ii
2.7
Resistance and resistivity measurements ..........................................................................................................
2-32
2.7.1
Resistance measurements .........................................................................................................................
2-33
2.7.2
Resistivity measurements .........................................................................................................................
2-36
2.7.3
Ohms configuration ..................................................................................................................................
2-39
2.7.4
Multiple display ........................................................................................................................................
2-42
2.7.5
Ohms measurement considerations ..........................................................................................................
2-42
2.8
Charge measurements (Q) ................................................................................................................................
2-42
2.8.1
Basic measurement procedure ..................................................................................................................
2-43
2.8.2
Coulombs configuration ...........................................................................................................................
2-43
2.8.3
Charge measurement considerations ........................................................................................................
2-45
2.9
Voltage source ..................................................................................................................................................
2-46
2.9.1
Sourcing options .......................................................................................................................................
2-46
2.9.2
Setting voltage source value .....................................................................................................................
2-48
2.9.3
Voltage and current limit ..........................................................................................................................
2-49
2.9.4
Interlock and test fixtures .........................................................................................................................
2-50
2.9.5
Operate .....................................................................................................................................................
2-50
2.10
Analog outputs ..................................................................................................................................................
2-50
2.10.1
2V analog output ......................................................................................................................................
2-51
2.10.2
Preamp out ................................................................................................................................................
2-52
2.11
Using external feedback ...................................................................................................................................
2-54
2.11.1
Electrometer input circuitry ......................................................................................................................
2-54
2.11.2
Shielded fixture construction ....................................................................................................................
2-54
2.11.3
External feedback procedure ....................................................................................................................
2-55
2.11.4
Non-standard coulombs ranges ................................................................................................................
2-56
2.11.5
Logarithmic currents ................................................................................................................................
2-56
2.11.6
Non-decade current gains .........................................................................................................................
2-57
2.12
Range and resolution ........................................................................................................................................
2-57
2.12.1
Measurement range ..................................................................................................................................
2-57
2.12.2
Display resolution .....................................................................................................................................
2-57
2.13
Zero check, relative, and zero correct ..............................................................................................................
2-58
2.13.1
Zero check ................................................................................................................................................
2-58
2.13.2
Relative (REL) ..........................................................................................................................................
2-59
2.13.3
Zero correct ..............................................................................................................................................
2-60
2.13.4
“Properly zeroed” (as defined for instrument specifications) ..................................................................
2-60
2.14
Test sequences ..................................................................................................................................................
2-60
2.14.1
Test descriptions .......................................................................................................................................
2-60
2.14.2
Configure Test Sequence ..........................................................................................................................
2-68
2.14.3
Running the selected test ..........................................................................................................................
2-70
2.15
Triggers .............................................................................................................................................................
2-71
2.15.1
Trigger model ...........................................................................................................................................
2-73
2.15.2
Basic trigger configuration .......................................................................................................................
2-76
2.15.3
Advanced trigger configuration ................................................................................................................
2-77
2.15.4
External triggering ....................................................................................................................................
2-81
2.15.5
Trigger Link ..............................................................................................................................................
2-83
2.16
Buffer ................................................................................................................................................................
2-94
2.16.1
Configuring data storage ..........................................................................................................................
2-96
2.16.2
Storing and recalling readings ..................................................................................................................
2-98
2.16.3
Buffer multiple displays .........................................................................................................................
2-100
2.17
Filters ..............................................................................................................................................................
2-100
2.17.1
Digital filters ...........................................................................................................................................
2-101
2.17.2
Median filter ...........................................................................................................................................
2-101
2.17.3
Configuring the filters ............................................................................................................................
2-103
2.18
Math ................................................................................................................................................................
2-105
2.18.1
Polynomial ..............................................................................................................................................
2-105
2.18.2
Percent ....................................................................................................................................................
2-105
2.18.3
Percent deviation ....................................................................................................................................
2-105
