The regulator controls voltage output based on the battery voltage,
under-hood temperature, and vehicle loads used. In other words, it
controls the maximum voltage the system can produce based on
the current needs and amount of current that can be produced by the
spinning of the rotor in the alternator. The normal high limit of a
typical automotive regulator is 14.7 volts +/– 0.5. Refer to the
manufacturer specifications for the correct limit, which may vary by
vehicle type and manufacturer.
A high charging rate will overcharge the battery and may decrease
its life and cause it to fail. If the battery test decision is REPLACE and
the charging system test shows a HIGH CHARGING VOLTAGE,
check the levels of the electrolyte in the battery. A symptom of
overcharging is battery fluid spewing through the vent caps, which
causes low electrolyte levels and will harm the battery.
DIODE RIPPLE NORMAL: The charging system is functioning
within its normal operating range.
EXCESS RIPPLE DETECTED: One or more diodes in the alterna-
tor are not functioning or there is stator damage, which is shown by
an excessive amount of AC or ripple current supplied to the battery.
Make sure the alternator mounting is sturdy and that the belts are
in good shape and functioning properly. If the mounting and belts
are good, replace the alternator.
An alternator is designed to create the electrical energy necessary
to charge the battery and provide for the vehicle’s electrical system
load. Since the alternator creates AC, (alternating current), it must
be rectified into DC, (direct current), to charge the battery and supply
power to the rest of the system. To accomplish this, the alternator
uses diodes which allow current flow in only one direction, changing
AC current to DC current. When one or more of the diodes fail, the
AC ripple current from the alternator to the battery will exceed
normally acceptable limits.
DIODE RIPPLE NOT DETECTED: The analyzer is not able to
detect diode ripple through the battery cables, or the alternater is
not spinning.
9. The analyzer will toggle through the CHARGING SYSTEM results
until you disconnect.
10. To display the menu options screen, press the MENU button.
11
ENGLISH
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