In this appendix: 
Overview .................................................................................. C-1 
Environmental conditions ......................................................... C-1 
Calibration considerations ........................................................ C-2 
Calibration connection .............................................................. C-6 
Front-panel calibration procedure........................................... C-10 
Remote calibration procedure ................................................ C-16 
Change the calibration password ........................................... C-24 
Calibration constants .............................................................. C-25 
 
 
Overview 
Use the procedures in this section to calibrate the Keithley Instruments Series 2280 Precision DC 
Power Supply. 
The information in this section is intended for qualified service personnel only. Do not 
attempt these procedures unless you are qualified to do so.   
Some of these procedures may expose you to hazardous voltages that if contacted, could 
cause personal injury or death. Use appropriate safety precautions when working with 
hazardous voltages. 
Calibration can be performed by using the front panel or SCPI commands.   
The calibration steps test the source, over protection, and measurement circuitry. 
 
Environmental conditions 
Conduct the verification procedures in a location that has: 
  An ambient temperature of 18 °C to 28 °C 
  A relative humidity of less than 70%, unless otherwise noted 
 
Calibration and adjustment