Oscilloscope Patterns and Waveforms

MEASUREMENT METHOD
Connect the analyzer special patterns pick-up to the generator "B" terminal.

STANDARD WAVEFORM




Observation Conditions




NOTE: The voltage waveform of the generator "B" terminal can undulate as shown at left. This waveform is produced when the regulator operates according to fluctuations in the generator load (current), and is normal for the generator. If the ripple height is abnormally high (approximately 2 V or more during idling), the wires between the generator B terminal and the battery have broken due to fuse blowing, etc. The generator is usually operating properly

ABNORMAL WAVEFORMS EXAMPLES




NOTE: The size of the waveform patterns differs largely depending on the adjustment of the variable knob on the analyzer

NOTE: Identification of abnormal waveforms is easier when there is a large output current (regulator is not operating) (Waveforms can be observed when the headlights are illuminated.)

NOTE: Check the conditions of the charging indicator light (illuminated/not illuminated) also, and carry out a total check of the system.