Voltech AT360, User Manual

Page: 424 / 470

T
ESTS AND
T
EST
C
ONDITIONS
P
AGE
7-126 V
OLTECH
AT
I
U
SER
M
ANUAL
ESR Equivalent Series Resistance
This is also a measure of the losses in the capacitor. The ESR is the
equivalent AC resistance of the series equivalent circuit. To measure ESR,
choose the test RLS in the PC editor or select Rs SERIES circuit from the front
panel LCR mode. Use the test conditions determined for the C test.
ESR is a measure of equivalent AC resistance at a specified frequency and
will be different to the expected DC resistance of contacts and leads.
Compensation
For most capacitors, and especially film and ceramic types, the dissipation
factor will be very low; typically < 0.01. The errors due to connections and lead
impedances can thus be very significant. For the best accuracy always use 4
terminal connections and perform compensation before recording
measurements