Gxt V044-01, Ferret 44 Battery Tester with Printer Man Manuel d'utilisateur télécharger pdf (Page 10)

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Alternator Output Test (Manual)

Al ways compare test results with manufacturerʼs speciﬁ cations before coming to conclusions regarding the

performance or efﬁ ciency of charg ing systems and their components.

1. Be sure the Load Knob is turned to OFF before

connecting the analyzer cables to the battery. Take

note of the safety pre cau tions on the back cover of

this manual.

2. Connect the analyzer Battery Clamps to the battery

terminals; Red to positive, Black to neg a tive.

3. With the Amp Probe jaws closed and not around any

wires, press the Zero Amps but tons until the Amps

Display shows “000”

4. Place the Amp Probe around the al ter na tor output

wire. Try to po si tion the probe away from strong

magnetism near the back shaft end of the al ter na tor

to avoid mea sure ment error.

5. Press the Amps/Volts button

6. Start and run the engine at about 2000 RPM.

7. Turn the Load ON and increase until the battery voltage

decreases to be between 12 and 13 volts while reading the output amperage.

8. Turn Load OFF and reduce RPM.

9. Test Conclusions

If the Amps Ripple lamp stayed on during the output test replace the al ter na tor.

If the amperage abruptly decreased during the test check for a loose belt.

If output was less than 90% of rating use the voltage drop test to check output resistance.

If output did not change, full ﬁ eld the alternator. If the alternator output increases, replace the regulator.

Regulator Charging Voltage Test

Follow the same setup and test procedure used for the alternator test, except put the Amp Probe around either

battery cable. Once the charging amperage drops below 20 amps, the voltage displayed will be the regulator

setting. This should be between 13.5 and 15.5 volts on a 12 volt system.

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Gxt V044-01, Ferret 44 Battery Tester with Printer Man Manuel d'utilisateur Page 10