Hioki 3532-50 - Page 178

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7.2 Testing Parameters and Calculation Equations
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Z
Real part
Imaginary part
R
jX
Z
I
V
θ
Z : impedance (Ω)
θ
: phase angle (degrees)
R :resistance(Ω)
X : reactance (Ω)
|Z| : absolute value of impedance (Ω)
Real part
Imaginary part
jB
G
Y
φ
Y : admittance (S)
G : conductance (S)
B : susceptance (S)
|Y|: absolute value of admittance (S)
7.2 Testing Parameters and Calculation Equations
Normal circuit elements etc. are assessed with regard to their characteristics
in terms of their impedance Z. The 3532-50 for subjects such circuit
components to an alternating current signal at a certain test frequency,
measures their voltage and current vectors, and from these values obtains the
impedance Z and the phase angle θ . It is then possible to obtain the
following quantities from the impedance Z by displaying it upon the
complex plane.
Z = R +jX
θ =tan
-1
(X/R)
Moreover, it is possible to use the admittance Y, which as a characteristic of
a circuit component is the reciprocal of the impedance Z.
By displaying the admittance Y upon the complex plane (just as was done
for the impedance Z) the following quantities can be obtained:
Y = G +jB
φ=tan
-1
(B/G)