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ES51930 Datasheet(PDF) 3 Page - Cyrustek corporation

Part No. ES51930
Description  10kHz LCR analog front
Download  5 Pages
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Manufacturer  CYRUSTEK [Cyrustek corporation]
Direct Link  http://www.cyrustek.com.tw
Logo CYRUSTEK - Cyrustek corporation

ES51930 Datasheet(HTML) 3 Page - Cyrustek corporation

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Ver 2.1
14/10/23
3
ES51930
LCR/DMM analog front
Zs = Rs + jXs or |Zs|∠θ
|Z| =
2
2
Xs
Rs +
Rs = |Zs| cosθ
Xs = |Zs| sinθ
Xs/Rs = tanθ
θ
= tan-1(Xs/Rs)
If θ > 0, the reactance is inductive. In other words, if θ < 0, the reactance is capacitive.
There are two types for reactance. The one is the inductive reactance XL and the
other is the capacitive reactance XC. They could be defined as: (f = test signal frequency)
XL = 2πf L (L = Inductance)
XC =
C
2
1
f
π
(C = Capacitance)
1.5 Measurement mode
The impedance could be measured in series or parallel mode. The impedance Z in
parallel mode could be represented as reciprocal of admittance Y. The admittance could
be defined as Y = G + jB. The G is the conductance and the B is the susceptance.
Rs: Resistance in series mode
Rp: Resistance in parallel mode
Xs: Reactance in series mode
Xp: Reactance in parallel mode
Cs: Capacitance in series mode
Cp: Capacitance in parallel mode
Ls: Inductance in series mode
Lp: Inductance in parallel mode
There are two factors to provide the ratio of real part and imaginary part. Usually
the quality factor Q is used for inductance measurement and the dissipation factor D is
used for capacitance measurement. D factor is defined as a reciprocal of Q factor.
Q = 1 / D = tanθ
Q = Xs / Rs = 2πf Ls / Rs = 1 / 2πf Cs Rs
Impedance in serial mode
Rs
jXs
Z = Rs + jXs
Impedance in serial mode
Rs
jXs
Z = Rs + jXs
Admittance in parallel mode
Rp
jXp
Y = 1/Z = 1/Rp + 1/jXp = G + jB
Admittance in parallel mode
Rp
jXp
Y = 1/Z = 1/Rp + 1/jXp = G + jB


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