Keithley 2461 Reference Manual

Model 2461
Interactive SourceMeter® Instrument Reference Manual Table
of Contents
TSP-Net ........................................................................................................................... 3-162
Using TSP-Net with any ethernet-enabled instrument .......................................................... 3-163
Remote instrument events .................................................................................................... 3-164
TSP-Net instrument commands: General device control ...................................................... 3-164
TSP-Net instrument commands: TSP-enabled device control .............................................. 3-164
Example: Using tspnet commands ........................................................................................ 3-165
Source-measure considerations .............................................................................. 4-1
Circuit configurations ............................................................................................................ 4-1
Source current ........................................................................................................................... 4-1
Source voltage .......................................................................................................................... 4-3
Operating boundaries........................................................................................................... 4-4
Current source operating boundaries ........................................................................................ 4-5
Voltage limit boundary examples .............................................................................................. 4-6
Current limit boundary examples ............................................................................................... 4-7
Output transient recovery ..................................................................................................... 4-8
Load regulation .................................................................................................................... 4-8
Using NPLCs to adjust speed and accuracy ....................................................................... 4-9
Noise shield ........................................................................................................................ 4-11
Safety shield ....................................................................................................................... 4-11
Safety shielding ....................................................................................................................... 4-12
Grounding .......................................................................................................................... 4-12
Noise and chassis ground ....................................................................................................... 4-12
Floating the Model 2461..................................................................................................... 4-13
Guarding ............................................................................................................................ 4-15
Using guard with a test fixture ................................................................................................. 4-15
Sink operation .................................................................................................................... 4-16
Battery charge and discharge ............................................................................................ 4-16
Timing information .............................................................................................................. 4-18
Measurement settling time considerations .............................................................................. 4-18
Overtemperature protection .................................................................................................... 4-18
Calculating accuracy .......................................................................................................... 4-18
Calculating source or measure accuracy ................................................................................ 4-19
Calculate accuracy of a resistance measurement made by sourcing I and measuring V ........ 4-19
Offset-compensated ohm calculations ............................................................................... 4-21
Power calculations ............................................................................................................. 4-21
High-capacitance operation ............................................................................................... 4-22
Enabling the high capacitance feature .................................................................................... 4-22
Filtering measurement data ............................................................................................... 4-23
Repeating average filter .......................................................................................................... 4-23
Moving average filter ............................................................................................................... 4-24
Setting up the averaging filter.................................................................................................. 4-24
Order of operations ............................................................................................................ 4-25
Reset default values ........................................................................................................... 4-25
Default values ......................................................................................................................... 4-26

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