Keithley 2461 Reference Manual

Section
8: TSP command reference Model 2461 Interactive SourceMeter® Instrument
Reference Manual
8-186 2461-901-01 A/November 2015
Example
smu.source.func = smu.FUNC_DC_VOLTAGE
smu.source.level = 1
Set the instrument to source
voltage and set it to source 1 V.
Also see
smu.source.func (on page 8-184)
smu.source.output (on page 8-188)
smu.source.protect.level (on page 8-188)
smu.source.offmode
This attribute defines the state of the source when the output is turned off.
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.OFFMODE_NORMAL
Usage
sourceOffMode = smu.source.offmode
smu.source.offmode = sourceOffMode
sourceOffMode
The output-off setting; set to one of the following values (see the Details below for
specifics regarding each option):
• smu.OFFMODE_NORMAL
• smu.OFFMODE_ZERO
• smu.OFFMODE_HIGHZ
•
smu.OFFMODE_GUARD
Details
When the Model 2461 is set to the normal output-off state, the following settings are made when the
source is turned off:
• The measurement sense is set to 2-wire
• The voltage source is selected and set to 0 V
• The current limit is set to 10 % of the full scale of the present measurement function autorange
value
• If source readback is off, Output Off is displayed in the Home screen Source area
• If source readback is on, the actual measurement is displayed in the Home screen Source area
• If measurement is set to resistance, dashes (--.----) are shown in the Home screen Source area
• The Source button on the Home screen shows the value that will be sourced when the output is
turned on again
When the high-impedance output-off state is selected and the output is turned off:
• The measurement sense is set to 2-wire
• The output relay opens, disconnecting the instrument as a load

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