Hioki IM7580, Инструкция по эксплуатации

Страница: 317 / 340

A
5
Selecting the Equivalent Circuit Model
Appx. 4 Selecting the Equivalent Circuit Model
When using the equivalent circuit function, it is important to select an appropriate equivalent circuit
model.
The following table provides examples of measuring objects and equivalent circuit models using
circuit element Model A to Model E.
Measuring object
Corresponding equivalent
circuit model
Inductor
Inductor with high core loss and low ESR A
Comparatively high ESR B
Capacitor
Significant leak resistance effect C
Typical capacitor D
Resistor
Low resistance value, significant inductance effect B
High resistance value, significant stray capacitance effect C
Piezoelectric
element
- E
Because the models for which parameters can be accurately acquired varies depending on the
observed values, perform a simulation for estimated results and select the equivalent circuit model
based on the comparison with observed values.
When automatically selecting the equivalent circuit model, it will not be possible to select the
optimal model if the acquisition of frequency characteristics fails to yield local extreme values.
Therefore, set the sweep range so that resonance characteristics can be accurately acquired.
10
9
8
7
6
5
4
3
2
1
Appx.
Ind.