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EUProcess Guide

# How to Prepare Your Product for CE Testing

Complete guide to preparing for CE testing. Learn about pre-test checklists, sample preparation, documentation requirements, and how to avoid common testing delays.

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At a glance

Checklist categories

4

Tips

5

FAQs

5

## Preparation checklist

### Product samples

2-3 production-representative samples, all accessories and cables, user manual draft, power supplies

### Documentation

Product description, block diagram, BOM with component values, schematic diagrams, PCB layout

### Software/firmware

Latest firmware version, firmware update instructions, description of operational modes

### Test mode

Instructions for putting product into test mode, any special test fixtures or cables needed

## Tips for smooth testing

*   Use production-representative samples — prototypes may differ from final production
*   Ensure firmware is finalized before testing — firmware changes may require re-testing
*   Provide complete documentation upfront — missing information causes delays
*   Communicate with the lab before testing — clarify test scope and requirements
*   Plan for sample destruction — some tests may damage samples

## Frequently Asked Questions

### How many samples do I need for testing?

Most labs require 2-3 samples. One may be used for destructive testing like dielectric strength. Having multiple samples allows parallel testing and provides spares if one fails during testing.

### What documentation should I bring to the lab?

Bring product description, block diagram, BOM, schematics, PCB layout, user manual draft, and firmware documentation. Complete documentation reduces back-and-forth and prevents delays.

### Can I make changes during testing?

Minor adjustments like cable positioning or test mode selection are usually allowed. However, hardware or firmware changes during testing typically invalidate the test and require re-testing. Finalize your design before formal testing.

### How long does preparation typically take?

Plan 1-2 weeks for preparation. This includes gathering documentation, preparing samples, creating test fixtures if needed, and coordinating with the laboratory. Rush preparation increases risk of missing items or documentation.

### What if my product isn't ready for testing?

Consider pre-compliance testing instead. Pre-compliance can identify issues with development samples without the cost and formality of full certification. Use pre-compliance results to refine the design before formal testing.

**Disclaimer:** This page is an educational resource based on official EU sources. It is not legal or engineering advice. Always verify current directive and standard status in the Official Journal before placing any product on the EU market.

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