Keithley 2461

In this section:
Circuit configurations ................................................................ 4-1
Operating boundaries ............................................................... 4-4
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
Grounding .............................................................................. 4-12
Floating the Model 2461 ......................................................... 4-13
Guarding ................................................................................ 4-15
Sink operation ........................................................................ 4-16
Battery charge and discharge ................................................ 4-16
Timing information .................................................................. 4-18
Calculating accuracy .............................................................. 4-18
Offset-compensated ohm calculations ................................... 4-21
Power calculations ................................................................. 4-21
High-capacitance operation.................................................... 4-22
Filtering measurement data.................................................... 4-23
Order of operations ................................................................ 4-25
Reset default values ............................................................... 4-25
Circuit configurations
You can measure current or voltage with either type of source.
The fundamental source-measure configurations for the Model 2461 are described in the following
section.
Source current
When you configure the instrument to source current, the instrument functions as a high-impedance
current source that can limit voltage and can measure current or voltage.
If you set the instrument to 2-wire sense, voltage is measured at the FORCE HI and FORCE LO
terminals of the instrument. If you set the instrument to 4-wire sense, voltage is measured directly at
the device under test using the sense terminals. Four-wire sense eliminates any voltage drops that
may be in the test leads or in the connections between the instrument and the device under test.
Section 4
Source-measure considerations