A meter device for measuring electrical energy is provided. The meter
device includes circuitry for measuring at least one parameter of
electrical energy provided to the meter device. A storage device is
provided for storing at least one calibration factor for compensating for
errors associated with at least one of at least one external current
transformer (CT) and at least one external potential transformer (PT)
that operates on the electrical energy provided to the meter device. At
least one processor is provided for processing the at least one
calibration factor for adjusting the measuring for compensating for the
errors when measuring the at least one parameter of electrical energy.