Keithley 2461 Reference Manual

Model 2461
Interactive SourceMeter® Instrument Reference Manual Section 2:
General operation
2461-901-01 A/November 2015 2-107
The front-panel display will look similar to the following example.
Figure 67: Resistance measurement SVMI and reading ohms
Source current, measure voltage, and set measure units to ohms
If you want to make resistance readings by sourcing current and measuring voltage, you can use this
method.
The examples below use a 100 kΩ device under test. The code:
• Makes five readings by sourcing 5e-6 A
• Measures voltage with autorange enabled
• Sets the measure units to ohms
• Uses offset compensation
• Retrieves the source and measure values
Even though the measurement units are in ohms, the measurement range is 2 V.
Using SCPI:
Send the following code:
*RST
SENSe:FUNCtion "VOLT"
SENSe:VOLTage:RANGe:AUTO ON
SENSe:VOLTage:UNIT OHM
SENSe:VOLTage:OCOM ON
SOURce:FUNCtion CURR
SOURce:CURRent 5e-6
SOURce:CURRent:VLIM 10
SENSe:COUNT 5
OUTPut ON
TRACe:TRIGger "defbuffer1"
TRACe:DATA? 1, 5, "defbuffer1", SOUR, READ
OUTPut 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