Keithley 6482 - Page 5

Table of Contents Model 6482 Dual-Channel Picoammeter / Voltage Source Reference Manual
2 6482-901-01 Rev. A / August 2012
Current measurement connections ...................................................... 2-5
Voltage source connections ................................................................. 2-6
Connection considerations................................................................... 2-6
Ground connect mode connections...................................................... 2-7
Analog output connections.......................................................................... 2-8
Nonisolated connections ...................................................................... 2-8
Isolated connections............................................................................. 2-9
Equivalent circuits .............................................................................. 2-10
3 Basic Operation...................................................................................... 3-1
Operation overview..................................................................................... 3-2
Measurement and voltage bias capabilities.......................................... 3-2
Ranges................................................................................................. 3-2
Compliance .......................................................................................... 3-2
Basic circuit configuration..................................................................... 3-3
Operation considerations............................................................................ 3-3
Warm-up............................................................................................... 3-3
Autozero............................................................................................... 3-3
Source delay ........................................................................................ 3-4
Ground connect mode.......................................................................... 3-6
Basic measurement procedure................................................................... 3-8
Output control....................................................................................... 3-8
Basic measurement circuit configuration.............................................. 3-8
Front-panel measurement procedure................................................... 3-8
Remote command measurement procedure........................................ 3-9
Using the analog outputs .......................................................................... 3-11
4 Range, Digits, Speed, and Filters....................................................... 4-1
Range and digits......................................................................................... 4-2
Measurement range ............................................................................. 4-2
Digits .................................................................................................... 4-3
Remote range and digits programming ................................................ 4-4
Range and digits programming example.............................................. 4-4
Speed.......................................................................................................... 4-4
Setting speed ....................................................................................... 4-5
Remote speed programming................................................................ 4-5
Filters .......................................................................................................... 4-6
Filter stages.......................................................................................... 4-6
Filter configuration................................................................................ 4-9
Filter control.......................................................................................... 4-9
Remote filter programming................................................................. 4-11
5 Relative, Math, Ratio, and Delta ......................................................... 5-1
Relative....................................................................................................... 5-2
Front panel relative offset..................................................................... 5-2
Remote relative offset programming .................................................... 5-3
Measurement math functions...................................................................... 5-4
Math functions ...................................................................................... 5-4
Front panel math functions................................................................... 5-5
Remote math functions ........................................................................ 5-6
Math function programming example ................................................... 5-6
RATIO and DELTA ...................................................................................... 5-6
RATIO functions ................................................................................... 5-7
DELTA functions................................................................................... 5-7
Front panel RATIO and DELTA configuration....................................... 5-8
Remote RATIO and DELTA .................................................................. 5-8
RATIO and DELTA function programming example ............................. 5-9
6 Data Store ................................................................................................ 6-1
Data store overview .................................................................................... 6-2
Front-panel data store................................................................................. 6-2
Storing readings ................................................................................... 6-2
Recalling readings................................................................................ 6-2
Buffer statistics ..................................................................................... 6-3
Timestamp format................................................................................. 6-4