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For an EMC Directive apparatus route, the technical documentation should identify the product covered, describe the apparatus, include drawings or schemes needed to understand the design, list harmonised standards applied and test results, and explain any non-harmonised or partial-standard route used to meet the essential requirements. If Annex III EU-type examination is used, the EU-type examination certificate belongs in the file.

The EU declaration of conformity should identify the apparatus, manufacturer or authorised representative, Union harmonisation legislation, dated harmonised standards or other technical specifications, notified-body information where applicable, and the signer. Where more than one Union act requires a declaration, the EMC Directive allows a single EU declaration covering all relevant Union acts.

Do not reduce the assessment to a pass/fail test report for the radio module. The EMC assessment should cover relevant emission and immunity phenomena for the final apparatus, its intended use, installation conditions, foreseeable configurations, and electromagnetic environment. Harmonised standards can give presumption of conformity only for the essential requirements and phenomena they cover.

If a harmonised standard is not applied, is applied only in part, or a test is omitted because the manufacturer relies on design precautions, comparison with similar apparatus, physical characteristics, calculations, or other evidence, the technical documentation should explain the deviation and how the essential requirements are still met. For integrated modules, that explanation is where host-specific assumptions belong.

Article 9 of Directive 2014/30/EU puts the importer gate before market placement. The importer must ensure that the apparatus is within the EMC Directive apparatus regime, that the manufacturer has carried out the Article 14 conformity assessment, that technical documentation exists, that the CE marking is present, and that the apparatus is accompanied by the required documents.

The importer must also check the manufacturer's traceability information: type, batch, serial number or another product identifier, plus the manufacturer's name, registered trade name or registered trade mark, and postal contact address. The importer's own name, registered trade name or registered trade mark and postal address must also appear on the apparatus, or where that is not possible, on packaging or in an accompanying document. Importer details must not obscure the manufacturer's information.

If the importer considers or has reason to believe that the apparatus is not in conformity with the EMC essential requirements, it must stop the market-placement decision. The apparatus must not be placed on the market until it has been brought into conformity, and if it presents a risk the importer must inform the manufacturer and market surveillance authorities.

The core evidence links the physical apparatus to the EU declaration of conformity and technical documentation. A generic supplier statement does not establish that link. The EMC Guide explains that technical documentation should identify the product and allow an unambiguous link between the technical file, the EU declaration of conformity, and the product.

For the EU declaration of conformity, the EMC Guide describes a model structure covering the apparatus model or product identification, manufacturer or authorised representative name and address, the statement that the declaration is issued under the sole responsibility of the manufacturer, the relevant Union harmonisation legislation, harmonised standards or other technical specifications used, notified-body information where applicable, and signature details.

The importer must also verify that instructions and Article 18 information accompany the apparatus in a language easily understood by consumers and other end-users in the relevant Member State. For EMC, use information includes specific precautions for assembly, installation, maintenance, or use where those precautions are needed to keep the apparatus compliant when put into service.

Importer duties continue while the apparatus is under the importer's responsibility and after placement. Storage or transport conditions must not jeopardise compliance with the EMC essential requirements. That matters for products whose EMC performance depends on intact shielding, cabling, accessories, configuration, packaging, or installation information.

If the importer later considers or has reason to believe that apparatus it placed on the market is not in conformity, the Directive requires immediate corrective measures to bring the apparatus into conformity, withdraw it, or recall it if appropriate. If the apparatus presents a risk, competent national authorities in the affected Member States must be informed with details of the non-compliance and corrective measures.

When appropriate in view of the risks, importers must also carry out sample testing, investigate complaints, and, if necessary, keep a register of complaints, non-conforming apparatus, and recalls while keeping distributors informed. On a reasoned request from a competent national authority, the importer must provide information and documentation needed to demonstrate conformity, in paper or electronic form and in a language easily understood by that authority. The importer must also cooperate with the authority on action taken to eliminate risks posed by apparatus it placed on the market.

The EMC Directive requires equipment to meet the essential requirements in Annex I. For apparatus, conformity assessment must demonstrate that generated electromagnetic disturbance does not exceed the level above which radio, telecommunications, or other equipment cannot operate as intended, and that the apparatus has adequate immunity for its intended use.

A failed emission or immunity test therefore means the tested configuration has not demonstrated the relevant part of the essential requirements. It may still be possible to show conformity after redesign, a justified technical change, a corrected installation condition, a different representative configuration, or a properly documented standards route, but the failed result must be addressed rather than buried.

Treat a post-market failure as a conformity investigation, not only a laboratory task. Determine which models, revisions, batches, configurations, accessories, and Member State markets may be affected. A failed sample does not by itself establish that every unit is non-compliant, but the manufacturer cannot ignore evidence that apparatus it placed on the market may no longer conform.

If the manufacturer considers or has reason to believe that apparatus it placed on the market is not in conformity, Article 7 requires immediate corrective measures to bring it into conformity, withdraw it, or recall it if appropriate. Where the apparatus presents a risk, the manufacturer must inform the competent national authorities in the Member States where it made the apparatus available and give details of the non-compliance and corrective measures. Importers have parallel duties for apparatus they placed on the market.

