Fluke J 39200 User manual

TOOL REQUIRED:
J 39200 Digital Multimeter or equivalent
The following bench check may be used to simulate operation on a vehicle. Use the
bench check to verify operation of a CS-144 generator that has been repaired.
1. Mount generator in suitable test stand according to test stand manufacturer's
instructions. Test stand must be capable of driving generator at 6,500 RPM.
Generator Bench Check
2. Make connections as shown in Figure above. Be sure carbon pile is turned off.
Ground polarity of generator and battery must be same. Battery must be fully
charged. Use a 30-500 ohm resistor between battery and "L" terminal of
generator.
3. Slowly increase generator speed and observe voltage using J 39200. Important
•The battery must be fully charged when making this test.
•The engine must be run at 2500 RPM and at ambient temperature.

4. If voltage is uncontrolled and increases above 16 volts , repair or replace
generator.
5. If voltage is below 16 volts, increase speed and connect and adjust carbon pile to
obtain maximum amperage output. Maintain voltage above 13 volts.
6. Use ammeter to check amperage. If output is within 15 amps of rated output,
generator is good.
7. If output is not within 15 amps of rated output, repair or replace generator.