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Appendix B: Calibration
Model 2657A High Power System SourceMeter® Instrument Reference Manual
B-20
2657A-901-01 Rev. B/December 2012
Calibration commands
Command Description
smua.source.calibratev(
range
,
cp1Expected
,
cp1Reference
,
cp2Expected
,
cp2Reference
)
Adjust voltage source range calibration*:
±
range
(source range to adjust).
cp1Expected
(source value programmed for cal. point 1).
cp1Reference
(reference measurement for cal. point 1).
cp2Expected
(source value programmed for cal. point 2).
cp2Reference
(reference measurement for cal. point 2)
smua.contact.calibratelo(
cp1Measured
,
cp1Reference
,
cp2Measured
,
cp2Reference
)
Adjust the low/sense low contact check measurement calibration.
cp1Measured
(value measured by SMU for cal. point 1).
cp1Reference
(reference measurement for cal. point 1).
cp2Measured
(value measured by SMU for cal. point 2).
cp2Reference
(reference measurement for cal. point 2).
smua.contact.calibratehi(
cp1Measured
,
cp1Reference
,
cp2Measured
,
cp2Reference
)
Adjust the high/sense high contact check measurement
calibration.
cp1Measured
(value measured by SMU for cal. point 1).
cp1Reference
(reference measurement for cal. point 1).
cp2Measured
(value measured by SMU for cal. point 2).
cp2Reference
(reference measurement for cal. point 2)
* Calibration point 1 should be performed at approximately 0% of range; calibration point 2 should be performed at
approximately 90% of range. See
(on page B-17) for calibration points.
Calibration adjustment procedure
Use the following procedure to perform remote calibration adjustment by sending commands over the
IEEE-488 bus, RS-232 port, or LAN. The remote commands and appropriate parameters are
separately summarized for each step.
Step 1. Prepare the Model 2657A for calibration adjustment
A. Connect the Model 2657A to the controller IEEE-488 interface, RS-232 port, or LAN using an
appropriate interface cable.
B. Turn on the Model 2657A and the test equipment, and allow them to warm up for at least two
hours before performing calibration adjustment.
C. Make sure the IEEE-488, RS-232, or LAN interface parameters are set up properly (to configure
the interface, press the
MENU
key, and then select
RS232
,
LAN
, or
GPIB,
as applicable.
Step 2. Voltage calibration adjustment
A. Connect the Model 2657A SMU to the digital multimeter using the 4-wire connections shown in
the figure below, and select the multimeter DC volts function. Use the direct connection scheme
for voltage ranges the digital multimeter used for calibration can measure. Use a voltage divider if
required to bring the voltage within the range capabilities of the digital multimeter.
Содержание 2657A
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