Introduction
Introduction
The Keithley Instruments Model 2281S Precision DC Power 
Supply and Battery Simulator is a is a highly-sensitive, 
accurate, programmable power supply that sources stable 
low-noise voltage and monitors load currents over a wide 
dynamic range, from amperes to nanoamperes. It can also 
test batteries and generate battery models to simulate 
batteries.
The high-resolution 4.3-inch color display shows numerous 
parameters that describe the state of the instrument 
to enable you to get the most information from your 
measurements.
You can generate and edit battery models on the display. In 
addition, the capacity and voltage changes are shown on the 
display during the battery simulation. 
Complete documentation for the Series 2281S instrument is 
available for download at tek.com/product-support.
Model Number Description
2281S-20-6 Precision DC Power Supply and Battery 
Simulator, 20 V, 6 A