Section 1 
Introduction 
In this section: 
Welcome .................................................................................. 1-1 
Extended warranty ................................................................... 1-1 
Introduction to this manual ....................................................... 1-1 
CD-ROM contents.................................................................... 1-2 
Organization of manual sections .............................................. 1-2 
Model 2651A applications ........................................................ 1-2 
 
 
Welcome 
Thank you for choosing a Keithley Instruments product. The Model 2651A High Power System 
SourceMeter
®
 Instrument provides manufacturers of electronic components and semiconductor 
devices a high-power source-measure unit (SMU). A SMU is an instrument that combines source and 
measurement capabilities in a single instrument. This combination simplifies test processes by 
eliminating synchronization and connection issues associated with multiple instrument solutions. A 
Model 2651A provides a scalable, high throughput, highly cost-effective solution for precision DC, 
pulse, and low frequency AC source-measure testing that also maintains code compatibility with the 
Series 2600A. 
 
Extended warranty 
Additional years of warranty coverage are available on many products. These valuable contracts 
protect you from unbudgeted service expenses and provide additional years of protection at a fraction 
of the price of a repair. Extended warranties are available on new and existing products. Contact your 
local Keithley Instruments representative for details. 
 
Introduction to this manual 
This manual provides detailed tutorials to help you achieve success with your Keithley Instruments 
Model 2651A. In addition, the basics of the two simplest interfaces, the front panel and the web 
interface, are provided to familiarize you with the instrument. Select and run all examples in Sections 
5, 6, and 7 that are relevant to your intended use and to the equipment you are using. 
Some of the examples in this manual may use unfamiliar commands and concepts. For detailed 
information about these, refer to the Reference Manual (part number 2651A-901-01) on the Product 
Information CD-ROM that came with your instrument.