8: TSP command reference Model 2450 Interactive SourceMeter® Instrument
8-88 2450-901-01 Rev. B/September 2013
Example
smu.measure.func = smu.FUNC_DC_VOLTAGE
smu.measure.autorange = smu.ON
print(smu.measure.autorangehigh)
Sets the measurement function to voltage and turn
autorange on. Check the high range for voltage
measurements.
Also see
Ranges (on page 2-101)
reset() (on page 8-82)
smu.measure.autorange (on page 8-86)
smu.reset() (on page 8-126)
smu.measure.autorangelow
This attribute sets the lowest measurement range that is used when the instrument selects the measurement
range automatically.
Type TSP-Link accessible Affected by Where saved Default value
Instrument reset
Power cycle
Measure configuration list
Function change
Measure configuration list
Voltage: 20
Resistance: 20
Usage
lowRange = smu.measure.autorangerangelow
smu.measure.autorangerangelow = lowRange
The lower limit:
• Current: 1e-8 to 1 amps
• Voltage: 0.02 to 200 volts
•
Resistance: 2 to 2.0e8 ohms
Details
You can use this command when automatic range selection is enabled. It prevents the instrument from selecting
a range that is below this limit. Because the lowest ranges generally require longer settling times, setting the low
limit that is appropriate for your application but above the lowest possible range can make measurements require
less settling time.
The lower limit must be less than the upper limit.
While you can send any value when you send this command, the instrument select the next highest range value.
For example, if you send 15 for the lowest volt range, the instrument will be set to the 20 V range as the low limit.
If the lower limit is equal to the upper limit, automatic range setting is effectively disabled.
Example
smu.measure.func = smu.FUNC_DC_VOLTAGE
smu.measure.autorange = smu.ON
smu.measure.autorangelow = 2
Sets the low range for voltage measurements to 2 V.
Also see
Ranges (on page 2-101)
smu.measure.autorange (on page 8-86)
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