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Android-based Scopebox User’s Manual
energy after the spark;
Section
c
shows the make contact magnetic period of primary coil.
Seen from the waveform, the amplitudes of breaker contact closed angle,
break angle and breakdown voltage and spark voltage are very clear, besides,
the spark delay period and two oscillations can also be tested. For the ignition
system without faults, compared with the whole cycle, the contact closed angle
just 45%-50% (four-cylinder), 63%-70% (six-cylinder), or 64%-71%
(eight-cyliner); the breakdown voltage is over 15kv; the spark voltage is about
9kV, the spark period is greater than 0.8ms. If these values or waveform are
abnormal, it means there is fault or the system needs to be adjusted.
4.2 Secondary-simultaneous ignition analysis
Connections: Plug the BNC end of secondary ignition pickup into
CH1/CH2/CH3/CH4 channel of Scopebox, then connect the high-voltage clip
to high-voltage line, and crocodile clips to ground.
Connection as shown in figure 4-2:
Fig. 4-2