Keithley 2461 Reference Manual

Section
8: TSP command reference Model 2461 Interactive SourceMeter® Instrument
Reference Manual
8-132 2461-901-01 A/November 2015
Details
This command determines how the range is selected.
When this command is set to off, you must set the range. If you do not set the range, the instrument
remains at the range that was last selected by autorange.
When this command is set to on, the instrument automatically goes to the most sensitive range to
perform the measurement.
If a range is manually selected through the front panel or a remote command, this command is
automatically set to off.
Example
smu.measure.func = smu.FUNC_DC_CURRENT
smu.measure.autorange = smu.ON
Set the measurement function to current.
Set the range to be set automatically.
Also see
Ranges (on page 2-124)
smu.measure.range (on page 8-166)
smu.measure.autorangehigh
When autorange is selected, this attribute represents the highest measurement range that is used when the
instrument selects the measurement range automatically.
Type TSP-Link accessible Affected by Where saved Default value
Attribute (RW)
Yes
Restore configuration
Instrument reset
Power cycle
Measure configuration list
Function change
Configuration script
Measure configuration list
Resistance: 200 MΩ
Voltage: 7 V
Current: 100 mA
Usage
highRange = smu.measure.autorangehigh
smu.measure.autorangehigh = highRange
highRange
The highest resistance measurement range that is used when the range is set
automatically:
• Current: 1 µA to 7 A (10 A pulsed)
• Voltage: 0.2 V to 100 V
•
Resistance: 2
Ω
to 200 M
Ω
Details
This command can be written to and read for resistance measurements. For current and voltage
measurements, it can only be read.
For current and voltage measurements, the upper limit is controlled by the current or voltage limit.
For resistance measurements, you can use this command when automatic range selection is enabled
to put an upper bound on the range that is used for resistance measurements.
The upper limit must be more than the lower limit.
If the lower limit is equal to the upper limit, automatic range setting is effectively disabled.

Keithley 2461 Specifications

General

Maximum Current	7 A
Power	100 W
Resolution	6.5 digits
Source Measure Unit (SMU)	Yes
DC Voltage	100 V
Maximum Voltage	100 V
Display	5-inch capacitive touchscreen
Connectivity	USB, GPIB
Software	TSP
DC Current	7 A
Current Source Range	0 to 7 A
Voltage Measurement Range	100 mV to 100 V
Current Measurement Range	10 nA to 7 A
Voltage Measurement Resolution	100 nV