Abstract: An intelligent electronic device, and in particular, an electrical power meter, includes an internal calibration system capable of calibrating its measurement mechanisms for the integral nonlinearities introduced by the components which make up those mechanisms, in particular, the analog-to-digital converter. The analog-to-digital converter is coupled with at least one sensor which is operable to sense electrical energy in one or more conductors and output a corresponding electrical signal indicative thereof, the analog-to-digital converter being operative to convert the electrical signal output by the sensor to at least one corresponding digital signal. Integral non-linearity describes the deviation between the ideal output of an analog-to-digital converter and the actual output (after offset and gain errors have been removed).

Abstract: An intelligent electronic device, and in particular, an electrical power meter, featuring an internal calibration system capable of calibrating its measurement mechanisms for the integral nonlinearities introduced by the components which make up those mechanisms, in particular, the analog-to-digital converter, is disclosed. The analog-to-digital converter is coupled with at least one sensor which is operable to sense electrical energy in one or more conductors and output a corresponding electrical signal indicative thereof, the analog-to-digital converter being operative to convert the electrical signal output by the sensor to at least one corresponding digital signal. Integral non-linearity (“INL”) is a term describing the deviation between the ideal output of an analog-to-digital converter and the actual output (after offset and gain errors have been removed).

Abstract: A power meter for measuring power parameters on one or more electrical power lines/loads is configured to include a revenue class metering module and a power quality metering module. The revenue class metering module and the power quality metering module may use the same measured voltage and current signals to generate revenue accurate power consumption information and power quality information, respectively. The power meter may also include a plurality of filters configured to attenuate high frequency signals included in the voltage and current signals. Each of the filters may be configured with a corner frequency, gain and signal propagation delay that is substantially equal. The filtered current and voltage signals may be received and processed by the revenue class metering module, and the power quality metering module to generate revenue accurate power consumption information and power quality information, respectively.