Model 2657A High Power System SourceMeter® Instrument Reference Manual
Section 2: General operation
2657A-901-01 Rev. B/December 2012
2-25
Step 3: Select the measurement function and range
Select measurement function and range as follows:
1. Select the measurement function by pressing the
MEAS
key.
2. Set the measurement range with the
RANGE
keys, or enable
AUTO
range. When setting the
range, consider the following points:
•
When measuring the source (such as when sourcing V and measuring V), you cannot select the
measurement range using the RANGE keys. The selected source range determines the measurement
range.
•
When not measuring the source (such as when sourcing V but measuring I), measurement range
selection can be done manually or automatically. When using manual ranging, use the lowest possible
range for best accuracy. When autorange is enabled, the Model 2657A automatically goes to the most
sensitive range to make the measurement.
Step 4: Turn the output on
Turn the output on by pressing the
OUTPUT ON/OFF
control. The OUTPUT indicator light switches
on.
Step 5: Observe readings on the display.
Press the
TRIG
key if necessary to trigger the instrument to begin taking readings. The readings are
on the top line, and source and limit values are on the bottom line.
Step 6: Turn the output off
When finished, turn the output off by pressing the
OUTPUT ON/OFF
control. The OUTPUT indicator
light switches off.
Remote source-measure commands
Basic source-measurement procedures can also be performed through a remote interface. To do this,
send the appropriate commands. The following table summarizes basic source-measure commands.
See
(on page 5-1) for more information on using these commands.
Basic source-measure commands
Command Description
smua.measure.autorangei = smua.AUTORANGE_ON
Enable current measure autorange.
smua.measure.autorangev = smua.AUTORANGE_ON
Enable voltage measure autorange.
smua.measure.autorangei = smua.AUTORANGE_OFF
Disable current measure autorange.
smua.measure.autorangev = smua.AUTORANGE_OFF
Disable voltage measure autorange.
smua.measure.rangei = rangeval
Set current measure range.
smua.measure.rangev = rangeval
Set voltage measure range.
reading = smua.measure.i()
Request a current reading.
reading = smua.measure.v()
Request a voltage reading.
iReading, vReading = smua.measure.iv()
Request a current and voltage reading.
reading = smua.measure.r()
Request a resistance reading.
reading = smua.measure.p()
Request a power reading.
Summary of Contents for 2657A
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