VOLTMETER
The PBT-50 can function as a voltmeter with a range of 8 to 19.0
volts. For an accurate live voltage measurement, the battery must
be good and fully charged.
1. Connect the tester clamps to the battery: red to the positive(+)
terminal, black to the negative (–) terminal. Rock each clamp
back and forth to make a good connection.
2. Press the
VV
VV
V button to read the live voltage.
3. Start the engine.
4. Read the voltage while the engine is running.
Result
VV
VV
Volts reading is between 13.5 volts and 14.8 volts
= Charging System OK
VV
VV
Volts reading is greater than 14.8 volts
= Charging System Problem.
Check regulator.
VV
VV
Volts reading is less than 13.5 volts
= Charging System Problem.
Check connections, wiring, and alternator.
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