Keithley 6485 - Page 14

Calibration procedure ............................................................... 16-6
Preparing for calibration .................................................... 16-6
Offset voltage calibration .................................................. 16-7
Current calibration ............................................................. 16-7
20mA-20mA range calibration .................................. 16-7
2nA-2mA range calibration ....................................... 16-9
Entering calibration dates and saving calibration ............ 16-11
Locking out calibration ................................................... 16-12
Calibration support ................................................................. 16-12
Changing the calibration code ......................................... 16-12
Resetting the calibration code ......................................... 16-12
Displaying calibration dates ............................................ 16-13
Displaying the calibration count ..................................... 16-13
17 Routine Maintenance
Introduction .............................................................................. 17-2
Setting line voltage and replacing line fuse .............................. 17-2
Front panel tests ........................................................................ 17-3
DISP test ............................................................................ 17-4
KEY test ............................................................................ 17-4
A Specifications
B Status and Error Messages
C General Measurement Considerations
Measurement considerations ..................................................... C-2
Ground loops ...................................................................... C-2
Triboelectric effects ............................................................ C-3
Piezoelectric and stored charge effects ............................... C-3
Electrochemical effects ...................................................... C-4
Humidity ............................................................................. C-4
Light ................................................................................... C-4
Electrostatic interference .................................................... C-4
Magnetic fields ................................................................... C-5
Electromagnetic Interference (EMI) .................................. C-5
D DDC Emulation Commands
DDC language ........................................................................... D-2
Status Byte Format ........................................................... D-12