198 Keysight E4980A/AL Precision LCR Meter
Measurement Procedure and Examples
Measurement Contacts
7-
Figure 7-9 Model of Capacitance to Ground
To minimize the stray capacitance of the test leads, the center conductor of
the test leads should be kept as short as possible, as shown in Figure 7-10 (A).
If four-terminal pair connections are close to the point where contact is made
with the DUT, interconnect the shields of the measurement terminals to the
conductor to reduce the influence of the stray capacitance to ground, as
shown in Figure 7-10 (B).
Figure 7-10 Reducing capacitance to ground
Low
Cl cannot
be ignored
High
Ch can
be ignored
Cx
Cl Ch
Grounded Conductor
㪼㪋㪐㪏㪇㪸㫌㪼㪈㪇㪏㪍
LPOT
LCUR
HCUR
HPOT
Cx
Cl Ch
Grounded Conductor
(B) Reducing the influence of
the capacitance to ground
Grounded Conductor
(A) Reducing capacitance to ground
C
as short as
possible
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