Keithley 2461 Reference Manual

Section
4: Source-measure considerations Model 2461 Interactive SourceMeter® Instrument
Reference Manual
4-10 2461-901-01 A/November 2015
Using SCPI commands:
To set the number of PLCs for current measurements, send the command:
:SENSe:CURRent:NPLCycles <n>
To set the number of PLCs for resistance measurements, send the command:
:SENSe:RESistance:NPLCycles <n>
To set NPLCs for voltage measurements, send the command:
:SENSe:VOLTage:NPLCycles <n>
Where <n> is a value from 0.01 to 10, with 0.01 resulting in the fastest reading rates and 10 resulting
in the lowest reading noise.
For example, to set NPLC for resistance measurements to 0.5, send the command
RES:NPLC 0.5
Using TSP commands:
To set NPLC, send the command smu.measure.nplc. For example, to set the NPLC value to 0.5
for voltage measurements, send the commands:
smu.measure.func = smu.FUNC_DC_VOLTAGE
smu.measure.nplc = 0.5
To assign a different measure function, replace smu.FUNC_DC_VOLTAGE with one of the following:
• For current measurements: smu.FUNC_DC_CURRENT
• For resistance measurements: smu.FUNC_RESISTANCE

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