Voltech AT360, User Manual

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V
OLTECH
AT
I
U
SER
M
ANUAL
P
AGE
7-105
7.1.26 ANGL – P
HASE
A
NGLE OF
I
MPEDANCE
Measurement
Range
Test
Voltage
Test
Frequency
Basic
Accuracy
-360
°
to +360
° 1mV to 5V 20Hz to 3MHz
0.05
°
The impedance of a winding is usually complex as it consists of real
(resistive) and inductive or capacitive (imaginary) parts. The phase angle
φφφφ
, of the complex impedance at a specified frequency is:
φφφφ
= tan
-1
(X / R)
Where R and X are the real and imaginary parts of the complex
impedance.
See also the impedance test, Z, which measures the magnitude of the
impedance:

Z

=
√√√√
(R
2
+ X
2
)
Where Used
An impedance phase angle test may be performed on any ferrite or iron cored
winding, but it is an especially important test of audio, telecommunication and
other signal components where the angle of the impedance is important.