-01 Rev. C / August 2016
smuX.contact.calibratelo()
This function calibrates the low/sense low contact check measurement. This function is not available on the
Models 2604B/2614B/2634B.
Type TSP-Link accessible
Affected by Where saved Default value
Function
Yes
Usage
smuX.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 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)
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.

Keithley 2600B Specifications

General

Brand	Keithley
Model	2600B
Category	Measuring Instruments
Language	English