Keithley 2015, Service Manual

Page: 8 / 158

Resistance calibration .................................................................. 2-11
DC current calibration ................................................................. 2-12
AC voltage calibration ................................................................. 2-13
AC current calibration ................................................................. 2-14
Distortion calibration ................................................................... 2-14
Function generator calibration ..................................................... 2-15
Setting calibration dates and saving calibration .......................... 2-16
Remote calibration ....................................................................... 2-16
Preparing the Model 2015 for calibration .................................... 2-17
Short and open calibration ........................................................... 2-17
DC volts calibration ..................................................................... 2-18
Resistance calibration .................................................................. 2-19
DC current calibration ................................................................. 2-20
AC voltage calibration ................................................................. 2-21
AC current calibration ................................................................. 2-22
Distortion calibration ................................................................... 2-22
Function generator calibration ..................................................... 2-23
Programming calibration dates .................................................... 2-23
Saving calibration constants ........................................................ 2-23
Locking out calibration ................................................................ 2-23
Manufacturing calibration ............................................................... 2-24
Recommended test equipment ..................................................... 2-24
Unlocking manufacturing calibration .......................................... 2-24
Measuring synthesizer signal amplitude ...................................... 2-24
Front panel manufacturing calibration ......................................... 2-25
Remote manufacturing calibration .............................................. 2-26
3
Routine Maintenance
Introduction ....................................................................................... 3-2
Setting the line voltage and replacing the line fuse ....................... 3-2
Replacing the AMPS fuse .............................................................. 3-3
4
Troubleshooting
Introduction ....................................................................................... 4-2
Repair considerations ........................................................................ 4-3
Power-on self-test .............................................................................. 4-4
Front panel tests ................................................................................ 4-5
KEY test ......................................................................................... 4-5
DISP test ........................................................................................ 4-5
Principles of operation ...................................................................... 4-6
Power supply ................................................................................. 4-6
Display board ................................................................................. 4-8
Digital circuitry .............................................................................. 4-9