Keithley 2461 Reference Manual

Table of Contents
Model 2461 Interactive SourceMeter® Instrument Reference
Manual
Model 2461 web interface ....................................................................................................... 2-73
How to install the Keithley I/O Layer ....................................................................................... 2-79
Modifying, repairing, or removing Keithley I/O Layer software ................................................ 2-80
Determining the command set you will use ....................................................................... 2-80
System information ............................................................................................................ 2-81
Instrument sounds .............................................................................................................. 2-83
Test connections ................................................................................................................ 2-84
Basic connections ................................................................................................................... 2-84
Using the interlock ................................................................................................................... 2-86
Front- or rear-panel test connections ...................................................................................... 2-88
Two-wire compared to four-wire measurements ..................................................................... 2-89
Test fixtures ............................................................................................................................. 2-95
Output-off state .................................................................................................................. 2-97
Normal output-off state ............................................................................................................ 2-97
High-impedance output-off state ............................................................................................. 2-98
Zero output-off state ................................................................................................................ 2-98
Guard output-off state ............................................................................................................. 2-98
Output-off states and inductive loads ...................................................................................... 2-98
Setting the output-off state ...................................................................................................... 2-99
Source-measure overview ................................................................................................. 2-99
Source and measure order.................................................................................................... 2-100
Source and measure through the front panel ........................................................................ 2-100
Source and measure using SCPI commands........................................................................ 2-111
Source and measure using TSP commands ......................................................................... 2-111
Digitize functions .............................................................................................................. 2-113
Digitize measurements .......................................................................................................... 2-113
Digitizing aperture and sample rate ....................................................................................... 2-115
Contact check .................................................................................................................. 2-115
Contact check measurements ............................................................................................... 2-116
Contact check measurement connections ............................................................................ 2-117
Enabling or disabling contact check ...................................................................................... 2-117
Contact check threshold resistance ...................................................................................... 2-118
Running contact check .......................................................................................................... 2-119
Contact check commands ..................................................................................................... 2-120
Contact check programming example ................................................................................... 2-120
Protection ......................................................................................................................... 2-121
Overvoltage protection .......................................................................................................... 2-121
Source limits .......................................................................................................................... 2-122
Ranges ............................................................................................................................. 2-124
Source range ......................................................................................................................... 2-124
Measurement range .............................................................................................................. 2-126
Automatic reference measurements ................................................................................ 2-129
Setting autozero .................................................................................................................... 2-129
Source readback .............................................................................................................. 2-130
Setting source readback ....................................................................................................... 2-130
Source delay .................................................................................................................... 2-130
Setting the source delay ........................................................................................................ 2-131
Graphing .......................................................................................................................... 2-131
Setting up the Graph tab ....................................................................................................... 2-132
Using the Graph tab .............................................................................................................. 2-134
Binning data with the Histogram ...................................................................................... 2-135

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