I am trying to figure out how this handheld unit works for detecting power. I don't have a manual. I am disconnecting and removing electric baseboard heaters. I just want to figure out which fuse controls this power circuit. Even with all the breakers thrown my handheld AC Sensor gizmo seems to beep furiously as if there were power. I know there is not because when I turn the heater switches ON they do not heat up.
Can anyone tell me how to use this thing to determine if the power lines are live? (working intuitively - admitedly not a good idea with electricity - I hold the side button down and pass the unit over the leads. But it still beeps.)