Interactive SourceMeter® Instrument Reference Manual Section 2:
2450-901-01 Rev. B/September 2013 2-107
Selecting low limits when automatic measurement range is used
You can set the low limit for the measurement range that is selected when the measurement range is
set automatically.
Choose the lower limits for the automatic measurement range using the front panel
Using the front panel:
1. Press FUNCTION and select the measurement function.
2. Press MENU.
3. Under Measure, select Settings. The MEASUREMENT SETTINGS page is displayed.
4. Select the button next to Auto Range Low Limit.
5. Select the low limit. The MEASUREMENT SETTINGS page is displayed again.
6. Press HOME to return to the Home page.
Using SCPI commands:
To set the lower limit for current measurements, send the command:
SENSe:CURRent:RANGe:AUTO:LLIMit <n>
Where <n> is the lowest current measurement range that can be used.
To set the lower limit for voltage measurements, send the command:
SENSe:VOLTage:RANGe:AUTO:LLIMit <n>
Where <n> is the lowest voltage measurement range that can be used.
To set the lower limit for resistance measurements, send the command:
SENSe:RESistance:RANGe:AUTO:LLIMit <n>
Where <n> is the lowest resistance measurement range that can be used.
Set the lower limits for the automatic measurement range using the TSP commands
Using TSP commands:
Send the commands:
smu.measure.func = smu.FUNC_DC_CURRENT
smu.measure.autorange = smu.ON
smu.measure.lowrange = lowRange
Where lowRange is the lowest current measurement range that can be used.
To set the lower limits for voltage, replace smu.FUNC_DC_CURRENT with smu.FUNC_DC_VOLTAGE.
To set the lower limits for resistance, replace smu.FUNC_DC_CURRENT with
smu.FUNC_RESISTANCE.
Determining upper limits when automatic measurement range is used
For resistance measurements, you can define the upper limit that can be selected when the
measurement range is set automatically. For voltage measurements, you can retrieve the value of the
upper limit.
These options are only available for voltage and resistance measurements.
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