Design for EMC

Design for electromagnetic compatibility (EMC) must be a top priority from the very beginning of the meter
design cycle. Routine EMC/EMI tests for metering products typically include:
•  Conducted and Radiated Emissions tests
•  RF Immunity tests with and without load
•  Electrostatic Discharge (ESD) tests
•  Electrical Fast transient (EFT) tests 
Successfully passing these tests depends on many factors, including:
•  Schematic design and component selection
•  Printed circuit board (PCB) topology, component placement, PCB design
•  Input connections and wiring of the sensing elements to the meter
•  Firmware code
The methods presented in this document are incorporated into the TERIDIAN Demo Boards, enhancing
EMI compatibility without affecting accuracy performance of the meter. 
Following the recommendations outlined in this document in the initial phase of schematic and PCB
design helps generating EMI/EMC compliant designs up front, avoiding potential rework of PCBs.
Note: Reference designators are given in a generalized form and do not necessarily relate to the
reference designators used on actual TERIDIAN Demo Boards.