SLVUE37 October   2026

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 System Description
      1. 1.3.1 Key System Specifications
      2. 1.3.2 End Equipment
      3. 1.3.3 Electricity Meter
      4. 1.3.4 Power Quality Meter, Power Quality Analyzer
    4. 1.4 Device Information
  8. 2Hardware
    1. 2.1 System Overview
      1. 2.1.1 Block Diagram
      2. 2.1.2 Design Considerations
        1. 2.1.2.1 Voltage Measurement - Analog Front End
        2. 2.1.2.2 Current Measurement - Analog Front End
        3. 2.1.2.3 Input Voltage
        4. 2.1.2.4 XDS110 Emulator
        5. 2.1.2.5 Magnetic Tamper Detection With TMAG5273 Linear 3D Hall-Effect Sensor (Not Populated on EVM)
  9. 3Software
    1. 3.1 Metrology Overview
      1. 3.1.1 Metrology Formulas
      2. 3.1.2 UART for PC GUI Communication
      3. 3.1.3 Direct Memory Access (DMA)
      4. 3.1.4 ADC Setup
      5. 3.1.5 Foreground Process
      6. 3.1.6 Background Process
      7. 3.1.7 Software Function per_sample_dsp ()
      8. 3.1.8 Frequency Measurement and Cycle Tracking
      9. 3.1.9 LED Pulse Generation
  10. 4Implementation Results
    1. 4.1 Evaluation Procedure
      1. 4.1.1 Equipment Setup
        1. 4.1.1.1 Jumper Settings for LED and UART
        2. 4.1.1.2 Power Supply Options and Jumper Settings
      2. 4.1.2 Test Procedure
        1. 4.1.2.1 Working With the Metrology GUI
        2. 4.1.2.2 Calibration
          1. 4.1.2.2.1 Voltage and Current Offset Calibration
          2. 4.1.2.2.2 Voltage and Current Gain Calibration
          3. 4.1.2.2.3 Active Power Gain Calibration
          4. 4.1.2.2.4 Offset Calibration
          5. 4.1.2.2.5 Phase Calibration
    2. 4.2 Performance Data and Results
      1. 4.2.1 Electricity Meter Metrology Accuracy Results
      2. 4.2.2 Radiated Emissions Performance
        1. 4.2.2.1 EMI Mitigation Recommendations
  11. 5Hardware Design Files
    1. 5.1 Schematics
    2. 5.2 PCB Layouts
    3. 5.3 Bill of Materials (BOM)
  12. 6Additional Information
    1. 6.1 Trademarks
  13. 7Tools and Software
  14. 8Related Documentation

4.2 Performance Data and Results

To test for metrology accuracy in the electricity meter configuration, a source generator is used to provide the voltages and currents to AMC-ADC-3PH-EVM. In this design, a nominal voltage of 120V between the three phases and neutral, calibration current of 10A, and nominal frequency of 60Hz are used for each of the three phases, while phase calibration is done at 60°.

In the cumulative active and reactive energy testing, the sum of the energy reading of each phase is tested for accuracy. For cumulative active energy error and cumulative reactive energy error testing, current is varied from 100mA to 100A. For cumulative active energy, a phase shift of 0° (PF = 1), PF = 0.5i (inductive), and PF = 0.8c (capacitive) is applied between the voltage and current waveforms fed to the reference design. Based on the error from the active energy output pulse, a plot of active energy % error versus current is created for the three PF values.

For cumulative reactive energy error testing, a similar process is followed except that a phase shift of 90° (sin ϕ = 1i), sin ϕ = 0.5i (inductive), and sin ϕ = 0.8c (capacitive) are used, and cumulative reactive energy error is plotted.

All these tests are run using the 4ksps sample rate setting of the AMC131M03.

For the VRMS accuracy test on Phase A, the voltage is varied from 10V to 270V while current is held steady at 10A. For the IRMS accuracy test on Phase A, the voltage is kept steady at 120V, while current is varied from 0.025A to 100A.

The following two plots for Active and Reactive Power are per IEC 62053-22 limits for class 0.2S and 0.5S accuracy, assuming Inominal = 15A; hence, the 5% point of Inominal is at 750mA.

The average error for each measurement is calculated from five test series, taken sequentially for each current value, and the maximum deviation from these five measurements is calculated (not shown in the following plots) to confirm the stability of this metrology subsystem being below 10% of the maximum error allowed.

For the following test results, gain, phase, and offset calibration are applied to the meter. At higher currents, the % error shown is dominated by shunt resistance drift caused by the increased heat generated at high currents.

The test data are recorded with calibrated value data of:

  • V_in = 120V
  • I_in = 10A
  • Phase calibrated at 60°
  • Phases = 3
  • Energy Pulses for ACT and REACT = 6400
  • Room temperature