ナレッジベース

試験&認証 ブログ

CE、FCC、電池試験、Amazonコンプライアンス、市場参入に関する実践的なガイドを、メーカー、輸出業者、Amazon販売者向けにご用意しています。一般的な理論は省き、適合製品を出荷するために必要なことだけをお伝えします。

認証の要件
2026-10-31  ·  読了時間 9分

Does an Accessory Sold Separately Need Its Own Test Report?

A charger that ships in the box and the same charger listed on its own are two different compliance cases. What evidence a separately sold accessory needs, and when the device report cannot be reused.

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After the Report
2026-10-30  ·  読了時間 10分

What If the Test Report Has the Wrong Model Number?

A model number that does not match the label can stop a shipment or a listing. What a laboratory can amend, what it cannot, and when a correction is pointless because the product really needs retesting.

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During Testing
2026-10-29  ·  読了時間 10分

EMC Class A or Class B: Which One Does My Product Need?

Class A and Class B differ by 10 dB of emissions and by which manual statement you have to print. How the class is decided, and what choosing the wrong one costs.

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Post-Market Issues
2026-10-28  ·  読了時間 9分

Does a Firmware Update Require Re-certification?

A firmware change only matters if it moved something that was measured. How FCC 2.1043 classes and the EU software-update test decide whether you retest, refile, or just record the version.

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書類&サンプル
2026-10-27  ·  読了時間 9分

Can My Factory Ship Test Samples Directly to the Laboratory?

Yes, and it is common. What matters is who is named on the waybill, the customs declaration and the packing list, and how the box connects to your test booking.

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Failure & Retesting
2026-10-26  ·  読了時間 10分

Is It a Product Problem or a Test Setup Problem?

A failed EMC test is a measurement of one configuration, not a verdict on your design. How to read the data and tell a product problem from a setup problem before you redesign.

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After the Report
2026-10-24  ·  読了時間 9分

Who Signs the Declaration of Conformity When You Use an ODM?

In ODM and private-label deals the Declaration of Conformity is signed by whoever markets the product under their own brand. How responsibility splits between brand, factory and importer, and what your ODM contract should say.

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Choosing a Laboratory
2026-10-23  ·  読了時間 10分

Can I Use a Chinese Laboratory Report for CE Marking?

EU law does not require CE testing in a European laboratory. What decides whether your Chinese test report is accepted: standard edition, accreditation scope, tested configuration, and the notified body exception.

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During Testing
2026-10-22  ·  読了時間 8分

What Is a Test Plan and Why Should You Approve It Before Testing Starts?

A test plan defines the configuration, modes, firmware and standards your product will be measured against. Here is what it contains, how to review it, and what goes wrong when it is never approved.

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After the Report
2026-10-21  ·  読了時間 10分

What Is a Technical File and Who Has to Keep It?

What goes into a CE technical file, how it differs from a test report, who has to keep it for 10 years, and what to do when nobody can find the file.

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Post-Market & Production Changes
2026-10-20  ·  読了時間 9分

Does Moving Production to a Different Factory Require Retesting?

A factory move does not automatically invalidate a test report. What decides a retest is the construction, plus which certification schemes actually name the factory.

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During Testing
2026-10-19  ·  読了時間 9分

How Does the Laboratory Decide Which Standard to Test Against?

Why two labs cite different standards for the same product: how the regulation, product family, ports, edition and the buyer's contract each decide the test standard.

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After the Report
2026-10-18  ·  読了時間 9分

What to Do When a Buyer Asks for a Certificate You Cannot Provide

When a buyer asks for a CE certificate that does not exist: which documents actually satisfy the request, which certificates really exist, and how to reply without losing the order.

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Choosing a Laboratory
2026-10-17  ·  読了時間 9分

Can I Use My Supplier's Test Report for My Own Product?

What to check before selling under your own brand with a factory test report: coverage of the shipped configuration, completeness of the report, and who signs the declaration of conformity.

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Post-Market Issues
2026-10-16  ·  読了時間 9分

A Customer Reports Interference After Sale - What Should I Do?

