Keithley 2303, Service Manual, Page: 7 / 104

Table of Contents
1
Performance Verification
Introduction............................................................................................. 1-2
Verification test requirements ................................................................. 1-2
Environmental conditions ................................................................ 1-2
Warm-up period ............................................................................... 1-2
Line power ....................................................................................... 1-3
Recommended test equipment ................................................................ 1-3
Resistor connections ........................................................................ 1-3
Resistor considerations .................................................................... 1-4
Verification limits.................................................................................... 1-4
Example limits calculation............................................................... 1-4
Performing the verification test procedures ............................................ 1-5
Test summary ................................................................................... 1-5
Test considerations........................................................................... 1-5
Instrument programming ........................................................................ 1-5
Output voltage accuracy.......................................................................... 1-5
Voltage readback accuracy...................................................................... 1-7
Compliance current accuracy.................................................................. 1-7
Current readback accuracy...................................................................... 1-9
5A range readback accuracy ............................................................ 1-9
Models 2303 and 2303B 5mA range readback accuracy............... 1-10
Model 2303-PJ 500mA range readback accuracy ......................... 1-11
Digital voltmeter input accuracy........................................................... 1-13
2
Calibration
Introduction............................................................................................. 2-2
Environmental conditions ....................................................................... 2-2
Temperature and relative humidity .................................................. 2-2
Warm-up period ............................................................................... 2-2
Line power ....................................................................................... 2-2
Calibration considerations ...................................................................... 2-2
Calibration cycle .............................................................................. 2-3
Recommended calibration equipment..................................................... 2-3
Resistor connections ........................................................................ 2-3
Resistor considerations .................................................................... 2-4
Front panel calibration ............................................................................ 2-4
Model 2303 front panel calibration.................................................. 2-4
Model 2303-PJ front panel calibration .......................................... 2-10
Remote calibration ................................................................................ 2-14
Remote calibration commands....................................................... 2-14
Remote calibration display ............................................................ 2-15
Models 2303 and 2303B remote calibration procedure ................. 2-15
Model 2303-PJ remote calibration procedure................................ 2-18
Changing the calibration code .............................................................. 2-21
深圳德标仪器
135-1095-0799