Figure 3-2: Open And Short Measurements With Kelvin Cables; Figure 3-3: Open And Short Measurements With Bnc-To-Bnc Cables - IET Labs, Inc. RLC Digibridge 1693 User And Service Manual

1700-03 Kelvin Cables
Open and short should be performed as shown in
Figure 3-2 below when using Kelvin cables. When
performing an open jaws of clips must be closed.
During short it is important to match drives and sense
exactly as shown.
Open Connection
Short Connection
Figure 3-2: Open and short measurements with
Kelvin cables
1689-9602 and 1689-9602-2 bnc-to-bnc Cables
with bnc-T
Open and short should be performed as shown in
Figure 3-3 below when using bnc-to-bnc cables
with bnc-T connectors. During short connection two
Pomona 3283 bnc (F)-(F) adapters are used to connect
potential together and drives together.
Geometry:
If is important to maintain the spacing between the
leads during the open compensation at exactly the
same distance as the spacing is when the banana plugs
are connected to the DUT. If the spacing is not exactly
the same there will be an error in the measured value.
This is due to the fact that the four terminal Kelvin
connection stops at the connection between Drive
and Sense. The banana plugs are two-terminal so the
capacitance between the parallel spaced banana plugs
will be measured as part of the overall measurement
unless open compensation is performed to eliminate
this additional capacitance.
Operation
Open Connection
Short Connection
Figure 3-3: Open and short measurements with
bnc-to-bnc cables
1693 RLC Digibridge
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