Bk-precision 889B - Manual Manual do Utilizador descarregar pdf (Página 31)

 Inductor

The impedance and inductance of a inductor are positively proportional when test frequency is fixed.

Therefore, the larger inductance equals to higher impedance and vice versa. Figure 4.9 shows the equivalent

circuit of inductor. When the inductance is small, the Rs becomes more important than the Rp. When the

inductance is large, the Rp should be taking into consideration. Therefore, it is properly using series mode to

measure an inductor with low inductance and parallel mode to measure an inductor with high inductance.

Small capacitor

(High impedance)

Effect

No Effect

Large capacitor

(Low impedance)

Effect

No Effect

Figure 4.9

Small inductor

(Low impedance)

Large inductor

(High impedance)

Effect

No Effect

Effect

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Bk-precision 889B - Manual Manual do Utilizador Página 31