Keithley 6221 User Manual

Recommended test equipment .............................................................................. 16-4
Test equipment connections .......................................................................... 16-4
Calculating test limits ........................................................................................... 16-4
Example limit calculation .............................................................................. 16-4
Restoring factory defaults ..................................................................................... 16-5
Test summary and considerations ......................................................................... 16-5
Test summary ................................................................................................ 16-5
Test considerations ........................................................................................ 16-5
Verification procedures ......................................................................................... 16-6
DC current output accuracy ........................................................................... 16-6
Compliance accuracy .................................................................................... 16-8
Waveform function accuracy ......................................................................... 16-9
17 Calibration
Introduction .......................................................................................................... 17-2
Calibration requirements ...................................................................................... 17-3
Environmental conditions .............................................................................. 17-3
Warm-up period ............................................................................................. 17-3
Line power ..................................................................................................... 17-3
Recommended calibration equipment .................................................................. 17-4
Calibration equipment connections ............................................................... 17-4
Restoring factory defaults ..................................................................................... 17-4
Calibration summary and considerations ............................................................. 17-5
Calibration summary ..................................................................................... 17-5
Calibration considerations ............................................................................. 17-5
Calibration procedures .......................................................................................... 17-5
Front panel calibration .................................................................................. 17-5
Remote calibration ...................................................................................... 17-14
SCPI commands — calibration .......................................................................... 17-20
Calibration dates, count, and password .............................................................. 17-24
Viewing calibration dates and count ........................................................... 17-24
Changing the calibration password ............................................................. 17-24
A Specifications
B Error and Status Messages
Introduction ............................................................................................................ B-2
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Keithley 6221 Specifications

General

Interface	GPIB, RS-232
Communication Interface	GPIB, RS-232
Current Sourcing Accuracy	±(0.03% of output + 20 pA)
Current Sinking Accuracy	±(0.03% of output + 20 pA)
Output Resolution	100 fA
Output Accuracy	±(0.03% of output + 20 pA)
Power Requirements	100 V to 240 V AC, 50/60 Hz