EN 55022 Information Technology Equipment Emission Test
The EN 55022 standard is a crucial document within the broader framework of electromagnetic compatibility (EMC) testing, specifically designed for information technology equipment. This standard ensures that electronic devices do not emit excessive levels of radio frequency interference that could disrupt other electronic equipment or systems.
EN 55022 covers emissions from IT equipment operating in the frequency range of 150 kHz to 30 MHz, which encompasses both conducted and radiated emissions. Conducted emissions are those transmitted through cables and power lines, while radiated emissions are those that propagate through the air. Compliance with this standard is essential for ensuring interoperability between different electronic devices.
Understanding the context of military testing in electronics and communication can provide deeper insights into why adherence to EN 55022 is critical. In a military environment, where multiple electronic systems operate simultaneously, even small levels of interference could lead to significant operational disruptions. For instance, emissions from one piece of equipment might interfere with radar systems or command and control networks, leading to potential security threats.
The testing process involves several key steps. Initially, the IT equipment must be prepared according to specified guidelines outlined in EN 55022. This includes ensuring that all cables are properly terminated and that any external power supplies used during testing are correctly connected. Once the equipment is set up, it undergoes both conducted and radiated emission tests.
The conducted emissions test checks for interference along signal and power lines, while the radiated emissions test evaluates the electromagnetic signals emitted by the device itself. The results of these tests are then compared against the limits specified in EN 55022 to determine compliance.
| Parameter | Frequency Range (MHz) | Acceptance Criteria |
|---|---|---|
| Conducted Emissions | 150 kHz to 30 MHz | ≤2.5 dBm/12 kHz (per EN 55022) |
| Radiated Emissions | 8 MHz to 30 MHz | ≤41 dBuV/m (per EN 55022) |
To achieve accurate and reliable results, the testing laboratory must be equipped with state-of-the-art measurement instruments. These may include spectrum analyzers for evaluating radiated emissions and impedance matching networks to ensure proper signal transfer during conducted emission tests.
Compliance with EN 55022 not only ensures interoperability within military systems but also contributes to broader goals such as reducing electromagnetic pollution in urban environments. By adhering to this standard, manufacturers can help create a more robust and secure electronic ecosystem.
Applied Standards
- EN 55022: This European standard sets out the limits for conducted and radiated emissions from IT equipment. It is widely recognized as a benchmark for ensuring EMC in electronic devices.
- ISO/IEC 17025: Laboratories accredited to this standard must demonstrate their competence to perform tests and provide services according to specified requirements, which is crucial for the accuracy of EN 55022 compliance assessments.
The combination of these standards ensures that the testing process adheres to internationally recognized best practices. Compliance officers responsible for ensuring EMC in military applications should be familiar with both EN 55022 and ISO/IEC 17025 to maintain high-quality testing processes.
Scope and Methodology
- Test Setup: The IT equipment is placed in a special anechoic chamber designed to absorb radio waves, ensuring accurate measurements of radiated emissions.
- Data Collection: Measurements are taken using high-precision spectrum analyzers and data acquisition systems. Conducted emissions tests involve connecting the equipment directly to these devices via appropriate cables.
The methodology for conducting an EN 55022 test is outlined in detail within the standard itself, ensuring that all parties involved follow a consistent approach. This consistency is vital when comparing results between different laboratories or over time.
During the testing process, it is essential to account for various factors such as environmental conditions and the presence of other electronic devices. These variables can influence the emission levels measured, making accurate control of these elements critical for reliable test results.
Quality and Reliability Assurance
- Calibration: All measurement instruments used in EN 55022 testing are regularly calibrated to ensure accuracy. This includes periodic checks on spectrum analyzers, power meters, and other essential equipment.
- Data Validation: Multiple readings are taken during each test session to validate the initial results. Any discrepancies between these readings are investigated thoroughly before finalizing any reports.
The quality of our testing services is underpinned by a robust quality management system compliant with ISO/IEC 17025. This ensures that every aspect of the testing process, from initial setup to final report generation, meets the highest standards of accuracy and reliability.
Reliability assurance extends beyond individual test results; it encompasses long-term consistency across all services provided by our laboratory. Our commitment to continuous improvement guarantees that each client receives the best possible service every time.
