Keithley 2450 User Manual

Model 2450
Interactive SourceMeter® Instrument Reference Manual Section 8:
TSP command reference
2450-901-01 Rev. B/September 2013 8-127
smu.source.autorange
This attribute determines if the range is selected manually or automatically for the selected source function or
voltage source.
Type TSP-Link accessible Affected by Where saved Default value
Attribute (RW)
Yes
Restore configuration
Instrument reset
Power cycle
Source configuration list
Function change
Configuration script
Source configuration list
smu.ON
Usage
sourceAutorange = smu.source.autorange
smu.source.autorange = sourceAutorange
sourceAutorange
Disable automatic source range: smu.OFF or 0
Enables automatic source range:
smu.ON
or
1
Details
This command indicates the state of the range for the selected source. When automatic source range is
disabled, the source range is set manually.
When automatic source range is enabled, the instrument selects the range that is most appropriate for the value
that is being sourced. The output level controls the range. If you read the range after the output level is set, the
instrument returns the range that the instrument chose as appropriate for that source level.
If the source range is set to a specific value from the front panel or a remote command, the setting for automatic
range is set to disabled.
Only available for current and voltage functions.
Example
smu.source.func = smu.FUNC_DC_CURRENT
smu.source.autorange = smu.ON
Set the source function to current.
Set the instrument to select the
source range automatically.
Also see
smu.source.range (on page 8-143)

Keithley 2450 Specifications

General

Model	2450
Category	SourceMeter
Voltage Source Range	±200 V
Current Source Range	±1 A
DC Voltage	200 V
DC Current	1 A
Power Output	20 W
Resolution	6.5 digits
Display	5-inch capacitive touchscreen
Operating Temperature	0°C to 50°C
Connectivity	USB, LAN, GPIB
Dimensions	213 mm × 88 mm × 370 mm