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CISPR 12 EMC Testing of Vehicles, Boats, and Internal Combustion Engines

CISPR 12 EMC Lab Testing of Vehicles, Boats, and Internal Combustion Engines

As a leader in EMC regulatory compliance testing, Keystone assists electronic equipment manufacturers with EMC compliance testing. Meeting the IEC, FCC, and other EMC testing requirements can be challenging. Not only do we understand the challenges, but we help guide companies through the process.

Keystone’s EMC testing engineers streamline the process and assist companies to achieve the compliance they require. We have a strong reputation of helping customers achieve their EMC product certifications. Furthermore, our consultative approach and free product troubleshooting allow customers to spend more time focusing on R&D rather than EMC regulatory compliance.

Request a quote to receive expert EMC regulatory compliance testing services tailored to your specific needs. Contact us to discuss your product and how we can assist you in achieving CISPR 12 and FCC certifications.

Summary of CISPR 12 Electromagnetic Compatibility Compliance Testing

CISPR 12 compliance testing provides protection for broadcast receivers in the frequency range of 30 MHz to 1000 MHz when used in the residential environment. Compliance with this standard may not provide protection for new types of radio transmissions or receivers used in the residential environment nearer than 10 m to the vehicle or device.

This regulatory compliance EMC/EMI standard applies to the emission of electromagnetic energy which may cause interference to radio reception and is emitted from:

  • Vehicles/boats propelled by an internal combustion engine, electrical means, or both;
  • Devices Equipped with internal combustion engines or traction batteries.

The measurement of electromagnetic disturbances, while the vehicle is connected to power mains for charging, is not covered by this standard. In the case of a duel-mode trolly bus, the internal combustion propulsion system is included, but the a.c./d.c. mains portion of the vehicle is excluded. Additionally, CISPR 12 does not apply to the following:

  • Aircrafts
  • Household appliances
  • Traction systems (railway, tramway, and electric trolly buses)
  • Incomplete vehicles.

Scope of the CISPR 12 Standard Test Method

In the 30 MHz – 1 GHz frequency range, the vehicle/boat/device must comply with:

  • Average limits when the unit is in “Key-On, Engine-Off” mode;
  • Peak or quasi-peak limits when the unit is in “Engine-Running” mode.

Pertaining to the methods of measurement, the instrument being used must comply with CISPR 16. Either manual or automatic frequency scanning can be used. When quasi-peak limits are used and a peak detector is used for time efficiency, any peak measurements with results at or above the test limit are re-measured using a quasi-peak detector.

Measurements are made while the units being tested are dry or 10 minutes after precipitation has stopped falling. For outboard engines or propulsion motors, all surfaces normally in contact with the water while in use are exempt from the dryness criteria.

For vehicles and boats, all equipment that is automatically switched on together with the propulsion system is measured while operating. Additionally, the engine must be at a normal operating temperature. CISPR 12 also states that for vehicles or boats with independent electric and internal combustion systems, propulsion systems are tested separately.

CISPR 12 EMC Testing Laboratory

In addition to CISPR 12 electromagnetic compatibility testing, Keystone has a full scope of expertise including environmental and package testing such as cold chain, ingress protection, and vibration. We have a full lab of test equipment which permits us to provide short lead times on scheduling.

If you are ready to start your vehicle and internal combustion EMC testing, please request a quote. For more information on why so many companies partner with Keystone Compliance, contact us.


For more information on CISPR electromagnetic compatibility certification testing, please visit the links below.