8-24 Source-Measure Concepts Series 2600 System SourceMeters Reference Manual
2600S-901-01 Rev. A / May 2006 Return to Section 8 topics
Source I measure I, source V measure V
The SourceMeter can measure the function it is sourcing. When sourcing a
voltage, you can measure voltage. Conversely, if you are sourcing current, you
can measure the output current. For these measure source operations, the
measure range is the same as the source range.
This feature is valuable when operating with the source in compliance. When in
compliance, the programmed source value is not reached. Thus, measuring the
source lets you measure the actual output voltage.
Basic circuit configurations
Source I
When configured to source current (I-Source) as shown in Figure 8-11, the
SourceMeter functions as a high-impedance current source with voltage limit
capability and can measure current (I-Meter) or voltage (V-Meter).
For 2-wire local sensing, voltage is measured at the Input/Output terminals of the
SourceMeter. For 4-wire remote sensing, voltage is measured directly at the DUT
using the sense terminals. This eliminates any voltage drops that may be in the
test leads or connections between the SourceMeter and the DUT.
The current source does not require or use the sense leads to enhance current
source accuracy. With 4-wire remote sensing selected, the sense leads must be
connected or incorrect operation will result.
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