Keithley System SourceMeter 2601B, Справочное руководство

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Series 2600B System SourceMeter® Instrument Reference Manual Section 7: TSP command reference
2600BS-901-01 Rev. B / May 2013 7-191
Also see
Adjustment (on page B-18)
smuX.cal.lock() (on page 7-186)
smuX.cal.password (on page 7-187)
smuX.cal.state (on page 7-189)
smuX.contact.calibratehi()
This function calibrates the high/sense high 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
smu X .contact.calibratehi( cp1Measured , cp1Reference , cp2Measured , cp2Reference )
X Source-measure unit (SMU) channel (for example,
smua.contact.calibratehi()
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 will be near 0
Ω
and 50
Ω,
respectively.
All four measurements (
cp1Measured
,
cp1Reference
,
cp2Measured
, and
cp2Reference
) must be made
with the calibration set that is active. 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.
This function will be disabled until a successful call to
smu X .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 on SMU
channel A.
Install and measure
two resisters.
The user sends the contact
check LO calibration
command.
The user sends the contact
check HI calibration command.