Buffer Programming Examples - Keithley 2601 Reference Manual

Series 2600 System SourceMeter® Instruments Reference Manual

Buffer programming examples

Defined buffer example
The listing below shows a programming example for storing data using the pre-defined Buffer 1 for
Channel A. The SourceMeter loops for voltages from 0.01V to 1V with 0.01V steps (essentially
performing a staircase sweep), stores 100 current readings and source values in Buffer 1, and
then recalls all 100 readings and source values.
smua.reset()
display.screen = 0
display.smua.measure.func =
display.MEASURE_DCAMPS
smua.measure.autorangei = smua.AUTORANGE_ON
format.data = format.ASCII
smua.nvbuffer1.clear()
smua.nvbuffer1.appendmode = 1
smua.nvbuffer1.collectsourcevalues = 1
smua.measure.count = 1
smua.source.func = smua.OUTPUT_DCVOLTS
smua.source.levelv = 0.0
smua.source.output =smua.OUTPUT_ON
for v = 0.01, 1.0, 0.01 do
end
smua.source.output =smua.OUTPUT_OFF
printbuffer(1, 100, smua.nvbuffer1.readings)
printbuffer(1, 100,
smua.nvbuffer1.sourcevalues)
2600S-901-01 Rev. C / January 2008
smua.source.levelv = v
smua.measure.i(smua.nvbuffer1)
waitcomplete()
Return to Section Topics
Section 7: Buffer (Data Store)
- Restore Series 2600 defaults.
-
- Select Channel A display.
-
- Display current.
-
- Select measure I auto range.
-
- Select ASCII data format.
-
- Clear Buffer 1.
-
- Enable append buffer mode.
-
- Enable source value storage.
-
- Set count to 1.
-
- Select source voltage function.
-
- Set bias voltage to 0V.
-
- Turn on output.
-
- Loop for voltages from 0.01 to 1V.
-
- Set source voltage.
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- Measure current, store in buffer.
-
- Wait for reading to complete.
-
- End loop.
-
- Turn off output.
-
- Return readings 1-100.
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- Return source values 1-100.
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