14: TSP command reference 2470 High Voltage SourceMeter Instrument
14-112 2470-901-01 Rev. A / May 2019
smu.measure.autorangelow
This attribute selects the lower limit for measurements of the selected function when the range is selected
automatically.
Type TSP-Link accessible Affected by Where saved Default value
Attribute (RW) Yes Restore configuration
Instrument reset
Power cycle
Measure configuration list
Configuration script
Measure configuration list
Current: 10 nA
Voltage: 0.2 V
Usage
lowRange = smu.measure.autorangerangelow
smu.measure.autorangerangelow = lowRange
 Current: 1e-8 to 100 mA
 Voltage: 200 mV to 200 V
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.
Though you can send any value when you send this command, the instrument selects the next
highest range value. For example, if you send 15 for the lowest voltage 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 4-37)
smu.measure.autorange (on page 14-110)
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