Austest adds Automotive EMC Immunity Standards for Vehicle mounted Devices

A

Austest Laboratories is proud to announce test capabilities for a suite of automotive based EMC standards.  These standards apply to vehicle mounted products and accessories under CE requirements and are listed below, along with a brief description of our capabilities:

ISO 11452-2:2004

This standard specifies an absorber-lined shielded enclosure method for testing the immunity of electronic components used in passenger cars and commercial vehicles to radiated electromagnetic RF fields. The device under test (DUT), together with the wiring harness, is subjected to an electromagnetic disturbance generated inside an absorber-lined shielded enclosure,

Austest Laboratories generates the following electromagnetic RF fields:

  • 100V/m, 80MHz to 1GHz
  • 75V/m, 1GHz to 2GHz
  • 10V/m, 2GHz to 3GHz.

AM and PM modulation available.

ISO 11452-3:2016

TEM Cel
TEM Cel

Specifies transverse electromagnetic (TEM) cell tests for determining the immunity of electronic components of passenger cars and commercial vehicles to electrical disturbances from narrowband radiated electromagnetic energy.

Under this standard, Austest Laboratories is capable of generating electromagnetic RF energy up to 100V/m between 1 and 200MHz, AM or PM modulation.

ISO 11452-4:2011

Specifies harness excitation test methods and procedures for determining the immunity of electronic components of passenger cars and commercial vehicles to induced RF currents.

Test methods include bulk current injection (BCI) and tubular wave coupler (TWC).

  • BCI method is used to couple RF energy 1MHz to 400MHz.
  • TWC method is used to couple RF energy 400MHz to 3GHz.

Austest Laboratories test facilities are capable of inducing RF currents into cabling as follows:

  • 100mA, 1MHz to 1GHz
  • 60mA, 1GHz to 3GHz

AM or PM modulation available.

ISO 11452-8:2015

Specifies tests for the immunity of electronic components for passenger cars and commercial vehicles, to magnetic fields. To perform this test, the device under test (DUT) is exposed to a magnetic disturbance field by either a radiating loop or Helmholtz coil.

The radiating loop method can be applied to small DUTs or to larger DUTs by positioning the coil in multiple locations. The Helmholtz coil is used as an alternative method.

Austest Laboratories is capable of generating the following magnetic fields as follows:

  • DC: 90A/m continuous and 900A/m for 3 seconds.
  • 15Hz to 1kHz: 30A/m continuous and 300A/m for 3 seconds
  • 1kHz to 10kHz: 30/(f/1000)²A/m continuous
  • 10kHz to 15kHz: 0.3 A/m continuous

ISO 16750-2:2012

Specifies the immunity to electrical loading that will be experienced by electronic components for passenger cars and commercial vehicles.

Austest Laboratories can generate the following for both 12 and 24V supplies:

Section 4.6.3 Starting profile (previously ISO 7637-2 test pulse 4)

  • Simulates supply voltage variation during and after cranking

Section 4.6.4 load dump test pulses A and B (previously ISO 7637-2 test pulses 5a and 5b

  • Simulates a discharged battery being disconnected whilst the alternator is generating charge. Test Pulse B is commonly termed “clipped load dump”.

ISO 7637-2:2011

Specifies test methods and procedures to ensure the compatibility to conducted electrical transients of equipment installed on passenger cars and commercial vehicles fitted with 12 V or 24 V electrical systems.

Austest Laboratories can generate the following for both 12 and 24V supplies:

Pulse 1

  • Simulates transients generated due to supply disconnection from inductive loads.

Pulse 2a

  • Simulates transients generated due to the sudden interruption of currents in a device connected in parallel with the DUT.

Pulse 2b

  • Simulates transients generated from DC motors acting as generators after the ignition is switched off.

Pulses 3a and 3b

  • Simulates transients which are generated as a result of switching processes. Pulse 3a are negative going transients. Pulse 3b are positive going transients.

Pulses 4, 5a and 5b

  • Now specified in ISO 16750-2.

ISO 10605:2008

Specifies the test methods necessary to evaluate immunity to electrostatic discharges of electronic modules intended for vehicle use. It applies to discharges in the following cases:

  • ESD in assembly;
  • ESD caused by service staff;
  • ESD caused by occupants.

This includes discharges applied directly to the DUT and also discharges to neighbouring parts of a vehicle which may indirectly affect the DUT after coupling into supply and signal lines.

Austest Laboratories can generate contact discharges up to ±15kV and air discharges up to ±25kV using the following discharge networks:

  • 150pF / 330Ω
  • 330pF / 330Ω
  • 150pF / 2kΩ
  • 330pF / 2kΩ
  • 150pF is specified for test points that can only be accessed outside a vehicle.
  • 330pF is specified for test points that can only be accessed within a vehicle
  • 330Ω simulates discharge of a human body through a metallic part (e.g. ring, key)
  • 2kΩ simulates discharge of a human body through the skin.

Contact Austest Labs for new requests covering Automotive EMC testing.

 

By Admin