Keithley 2461 Reference Manual

Model 2461
Interactive SourceMeter® Instrument Reference Manual Section 8: TSP command referenc
e
2461-901-01 A/November 2015 8-151
Details
Set this command to the type of measurement you want to make.
Reading this command returns the measure function that is presently active.
When you select a function, settings for other commands that are related to the function become
active. For example, assume that:
• You selected the current function and set the math function to reciprocal.
• You changed to the voltage function and set the math function to percent.
If you return to the current function, the math function returns to reciprocal. If you then switch from the
current function to the voltage function, the math function returns to percent. All attributes that begin
with smu.measure. are saved with the active measure function unless otherwise indicated in the
command description.
If a digitize measurement function is selected, this returns smu.FUNC_NONE. The smu.FUNC_NONE
setting is made automatically if you select a function using the smu.digitize.func command or
through the options from the front-panel Digitize functions tab.
Example
smu.measure.func = smu.FUNC_DC_VOLTAGE
smu.measure.math.format = smu.MATH_PERCENT
smu.measure.math.enable = smu.ON
smu.measure.func = smu.FUNC_RESISTANCE
smu.measure.math.format = smu.MATH_RECIPROCAL
smu.measure.math.enable = smu.ON
print(smu.measure.math.format)
smu.measure.func = smu.FUNC_DC_VOLTAGE
print(smu.measure.math.format)
Sets the instrument to measure voltage
and set the math format to percent and
enable the math functions.
Set the instrument to measure resistance
and set the math format to reciprocal and
enable the math functions.
Print the math format while the
resistance measurement function is
selected. The output is:
smu.MATH_RECIPROCAL
Change the function to voltage. Print the
math format. The output is:
smu.MATH_PERCENT
Also see
Making resistance measurements (on page 2-105)
smu.digitize.func (on page 8-108)
Source and measure using TSP commands (on page 2-111)

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