Keithley 6485, User Manual, Page: 8 / 115

2 Connections
Connection fundamentals .......................................................................... 2-2
Model 6485 connections ...................................................................... 2-2
Model 6487 connections ...................................................................... 2-3
Basic connections to DUT .......................................................................... 2-5
Model 6485 DUT connections ............................................................. 2-5
Model 6487 DUT connections ............................................................. 2-6
Input voltage overload (OVRVOLT message) ............................................ 2-9
Using a test fixture ..................................................................................... 2-9
General purpose test fixture .............................................................. 2-10
Model 8009 resistivity test fixture ...................................................... 2-11
Model 6487 interlock ................................................................................ 2-12
Interlock connections ......................................................................... 2-12
Interlock operation ............................................................................. 2-12
How is the interlock different between a Model 487
and Model 6487? ............................................................................... 2-13
Analog output ........................................................................................... 2-14
Measurement considerations ................................................................... 2-15
3 Measurements and Sourcing Voltage
Measurement overview .............................................................................. 3-2
Current measurements ........................................................................ 3-2
Model 6487 voltage source .................................................................. 3-2
Performance considerations ...................................................................... 3-3
Warm-up period ................................................................................... 3-3
Voltage offset correction ...................................................................... 3-3
Autozero .............................................................................................. 3-3
Zero check and zero correct ................................................................ 3-3
Current measurements .............................................................................. 3-5
Precautions .......................................................................................... 3-5
Procedure ............................................................................................ 3-6
SCPI programming — current measurements ..................................... 3-8
Programming example — current measurements ............................... 3-9
Model 6487 ohms measurements .............................................................. 3-9
Overview .............................................................................................. 3-9
DC and alternating voltage ohms ........................................................ 3-9
Procedure ............................................................................................ 3-9
SCPI programming — ohms measurements ..................................... 3-11
Programming example — ohms measurements ...............................
3-12