LAUNCH
BST-860 Battery Tester User Manual
9
After the test finished, tester displays the effective charging volts, ripple test result and
charging test result.
Check the connection between generator and battery, then retest.
3.3.1 Charging Test Result
Charging Volt: Normal. The generator output normal, no problem detected.
Charging Volt: Low. Check drive belt of the generator whether slip or running off. Check the
connection between generator and battery is normal or not. If both of the drive belt and the
connection are in good condition, follow the manufacturer's suggestion to eliminate
generator fault.
Charging Volt: High. Since most of the vehicle generators are using internal regulator, the
generator assembly has to be replaced.(Some old style cars are using external regulator,
then directly replace the regulator.) The normal high volt of the voltage regulator is
maximum 14.7
±
0.5V.If charging volt is too high, it will overcharge the battery. Therefore,
the battery life will be shortened and troubles will be caused.
No Volt Output.No generator
，
volt output is detected.Check the generator
connection cable, the drive belt of generator and engine whether normal or not.
Diode Test: Through the test of charging current ripple, tester will find out whether the diode
is normal or not. When ripple volt is too high, it proves at least one diode is damaged.
Check and replace the diode.
