An electric watthour meter measures the electricity that the devices of your home or business use in watts per hour. You can read the meter's output on its center display and reset it often to see how much electricity you are using over a specific period of time. Adjusting the meter is crucial if you want to get accurate readings from it. Calibrate the meter by turning its adjusting screws with a micrometer screwdriver.
Locate the micrometer adjusting screws on the meter. The full load screw is typically in the right corner of the display plate and the light load screw is usually below the display on the right side.
Slow the meter's counting speed down by gently turning both screws in a clockwise direction with the micrometer screwdriver. Turn both screws counterclockwise to speed up the meter's counting speed.
Check the meter periodically to see if the readings are calibrating to the speed you adjusted them to. If necessary, readjust the screws with the micrometer screwdriver to calibrate the readings to your desires.