Keithley SourceMeter 2600B Series, Справочное руководство

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Section 2: General operation Series 2600B System SourceMeter® Instrument Reference Manual
2-56 2600BS-901-01 Rev. C / August 2016
Figure 21: Four-wire connections (remote sensing)
Contact check connections
The Models 2604B, 2614B, and 2634B do not perform contact check measurements.
The contact check function prevents measurement errors due to excessive resistance in the source
or sense leads. See Contact check measurements (on page 2-45) for operation.
Contact check requires both source and sense connections. Refer to 4-wire remote sensing
connections (on page 2-55) for connection scheme.
Multiple SMU connections
The Series 2600B System SourceMeter ® instrument and its associated cabling are designed
to be safe when operated correctly in a 3000 V system. They are only warranted to the
maximum voltage and current ratings of the instrument. Connecting two Series 2600B
instruments in parallel or in series may result in voltages or power levels that exceed the
safety mechanisms. This increases the risk of instrument damage and the possibility of
personal injury or death due to electric shock. The user assumes all of the associated risks
of combining the outputs of two or more Series 2600B instruments.
Connections to LO on the Series 2600B 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.