5
CF65/75/85 series
General
COMPONENTS
1-3
1.3 SIGNAL MEASUREMENTS
Sine--wave signal (AC voltage)
This signal changes polarity regularly in relation
to the “0” line.
Frequency
The frequency is shown in Hertz (Hz).
The number of complete sines per second is the
frequency of the signal (3 Hz in the diagram).
Voltage
If the number of sines per second increases, not
just the frequency increases but also the
voltage.
Measuring a sine wave signal
The sine wave signal can be measured in the
following ways using a multimeter:
-
Multimeter in the frequency position (Hz).
This measures the number of complete
sines per second.
-
Multimeter in the AC voltage position.
This measures the average value of the
supplied voltage.
Sine wave signals in the vehicle
-
Wheel speed sensor output signal.
-
Engine speed sensor output signal.
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