Chapter 3 Automotive Test
23
3.1.1
12V Charging
12V charging is suitable for gasoline vehicles. Use a BNC to banana cable, one end is connected to channel 1 of the
oscilloscope, and the other end is connected to the positive and negative electrodes of the battery using two large
alligator clips (the red wire is connected to the red clip to the positive electrode, and the black wire is connected to
the black clip. negative electrode). If you need to measure current, please use a current clamp of 600A and above,
connect the BNC of the current clamp to channel 2, turn on the switch of the current clamp, and clamp the current
clamp to the output power line of the generator.
The alternator provides power to the vehicle. There is little difference between different manufacturers. The charging
voltage is generally between 13.5V and 15.0V. It is not good if it is too large or too small. The output current of the
generators of different models of different manufacturers is not the same, so it needs to be estimated according to
the vehicle.
Note: The generator adopts AC power generation. The voltage is converted to DC through multiple rectifier diodes.
The voltage can be measured by a multimeter. However, when the diodes are damaged, the multimeter displays the
correct readings, and the waveform can be judged by an oscilloscope.
The specific operation is shown in Figure 3-2:
Figure 3-2 12V Charging
Summary of Contents for ATO1000 Series
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Page 2: ...Version Info Version Date Remarks V1 0 2020 06 ...
Page 52: ...Chapter 3 Automotive Test 49 Figure 3 30 Electronic fuel pump test ...
Page 71: ...68 Figure 3 49 K line test ...
Page 79: ...76 Figure 3 57 Mazda 6 Cylinder internal pressure measurement ...
