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Aug 22,2024To meet the MID (Measuring Instruments Directive) standards in the European Union, a MID energy meter must undergo several processes to ensure it complies with legal metrology requirements. Here are the key processes typically involved:
Type Examination: The energy meter undergoes a type examination by a notified body or a designated authority. This examination verifies that the meter design meets the essential requirements of the MID, including accuracy, reliability, and conformity to specified technical specifications.
Initial Verification: After type examination, the manufacturer or their authorized representative performs an initial verification of the meter. This involves testing a prototype or sample unit to ensure it meets the type-approved specifications and complies with the MID requirements.
Quality Assurance System: Manufacturers must establish and maintain a quality assurance system that ensures the consistency of production processes and the conformity of each meter produced with the type-approved design. This system is audited by notified bodies to verify compliance.
Marking and Conformity Assessment: Once verified and approved, the MID energy meter is marked with the CE (Conformité Européenne) marking, indicating conformity with the MID requirements. The CE marking signifies that the meter can be legally placed on the market within the EU.
Periodic Reverification: Periodically, MID energy meters in service must undergo reverification to ensure ongoing accuracy and compliance with legal metrology standards. This periodic reverification frequency is specified based on the meter type and its designated use.
Traceability and Documentation: Throughout the process, traceability of measurements, calibration records, and documentation demonstrating compliance with MID requirements are essential. Manufacturers maintain records that can be audited by authorities to ensure continued compliance.
Market Surveillance: Regulatory authorities conduct market surveillance activities to verify that MID energy meters placed on the market continue to meet legal requirements. This includes testing meters randomly sampled from the market to ensure they perform accurately and meet specified standards.
These processes ensure that MID energy meters provide reliable and accurate measurements of electrical energy consumption, contributing to fair trade and consumer protection within the European Union market.
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