Topdon AL500B Manuel De L'utilisateur page 40

5. The test results will appear on the display. Please refer to
the chart below to understand the test results.
Item
1
2
3
4
Loaded/Unloaded Voltage and Ripple:
● The Loaded Voltage means the voltage measured
when turning on the on-board electrical appliances (e.g.,
headlights).
● Unloaded Voltage refers to the voltage measured when
turning off the on-board electrical appliances.
● Ripple: A vehicle's battery operates on one-way direct
current (DC) electricity, while alternators output
alternating current (AC) electricity. In this process, the
power needs to go through the diode rectifier to turn
into a direct current - that's when the ripple occurs.
Voltage(V)
<12.8V
12.8V≤, and <13.2V
13.2V≤, and <15V
≥15.0V
Figure 4.4.5
Conclusion
No Output
Charging Low
Charging Normal
Charging High