When sourcing current, you can measure voltage or current, as shown in the following figure.
Figure 2: Fundamental source-measure configuration: Source I
See the following topics for detailed information.
Source V
When configured to source voltage (V-source) as shown in the following figure, the 2600B functions
as a low-impedance voltage source with current limit capability and can measure current (I-meter) or
voltage (V-meter).
Sense circuitry is used to monitor the output voltage continuously and make adjustments to the
V-source as needed. The V-meter senses the voltage at the HI / LO terminals (2-wire local sense) or
at the device under test (DUT) (4-wire remote sense using the sense terminals) and compares it to
the programmed voltage level. If the sensed level and the programmed value are not the same, the
V-source is adjusted accordingly. Remote sense eliminates the effect of voltage drops in the test
leads, ensuring that the exact programmed voltage appears at the DUT. With 4-wire sensing enabled,
both remote sense leads must be connected or incorrect operation occurs. For the 2601B, 2602B,
2611B, 2612B, 2635B, and 2636B, use contact check to verify that the sense leads are connected
(see Contact check measurements (on page 2-22)).
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