Tektronix Keithley 2651A Reference Manual page 67

Section 2: General operation
Contact check programming example
The following programming example illustrates the setup and command sequence for a typical
contact check measurement. These commands set the contact check speed to fast and the threshold
to 100 Ω. Then, a contact check measurement against the threshold is made. If it fails, a more
accurate contact check measurement is made, and the test is aborted. Otherwise, the output is
turned on, and the test continues.
-- Restore defaults.
smua.reset()
-- Set contact check speed to fast.
smua.contact.speed = smua.CONTACT_FAST
-- Set the contact check threshold to 100 ohms.
smua.contact.threshold = 100
-- Check contacts against threshold.
if not smua.contact.check() then
-- Set speed to slow.
smua.contact.speed = smua.CONTACT_SLOW
-- Get aggregate resistance readings.
rhi, rlo = smua.contact.r()
-- Return contact resistances to the host.
print(rhi, rlo)
-- Terminate execution.
exit()
end
-- Turn output on and continue.
smua.source.output = smua.OUTPUT_ON
Saved setups
You can restore the Model 2651A to one of six nonvolatile-memory setup configurations (five user
setups and one factory default), or to a setup stored on an external USB flash drive. As shipped from
the factory, the Model 2651A powers up with the factory default settings, which cannot be overwritten.
The default settings are also in the five user setup locations, but may be overwritten. The factory
default settings are listed in the command descriptions in the
You can also change the setup configuration that is used when the instrument powers up.
Saving user setups
You can save the present Model 2651A setup to internal nonvolatile memory or a USB flash drive.
To save a user setup to nonvolatile memory from the front panel:
1. Configure the Model 2651A to the settings that you want to save.
2. Press the MENU key.
3. Select SETUP and then press the ENTER key.
4. Select the SAVE menu item and then press the ENTER key.
5. Select INTERNAL and then press the ENTER key.
6. Select the user number (1 through 5) and press the ENTER key.
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Model 2651A High Power System SourceMeter® Instrument Reference Manual
TSP command reference
2651A-901-01 Rev. C October 2021
(on page 7-1).