Bahco BBT80 Original Instructions Manual page 12

6. Press «ENTER» for the charging system with accessory
loads. Turn on the blower to high (heat), high beam
headlights, and rear defogger. Do not use cyclical loads
such as air conditioning or windshield wipers.
7. When testing older model diesel engines, the users need
to run up the engine to 2500 rpm for 15 secs.
8. Press «ENTER» to read the ripple from the charging system to the battery. One of the three
testing results will be displayed along with the actual testing measured.
RIPPLE DETECTED NORMAL
Diodes function well in the alternator / starter.
NO RIPPLE DETECT
Ripple is not detected.
EXCESS RIPPLE DETECTED
One or more diodes in the alternator are not functioning
or there is stator damage. Check to ensure 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.
9. Press the «ENTER» key to continue the charging system with accessory loads. One of the
three results will be displayed along with the actual testing measured.
CHARGING SYSTEM HIGH WHEN TEST WITH
ACCESSORY LOADS
The voltage output from the alternator to the battery
exceeds the normal limits of a functioning regulator.
Check to ensure there are no loose connections and that the ground connection is normal. If
there are no connection issues, replace the regulator. Since most alternators have the
regulator built-in, this will require you to replace the alternator.
TURN ON LOADS
PRESS ENTER
RUN ENGINE UP TO
2500RPM 15 SEC
RIPPLE DETECTED
xx.xx V NORMAL
NO RIPPLE DETECT
PRESS ENTER
RIPPLE DETECTED
xx.xx V HIGH
ALT. LOAD VOLTS
xx.xx V HIGH
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