Start with a controlled failure record, not a rewritten pass narrative. Preserve the failed test report, lab observations, plots, limits, setup photos, operating modes, cable routing, auxiliary equipment, and deviations from the planned test method. Then identify whether the failure is caused by the product design, the representative configuration, production variation, installation conditions, or an incorrect standard or test setup.

Remediation should be technical enough to explain why the corrected configuration now meets the relevant phenomenon. Typical records include changes to filtering, shielding, source support, PCB layout, enclosure bonding, firmware operating modes, clocking, cable selection, power supply, installation instructions, or component specification. If the product is a fixed installation issue rather than apparatus, document the good engineering practice and component intended-use information that support the installation correction.

Update the technical documentation before release. The record should show the failed result, what changed, why the change addresses the emission or immunity issue, what standard or technical specification now supports the claim, and whether the change affects other Union legislation listed on the same EU declaration of conformity.

For harmonised standards, check that the reference is one published for the EMC Directive and that the product still falls within the standard's scope, limits, test methods, and Annex ZZ mapping. If a standard was superseded, part-applied, or deviated from, record the date and scope of the standard used, the parts applied, the deviation, and the additional evidence used to cover the essential requirements. Do not sign or update the EU declaration of conformity for the affected model until the evidence supports the statement that the essential requirements have been demonstrated.

The retest should prove the same risk has been closed, not merely that a different sample passed a different setup. Match the retest to the failed phenomenon, the corrected configuration, and the intended operating conditions. Where the apparatus has multiple representative configurations, retain the rationale for the worst-case configuration and explain why untested configurations remain covered.

Keep the retest package readable for a market-surveillance request: final sample identification, version-controlled design changes, test plan, lab report, applied standards and dates, deviations or alternative specifications, photographs or diagrams of the setup, measured results against limits or criteria, and an approval note that connects the retest to the EU declaration of conformity.

Reassess the product when a change can affect the electromagnetic compatibility conclusion already documented for the apparatus. Examples include changes to circuit design, power supply, shielding, enclosure, source support, filters, ports, cables, installation conditions, firmware behavior that affects emissions or immunity, operating configuration, or the intended electromagnetic environment.

Directive 2014/30/EU requires manufacturers to take changes in apparatus design or characteristics, and changes in the harmonised standards or technical specifications used for the declaration, adequately into account. The EMC assessment must also cover normal intended operating conditions and the configurations the manufacturer identifies as representative of intended use.

If the existing assessment relied on harmonised standards, a standards change does not automatically require a complete retest. The Commission EMC Guide says the evaluation may be limited to modifications directly affecting the apparatus, but the manufacturer must evaluate whether the newer standard, clause, phenomenon, or scope change affects the product and may consider re-testing.

The original manufacturer remains responsible for apparatus it places on the market, including the conformity assessment, technical documentation, EU declaration of conformity, and CE marking. But the Directive also says an importer or distributor is treated as the manufacturer when it places apparatus on the market under its own name or trade mark, or modifies apparatus already placed on the market in a way that may affect compliance.

That matters for private-labeling, refurbishment, retrofit kits, field upgrades, local power-supply substitutions, enclosure changes, and software or accessory packages sold as a changed product. The company making or commissioning the compliance-affecting modification should not assume the original manufacturer, test lab, supplier, or notified body carries the updated conformity responsibility. A like-for-like repair does not automatically create a new product; the Blue Guide distinguishes ordinary repair or maintenance from an important change or overhaul that modifies original performance, purpose, or type.

Importers also have their own gatekeeping role: before placing apparatus on the market, they must ensure that the manufacturer carried out the appropriate conformity assessment, drew up technical documentation, applied CE marking, and supplied required documents. If the importer has reason to believe the modified apparatus does not conform, it must not place it on the market until it is brought into conformity.

If the modification is covered by the existing assessment, the record should show why. If the modification changes the assessed apparatus, the EU declaration of conformity may need to be updated so it identifies the modified apparatus, the applicable Union acts, the standards or technical specifications applied, and any notified-body certificate information where applicable.

The CE marking is not a substitute for the reassessment. CE marking is affixed after the applicable conformity assessment has been completed. If the change creates a new product or invalidates the existing assessment basis, the modifier must complete the relevant conformity work before placing the modified apparatus on the market with CE marking.

If the product used the EU-type examination route and there is an EU-type examination certificate, modifications to the approved type that may affect conformity or certificate validity must be reported to the notified body holding the technical documentation. The Directive requires additional approval as an addition to the original certificate for those modifications.

A useful modification record lets a market-surveillance authority, importer, distributor, or customer understand whether the existing CE-marked product evidence still applies. It should connect the physical change to the EMC phenomena, standards, test configurations, and DoC entries that were reviewed.

For targeted re-testing, the record should explain why the selected tests, clauses, frequency ranges, configurations, or engineering comparisons are enough. For no-test decisions, the Commission EMC Guide says technical documentation should include explanations demonstrating how the essential requirements are met when tests are not performed under the manufacturer's responsibility.

For fixed-installation-specific apparatus, do not mix the apparatus exemption into ordinary product sales. The EMC Guide describes that exemption as tied to a particular fixed installation and a direct link between the manufacturer of that apparatus and the responsible installation parties.