ISO 11452-4 Road Vehicles - Component Test Methods for Electrical Disturbances from Electromagnetic Energy - Part 4: Equipment Excitation Methods

Automotive Tests

ISO 11452-4 Road Vehicles - Component Test Methods for Electrical Disturbances from Electromagnetic Energy - Part 4: Equipment Excitation Methods

EUROLAB laboratory provides testing and compliance services within the scope of ISO 11452-4 standard. Developed by the International Organization for Standardization (ISO), this part of the ISO 11452 standard specifies harness excitation test methods and procedures for determining the immunity of electronic components of passenger cars and commercial vehicles, regardless of the propulsion system (e.g. spark ignition engine, diesel engine, electric motor).

ISO 11452-4 Road Vehicles - Component Test Methods for Electrical Disturbances from Electromagnetic Energy - Part 4: Equipment Excitation Methods

The bulk current injection (BCI) test method is based on the injection of current into the harness using a current probe as a transformer, where the harness forms the secondary winding.

The tubular wave coupler (TWC) test method is based on a wave coupling to the wire harness using the directional coupler principle. The TWC test method was developed for immunity testing of automotive components based on radiated disturbances in the GHz ranges (GSM bands, UMTS, ISM 2,4 GHz). It is best suited for the small (in terms of wavelength) and under test (DUT) shielded device, since in these cases the predominant connection mechanism is via the harness.

The electromagnetic disturbances discussed in this document are limited to continuous narrowband electromagnetic fields.

Bulk current injection (BCI) is a method of performing immunity tests by sending disruptive signals directly into the harness via a current injection probe. The injection probe is a current transformer through which the harnesses of the device under test (DUT) are passed. Immune tests are performed by varying the test severity level and frequency of the induced disturbance.

Stimulation and Monitoring of the DUT

The DUT should be operated as required in the test plan by actuators that have minimal impact on electromagnetic properties, eg plastic blocks on buttons, pneumatic actuators with plastic tubing.

Connections to equipment monitoring the electromagnetic interference reactions of the DUT can be made using fiber optic or high resistance cables. Other types of lead can be used, but extreme care must be taken to minimize interactions. The orientation, length and location of such leads should be carefully documented to ensure repeatability of test results.

Any electrical connection of monitoring equipment to the DUT can cause the DUT to malfunction. Extreme care must be taken to avoid such an effect.

Among the services provided by our organization within the framework of material testing services, there are also ISO 11452-4 standard tests. Do not hesitate to contact our laboratory EUROLAB for your testing and certification requests.

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