System SourceMeter® Instrument Reference Manual Section 2:
2600BS-901-01 Rev. B / May 2013 2-75
Figure 40: Models 2634B and 2636B SMU connections (Model 2635B similar)
The external voltage source can be a SMU of a second Series 2600B instrument or other instrument.
Keep in mind that if the combined outputs of the sources exceeds 42 V, then a safety shield will be
required for the DUT (see the following WARNINGS).
The maximum floating (common mode) voltage for a SMU is ±250 V. Exceeding this level may
cause damage to the instrument and create a shock hazard.
Using an external source to float a SMU could create a shock hazard in the test circuit. A
shock hazard exists whenever >42 V peak is present in the test circuit. Appropriately rated
cables or insulators must be provided for all connections to prevent access to live parts.
When >42 V is present, the test circuit must be insulated for the voltage used or surrounded
by a metal safety shield that is connected to a known protective earth (safety ground) and
chassis ground (see
Safety shield
(on page
)).
DUT connection settings
Make sure to properly configure the Series 2600B sense mode for the specific DUT test connection
scheme. Use care to configure the output-off state to supplement safe operation of your test setup.
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