Keithley 2461 Reference Manual

Model 2461
Interactive SourceMeter® Instrument Reference Manual Section 2:
General operation
2461-901-01 A/November 2015 2-109
Measure resistance using the resistance function
When the measurement function is set to resistance, the Model 2461 measures resistances by
sourcing current. The instrument automatically sets the magnitude of the current source, voltage limit,
and the measure range.
This mode is the same as the Ohmmeter Quick Setup, which is available by pressing the QUICKSET
key.
The examples below use a 100 kΩ device under test. The code makes five readings. Note that the
measurement range is 200 kΩ.
Using SCPI:
Send the following code:
*RST
SENSe:FUNCtion "RES"
SENSe:RESistance:RANGe:AUTO ON
SENSe:RESistance:OCOMpensated ON
SENSe:COUNt 5
OUTPut ON
TRACe:TRIGger "defbuffer1"
TRACe:DATA? 1, 5, "defbuffer1", SOUR, READ
OUTPut OFF
The front-panel display will look similar to the following example.
Figure 70: Resistance measurement using resistance function
Using TSP:
Send the following code:
reset()
smu.measure.func = smu.FUNC_RESISTANCE
smu.measure.autorange = smu.ON
smu.measure.count = 5
smu.source.output = smu.ON
smu.measure.read(defbuffer1)
for i = 1, defbuffer1.n do
print(defbuffer1.relativetimestamps[i], defbuffer1[i])
end
smu.source.output = smu.OFF

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