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2400 Series SourceMeter
®
User’s Manual
Connections
2-7
WARNING
When sourcing voltage in remote sense, make sure the sense leads are
connected to the DUT. If a sense lead becomes disconnected, 0V will be
sensed, and the SourceMeter will increase the output voltage (to possi-
bly hazardous levels) to compensate. For increased safety, you can
limit the voltage output by the SourceMeter. See
Section 3
, “
V-source
protection
,” to limit the output voltage level.
NOTE
When the output is turned off in the 4-wire sense mode, the sense lines are inter-
nally disconnected for safety reasons. The sense lines are automatically recon-
nected when the output is turned on, and 4-wire sensing is restored.
2-wire local sensing
2-wire local sense connections can only be used if the error contributed by test lead IR
drop is acceptable to the user. At current levels below 100mA, the errors are usually not
significant (assuming test lead resistance is not greater than 1
Ω
).
Since current in a series circuit is the same at all points in the loop, remote sensing does
not improve I-Source or I-Measure accuracy. Thus, if sourcing current and measuring cur-
rent, you can use local sensing. Other conditions that allow the use of 2-wire local sensing
include:
•
Test circuit impedance is 1k
Ω
. Above 1G
Ω
, guarding should also be used (“
Cable
guard
”).
•
Measure Only (V or I) operation.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
Содержание SourceMeter 2400
Страница 508: ...A Specifications Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...
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Страница 534: ...D IEEE 488BusOverview Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...
Страница 554: ...F ContactCheckFunction Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...
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