Keithley 6514

Performing the verification test procedures .............................. 18-8
Test summary .................................................................... 18-8
Test considerations ............................................................ 18-8
Restoring factory defaults ......................................................... 18-9
Input bias current and offset voltage calibration ...................... 18-9
Offset voltage calibration .................................................. 18-9
Input bias current calibration ............................................. 18-9
Volts measurement accuracy .................................................. 18-10
Amps measurement accuracy ................................................. 18-12
20µA-20mA range accuracy ........................................... 18-12
20pA-2µA range accuracy .............................................. 18-13
Ohms measurement accuracy ................................................. 18-15
2k
Ω -20M Ω range accuracy ............................................. 18-15
200M
Ω -200G Ω range accuracy ...................................... 18-17
Coulombs measurement accuracy .......................................... 18-18
19 Calibration
Introduction .............................................................................. 19-2
Environmental conditions ......................................................... 19-2
Temperature and relative humidity..................................... 19-2
Warm-up period ................................................................. 19-2
Line power ......................................................................... 19-2
Calibration considerations ........................................................ 19-3
Calibration cycle ................................................................ 19-3
Recommended calibration equipment ...................................... 19-3
Calibration errors ...................................................................... 19-5
Calibration menu ...................................................................... 19-5
Aborting calibration .................................................................. 19-5
Current and charge calculations ............................................... 19-6
Manual calculations............................................................ 19-6
Automatic calculations ...................................................... 19-6
Calibration procedure ............................................................... 19-7
Preparing for calibration .................................................... 19-7
Input bias current and offset voltage calibration ............... 19-7
Volts calibration ................................................................. 19-8
Amps calibration ............................................................. 19-10
Coulombs calibration ...................................................... 19-14
Ohms calibration ............................................................. 19-16
Entering calibration dates and saving calibration ............ 19-18
Locking out calibration ................................................... 19-18
Changing the calibration code ................................................ 19-18
Resetting the calibration code ................................................ 19-19
Displaying calibration dates ................................................... 19-19
Displaying the calibration count ............................................. 19-20