A customer says your product causes interference. What a passing report actually proves, the five configuration changes to check first, and when a regulator steps in.

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認証の要件
2026-10-15  ·  読了時間 8分

What Certifications Does My Product Need to Sell in Australia?

The RCM mark, ACMA EMC and radio rules, EESS electrical safety levels and the responsible supplier requirement - what Australia and New Zealand actually ask for before you ship.

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書類&サンプル
2026-10-14  ·  読了時間 8分

Do I Need to Send Accessories and Cables with My Test Samples?

Adapters, cables, antennas and batteries are part of the tested configuration. Which accessories to send, what a missing one costs you, and what to declare in writing.

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Choosing a Laboratory
2026-10-13  ·  読了時間 9分

What Is a Notified Body and When Does My Product Need One?

A notified body is a designated third-party assessor - required only in specific cases. When EU law forces one into your CE route, and when a test report is enough.

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Quotation & Scope
2026-10-12  ·  読了時間 8分

Is It Cheaper to Certify the Module or the Finished Product?

A pre-certified radio module is usually cheaper - but only if its approval covers your antenna and modes. What a module grant covers, what it leaves out.

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認証の要件
2026-10-11  ·  読了時間 7分

Does My Product Need UN38.3 Testing for the Lithium Battery?

UN38.3 is a transport test, not a market approval. When a lithium battery in your product needs it, and what the test summary your carrier asks for must contain.

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Failure & Retesting
2026-10-10  ·  読了時間 8分

What Is Pre-Compliance Testing and Is It Worth the Money?

Pre-compliance testing finds EMC and radio problems before the formal test. What it can and cannot prove, when it saves money, and when it is a wasted bench round.

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After the Report
2026-10-09  ·  読了時間 8分

Can One Test Report Cover Multiple Markets?

What a test report can and cannot do across markets - where measurements carry over to the US, UK or Korea, and where local approval routes stop reuse.

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Post-Market Issues
2026-10-08  ·  読了時間 8分

Can I Add Another Model to an Existing Test Report?

A test report covers the models it actually tested, not a whole series. Here is when a new variant can be added by amendment and when a delta test is unavoidable.

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During Testing
2026-10-07  ·  読了時間 8分

What Actually Happens During the Testing Process?

What a laboratory actually does between sample arrival and report: intake checks, worst-case selection, pre-scans, formal runs, and why mid-project questions are normal.

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After the Report
2026-10-06  ·  読了時間 9分

Test Report vs Certificate: What Is the Difference?

A test report records testing, a certificate is issued by a third party, and a declaration of conformity is signed by you. Which document your buyer is really asking for.

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書類&サンプル
2026-10-05  ·  読了時間 8分

Why Does the Laboratory Ask for My Label and Artwork?

The lab asks for your label artwork because the report describes one configuration and the label ships on every unit. What the artwork has to get right, and what turns into a retest.

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認証の要件
2026-10-02  ·  読了時間 8分

Do I Still Need UKCA Marking to Sell in the UK?

CE marking is recognised indefinitely in Great Britain, so most electronics do not need UKCA. Where UKCA still applies, what changed in October 2024, and how Northern Ireland differs.

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Post-Market & Changes
2026-10-01  ·  読了時間 9分

Does Changing a Component Require Retesting?

A component swap after certification does not automatically invalidate the report - but some changes do. Here is how to tell which changes need retesting, and what evidence closes the rest.

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Quotation & Scope
2026-09-30  ·  読了時間 8分

How Long Does Certification Testing Take?

Certification testing takes days to several weeks - but the bench is only one part of the clock. Here is where the calendar time actually goes, and what you control.

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After the Report
2026-09-29  ·  読了時間 8分

How Long Is a Test Report Valid?

A test report carries no legal expiry date. What decides whether an old report is still accepted: the standard edition it cites, the product it describes, and your buyer's own rules.

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Choosing a Laboratory
2026-09-28  ·  読了時間 8分

How to Choose a Testing Laboratory for Product Certification

Six checks before you commit to a laboratory: accreditation scope for your exact standard, who accepts the report, full-configuration coverage, and how changes are handled.

