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Model 88 V
Users Manual
44
Testing Ripple Voltage on an Alternator
Ripple voltage or ac voltage can be measured by
switching your meter to ac and connecting the black lead
to a good ground and the red lead to the “BAT” terminal
on the back of the alternator (not at the battery).
1. Insert the test leads as shown in Figure 13.
2. Set the rotary switch to
K.
3. Touch the red probe to the “BAT” side of the
alternator and the black probe to ground.
4. Read the display. A good alternator should measure
less than 0.5 V ac with the engine running. A higher
reading indicates damaged alternator diodes.
1.888.610.7664 sales@GlobalTestSupply.com
Fluke-Direct.com
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