How to Test an Electric Generator

Electrical generators are used for a variety of reasons, but generally, they are used in areas where the electrical supply is limited or unreliable. Firing up a generator will create the energy needed (when sized correctly) to run home appliances and lights. Emergency generators are used for buildings that require a back up electrical system in case of power failure. Testing the generator regularly is essential in preventing complete power failures when the electricity to your home or building is cut.

Gas
Oil
Voltmeter

Instructions

- 1
  Check the generator for proper fuel levels before beginning the test. Fuel should be checked every week.
- 2
  Remove the dip stick from the generator. Wipe the oil from the stick and dip it back into the crankcase. Check the oil level on the dip stick and fill with the oil specified in the owner's manual.
- 3
  Check that the battery terminals are hooked up to the positive and negative line.
- 4
  Disconnect the generator from the regulator that powers the home or device hooked up to the generator.
- 5
  Connect a jumper cable to the DF connection on the generator. Hook the other end of the jumper cable to the frame.
- 6
  Set a voltmeter to the voltage setting (ohm) and touch it to the D+ terminal.
- 7
  Turn on the engine of the generator and increase the engine speed. You should read 35 volts at 3000 RPM. If not, have the generator professionally serviced.

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