4: Source-measure considerations Model 2450 Interactive SourceMeter® Instrument
4-16 2450-901-01 Rev. B/September 2013
Connecting the Model 2450 output to a custom test fixture
Keithley Instruments offers several accessories that can help you when building a custom test fixture
or system.
You can use high voltage coaxial or triaxial connectors on your test fixture. The following sections
show you how to connect from the Model 2450 to the custom fixture and also how to make
connections to the device inside the custom fixture.
For the Sense LO and Force LO terminals, the center conductor and first shield should be within a
few volts of each other to guarantee normal operation.
Figure 120: Model 2450 Sense LO and Force LO terminal
Figure 121: Model 2450 Force LO terminal
Connections to LO on the Model 2450 are not necessarily at 0 V. Hazardous voltages could
exist between LO and chassis ground. Make sure that high-voltage precautions are taken
throughout the test system. Alternatively, limit hazardous levels by adding external
protection to limit the voltage between LO and chassis. Failure to make sure high-voltage
precautions are used throughout the test system or a failure to limit hazardous levels could
result in severe personal injury or death from electric shock.
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