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2400 Series SourceMeter
®
User’s Manual
Source-Measure Concepts
6-31
Basic circuit configurations
Source I
When configured to source current (I-Source) as shown in
Figure 6-15
, the SourceMeter
functions as a high-impedance current source with voltage limit capability and can mea-
sure 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 ter-
minals. 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
”).
Figure 6-15
Source I
Remote
SENSE HI
IN/OUT HI
Remote
IN/OUT LO
I-Source
x1
V-Meter
SENSE LO
Local
Local
GUARD SENSE
GUARD
+
–
I-Meter
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Содержание SourceMeter 2400
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