Capacitance To Ground
To measure capacitors of 10 pF or less, the stray capacitance (when
the conductors are grounded, this is capacitance to ground), b etween
the measurement contacts and the conductors near the capacitor will
inuence the measurement, as shown in Figure 6-8.
Figure 6-8. Model of Capacitance to Ground
To minimize the stray capacitance of the test leads, the cen
ter
conductor of the test leads should be k
ept as short as p ossible, as
shown in Figure 6-9 (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
inuence of the stray capacitance to ground, as shown in Figure 6-9
(B).
Measurement Procedure and Examples 6-11
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