Section 1:Introduction                 Model 2231A Triple-channel DC Power Supply Reference Manual 
1-2  077100401/September 2014 
 
CD-ROM contents 
The Model 2231A-30-3 Product Information CD-ROM is shipped with each power supply. 
The Product Information CD-ROM contains: 
•  Reference Manual: Includes basic operation topics and maintenance information. 
•  Performance Verification: Contains performance verification procedures. Additional test 
equipment is required to complete the verification procedures. 
•  Accessories information: Documentation for accessories that are available for the Model 
2231A-30-3. 
For the latest drivers and additional support information, see the Keithley Instruments website
 
(http://www.keithley.com). 
 
Key features 
The Model 2231A-30-3 has the following features: 
  Three isolated output channels, including two 30 V at 3 A channels and one 5 V at 3 A channel 
  0.06% basic voltage accuracy 
  0.2% basic current accuracy 
  Less than 5 mVpp ripple and noise 
  Intelligent fan control, energy conservation and noise reduction 
  Overvoltage and overtemperature protection 
 
Standard accessories 
Accessory  Part number 
Documentation CD  077102700 
Calibration report  001165500 
 
You will also get one of the following power cords: 
Option    Description 
Option A0  North America and South America. The factory sets the line-voltage selector switch to 110 V. 
Option A1  Universal Euro. The factory sets the line-voltage selector switch to 220 V. 
Option A2  United Kingdom. The factory sets the line-voltage selector switch to 220 V. 
Option A3  Australia. The factory sets the line-voltage selector switch to 220 V 
Option A4  Chile, Italy. The factory sets the line-voltage selector switch to 220 V. 
Option A5  Switzerland. The factory sets the line-voltage selector switch to 220 V. 
Option A7  Israel. The factory sets the line-voltage selector switch to 220 V. 
Option A8  Argentina. The factory sets the line-voltage selector switch to 220 V. 
Option A9  China. The factory sets the line-voltage selector switch to 220 V. 
Option A10  India. The factory sets the line-voltage selector switch to 220 V. 
Option A11  India. The factory sets the line-voltage selector switch to 220 V. 
Option A13  Macao, Pakistan, Africa. The factory sets the line-voltage selector switch to 220 V.