Keithley 2461 Reference Manual

Section
2: General operation Model 2461 Interactive SourceMeter® Instrument
Reference Manual
2-110 2461-901-01 A/November 2015
The front-panel display will look similar to the following example.
Figure 71: Resistance measurement with automatic settings
Offset-compensated ohms
The voltage offsets caused by the presence of thermoelectric EMFs (V
EMF
) can adversely affect
resistance measurement accuracy. To overcome these offset voltages, you can use offset-
compensated ohms.
See Offset-compensated ohm calculations (on page 4-21) for additional detail on calculating
offset-compensated ohms.
Setting offset-compensated ohms
Using the front panel:
This setting is only available from the front panel when the resistance measurement function is
selected.
1. Press the MENU key.
2. Under Measure, select Settings.
3. Next to Offset Compensation, select On.
4. Select HOME to return to the operating display.
Using SCPI commands:
To enable offset-compensated ohms, send the command:
SENSe:RESistance:OCOMpensated ON
Using TSP commands:
To enable offset-compensated ohms, send the commands:
smu.measure.func = smu.FUNC_RESISTANCE
smu.measure.offsetcompensation = smu.ON

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