ISO 7637 TEST
TURKAK Accredited Testing and Verification
STEST is accredited by the Turkish Accreditation Institution (TURKAK) and carries out its testing and verification activities in an independent, competent, and impartial manner in compliance with national and international standards.
ISO 7637-2 Bench Testing
ISO 7637-2 specifies bench test methods to verify the compliance of equipment installed on road vehicles with conducted electrical transients along supply lines—covering passenger cars and light commercial vehicles equipped with a 12 V electrical system, as well as commercial vehicles equipped with a 24 V electrical system. The standard also provides measurement methods for transient events and a fault mode severity classification for assessing immunity to such events. It applies to these road vehicles regardless of the propulsion system.
Purpose Objective
- To verify compliance with conducted electrical transients on vehicle supply lines.
- To enable measurement of transient events and evaluation of immunity to transient disturbances.
Test Scope Coverage
- Equipment installed on passenger cars and light commercial vehicles with a 12 V electrical system.
- Equipment installed on commercial vehicles with a 24 V electrical system.
- Applicability to these road vehicles regardless of propulsion system.
Technical Implementation Process
- Methods are defined for measuring transient emissions on supply lines and for testing immunity of devices to these transients.
- Bench tests are performed under laboratory conditions; certain methods may require the use of an artificial network.
- For immunity assessment against supply-line transient currents, a bench test method using a test pulse generator may be applied.
Application Areas Use
- Evaluation of equipment used on 12 V and 24 V electrical systems in road vehicles.
- Obtaining comparable results through laboratory bench testing.
ISO 7637-2 defines laboratory bench test methods for measuring transient emissions on supply lines and assessing the immunity of devices to transient events. Methods performed with a test pulse generator may not represent every type of transient that can occur in an actual vehicle environment.
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