matson BT900 - CHARGING SYSTEM WITH ACCESSORY LOADS; DIESEL ENGINE TEST SPECIFICS; DETECTING CHARGING SYSTEM RIPPLE

DIGITAL BATTERY TESTER
BT90014 |
SYSTEM TEST
RIPPLE DETECTED
xx.xx V NORMAL
NO RIPPLE DETECT
PRESS ENTER
RIPPLE DETECTED
xx.xx V HIGH
TURN ON LOADS
PRESS ENTER
RUN ENGINE UP TO 2500RPM
15 SEC
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.