Huntron TRACKER 2700 - Page 55

5-
13
Effect of Frequency (F
s
) on the Signature of a 0.1 µ
µµ
µF Capacitor
F
S
= 20 Hz. F
S
= 60 Hz. F
S
= 200 Hz. F
S
= 2000 Hz.
15V, 1kΩ
ΩΩ
Ω Range.
Figure 5-16. Signatures of a 0.1 µF Capacitor at Different Frequencies
Note that as the test signal frequency increases, each signature changes from a horizontal
elliptical pattern to a vertical elliptical pattern. In TSA, a small value capacitor at a low test
frequency has a signature that looks similar to an open circuit. Likewise, a small value capacitor
at a high test frequency has a signature that's similar to a short circuit. The signature of the
0.1µF capacitor is similar to the 10 µF capacitor in shape but not in size due to the differences in
their value.
Effect of Voltage (V
S
) on the Signature of a 1 µ
µµ
µF Capacitor
V
S
= 200 mV V
S
= 5 V V
S
= 10V V
S
= 15 V
10kΩ
ΩΩ
Ω Range, F
s
= 60Hz
Figure 5-17. Signatures of a 1 µF Capacitor at Different Test Signal Voltages
Notice that as V
s
changes there is no effect on the component signatures.