One has to be very careful when setting up and performing the Megger test. If one applies too much voltage, for example, it would be possible to destroy the piece of equipment that you are testing. You will connect the output terminals to the device being tested and then turn on the device. Make sure that you are testing at the right current and make sure that you are on the maintained output mode of the tester. Select the continuous ammeter mode, and then you will be able to start gauging the results of your test. The tests are usually performed over a period of about 5 to 10 minutes at 30-second intervals, and one has to record the results each minute. Finally, you will compare the results.