ISO 7637-2 | 7637-3

ISO 7637-2 is a test standard developed by ISO (International Organization for Standardization) concerning electrical transient conduction along power supply lines in road vehicles. The purpose of this standard is to define test methods and procedures of equipment installed on passenger cars and commercial vehicles with 12 V or 24 V electrical systems to ensure their compatibility to conducted electrical transients. ISO 7637-2 defines the function performance status classification for the immunity to transients. It also specifies bench tests for both the injection and measurement of transients and applies to all types of road vehicles separate from the propulsion systems.

ISO 7637-3 concerns electrical transient transmission by capacitive and inductive coupling from lines other than supply lines. The purpose of this standard is to specify bench test methods to assess the immunity of devices under test (DUT) to transient pulses that are coupled to lines other than supply lines in road vehicles with 12 V or 24V electrical systems. There are three test methods described in ISO 7637-3, capacitive coupling clamp (CCC) method, direct capacitive coupling (DCC) method, and Inductive coupling clamp (ICC) method. During testing, the test pulses can replicate both fast and slow transient disturbances that can be caused by switching inductive loads and relay contact bounce.

Avalon Test Equipment carries a variety of test equipment for rent from top manufacturers (EM Test and Teseq) to meet both ISO 7637-2 and ISO 7637-3 requirements. Test With Confidence®.

ISO 7637-3 CCC TEST SETUP