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Failure & Retesting
2026-09-27  ·  読了時間 8分

Why Do Products Fail EMC Testing?

The recurring root causes behind EMC test failures - power supply filtering, grounding, cables, enclosure shielding, clock layout and configuration drift - and which fixes actually clear the limit line.

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書類&サンプル
2026-09-26  ·  読了時間 8分

Can I Use Engineering Samples for Certification Testing?

Production tooling is not ready but the buyer wants the report. When engineering samples are acceptable for certification testing, when they are not, and which differences force a retest on the production version.

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お見積り
2026-09-25  ·  読了時間 7分

Why Did My Testing Cost Increase After the Project Started?

Samples are already at the laboratory and the quote is suddenly higher. The three real reasons testing costs grow mid-project, which ones are avoidable, and how to lock the scope before you start.

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認証の要件
2026-09-24  ·  読了時間 8分

製品にはFCC認証が必要か?

製品にFCC IDが必要か、SDoCだけでよいかは、無線送信機を内蔵しているかという1つの問いで決まります——2つのFCCルートの違いと、プロジェクトが誤りやすい箇所を解説します。

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Failure & Retesting
2026-09-23  ·  読了時間 8分

認証試験に不合格だった場合、何が起きるか?

試験項目の不合格は結果であって却下ではありません——ラボが伝えるべきこと、修正を決めるのは誰か、全件または部分再試験を引き起こすのは何か、そして不合格が報告書と適合宣言書に及ぼす影響を解説します。

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Quotation & Scope
2026-09-22  ·  読了時間 7分

なぜ試験ラボの見積りがこれほど異なるのか?

同じ製品、同じ規格、3つのラボ、3つのかなり異なる価格。その差の大部分はスコープです——各見積りが含んだものと静かに除外したもの。見積りを適切に比較する方法。

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認証の要件
2026-09-21  ·  読了時間 7分

米国向け製品に必要な認証は?

FCC機器認証、ULおよびNRTLのリスト化、DOEの電源規則、玩具要件——米国市場で法的に必須なのはどれか、そして買い手が要求するのはどれか。

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書類&サンプル
2026-09-20  ·  読了時間 7分

なぜラボは製品の取扱説明書を必要とするのか?

試験ラボが実際に取扱説明書から読み取る内容、試験報告書にそれが記載される理由、そして試験した版本と出荷する版本が異なった場合に何が起きるかを解説します。

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お見積り&試験範囲
2026-09-19  ·  読了時間 6分

製品試験のお見積りに含まれるものは?

試験のお見積りを解剖します:各明細の対象範囲、標準で含まれるもの、そして追加料金となる5つのケース——アダプターの変更、追加の無線モード、再試験——を解説します。

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認証の要件
2026-09-18  ·  読了時間 7分

Amazonで販売される電子機器に必要な認証は何ですか?

Amazonが電子機器の出品をフラグ付けした際に実際に求めるもの:試験報告書、FCCおよびCEの書類、責任者情報——そして回避すべき却下理由。

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書類&サンプル
2026-09-17  ·  読了時間 7分

試験ラボにはどのような書類を提出すればよいか?

試験開始前に試験ラボが必要とする書類——取扱説明書、BOM、回路図、ラベルデザイン、無線の詳細——各書類の用途と、欠けた場合に起きる問題を解説します。

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お見積り
2026-09-16  ·  読了時間 7分

CE試験の費用はいくらか?

CE試験に単一の価格はありません。CEのお見積りの各行が何に対する費用か、どの項目がコストを押し上げるか、そして契約後にプロジェクトでコストが追加される箇所をご確認ください。

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認証の要件
2026-09-15  ·  読了時間 7分

欧州で販売するために自社製品に必要な認証は何ですか?

欧州向け電子機器に関するCEマーキング、EMC、LVD、RED、RoHS、REACH、GPSRを解説——買い手やAmazonが実際に求める書類は何か。

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