Analog Devices AN-950 ADE71xx/ADE75xx Meter Calibration Guide

About this manual

This application note describes the calibration procedures for ADE71xx/ADE75xx series single-phase energy meters. The first part details the calculation of constants required for active power, RMS current/voltage, apparent power, and reactive power calibration, including examples using a reference meter or precise source.

The second part outlines how to use LabVIEW™ calibration software designed specifically for interaction with ADE71xx/ADE75xx reference designs. It covers determining the isolated COM port, downloading firmware, accessing EEPROM calibration constants, and performing power and RMS calibrations via the software interface.

What's inside

• Introduction
• Calibration Methods
• Active Power Calibration
• RMS Current and Voltage
• Apparent Power Calibration
• Reactive Power Calibration
• Using Precise Sources
• Real-Time Clock Calibration
• ADE71xx/ADE75xx Calibration Software
• Power Theft Prevention

Frequently asked questions

What is the purpose of the calibration procedure described in this guide?

The guide explains how to calibrate ADE71xx/ADE75xx meters to remove differences caused by external components or internal reference voltage sources.

What specific input conditions are used in the example for calculating the expected CF output frequency?

The example calculates the frequency based on a load of 220 V and 10 A with a power factor of 1.

What input current level is applied to perform the power offset calibration?

To correct for offset, a small input current signal of 100 mA must be applied.