User Manual

2400 Series SourceMeter
®
User’s Manual Source-Measure Concepts 6-23
Basic circuit configurations
Source I
When configured to source current (I-Source) as shown in Figure 6-14, the
SourceMeter functions as a high-impedance current source with voltage limit
capability and can measure current (I-Meter) or voltage (V-Meter).
For voltage measurements, the sense selection (2-wire local or 4-wire remote)
determines where the measurement is made. In local sense, voltage is measured
at the Input/Output terminals of the SourceMeter.
In 4-wire remote sense, voltage can be 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.
NOTE 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. Over-voltage protection
(OVP) can be used if the potential for sense lead disconnection exists
(see
Section 3, “V-source protection”).