Keithley 2520, Руководство по обслуживанию, Страница: 7 / 137

Table of Contents
1 Performance Verification
Introduction ................................................................................ 1-2
Verification test requirements .................................................... 1-4
Environmental conditions ................................................... 1-4
Warm-up period .................................................................. 1-4
Line power .......................................................................... 1-4
Recommended test equipment ................................................... 1-5
Resistor characterization ..................................................... 1-5
Verification limits ...................................................................... 1-6
Example limits calculation .................................................. 1-6
Restoring factory defaults .......................................................... 1-6
Performing the verification test procedures ............................... 1-6
Test summary ...................................................................... 1-6
Test considerations ............................................................. 1-7
Testhead connections ................................................................. 1-7
Voltage measurement accuracy ................................................. 1-8
Current source accuracy ............................................................. 1-9
Current measurement accuracy ................................................ 1-13
Voltage bias source accuracy ................................................... 1-15
2 Calibration
Introduction ................................................................................ 2-2
Environmental conditions .......................................................... 2-4
Temperature and relative humidity ..................................... 2-4
Warm-up period .................................................................. 2-4
Line power .......................................................................... 2-4
Calibration considerations .......................................................... 2-4
Calibration cycle ................................................................. 2-5
Recommended calibration equipment ................................ 2-5
Resistor characterization ..................................................... 2-5
Calibration menus ...................................................................... 2-6
Unlocking calibration ................................................................. 2-7
Unlocking calibration from the front panel ........................ 2-7
Unlocking calibration by remote ........................................ 2-7
Changing the password .............................................................. 2-8
Changing the password from the front panel ...................... 2-8
Changing the password by remote ...................................... 2-8
Resetting the calibration password ............................................ 2-8
Viewing calibration dates and calibration count ........................ 2-9