Contact Resistance - Keysight E4980A User Manual

Measurement Procedure and Examples
Measurement Contacts

Contact Resistance

Contact resistance between the contacting terminals and the DUT causes
measurement error when measuring large values of capacitance, especially in
D (dissipation factor) measurements.
When measuring large capacitance values, the four-terminal measurement
contacts have the advantage of less measurement error as compared to the
two-terminal method. Select a test fixture which can hold the DUT tightly to
stabilize the connection.
Figure 7-11 Contact resistance
DUT DUT
(A) Two-Terminal Method (A) Four-Terminal Method
Keysight E4980A/AL Precision LCR Meter 199