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4.2 Setting the Parameters to be Displayed
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4.2.3 Series Equivalent Circuit Mode and Parallel Equivalent
Circuit Mode
Series equivalent circuit
Parallel equivalent circuit
NOTE
The 3532-50 unit obtains the impedance Z and the phase angle
θ
by
measuring the current and voltage across the test sample. The other
measurement parameters, like an inductive component L, a capacitive
component C, a resistive component R, etc. are calculated based on the Z
and
θ
.
A series-equivalent circuit mode is the mode in which the calculation is
performed assuming that resistive components are connected in series to C
(or L), while a parallel-equivalent circuit mode is the calculation assuming
that resistive components are connected in parallel.
The appropriate selection of the equivalent circuit modes will enable the
more accurate calculation results.
Generally, for measurement of a low impedance device (approx. less than
100
Ω
) like a large capacitance capacitor or a low inductance, a series-
equivalent circuit mode will be selected. While, for a high impedance
device (approx. more than 10 k
Ω
) like a small capacitance capacitor or a
high inductance, a parallel-equivalent circuit mode will be selected.
When you are not sure about selection of circuit mode, please ask the parts
maker. (ex. a impedance approx. between 100
Ω
and 10 k
Ω
)
Because measurement value in each equivalent circuit mode is obtained
through calculation, measurement values of both modes can be displayed.
However, please note that the appropriate equivalent circuit depends on the
test sample.
