What is ISO 7637 2?
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. It describes bench tests for both the injection and measurement of transients.
What are ISO pulses?
Pulse 1 describes the negative transient observed by electronics connected in parallel with an inductive load when the connection to the power supply is interrupted. Requirement: Pulse 1 must be repeated a minimum of 500 times.
What is load dump pulse?
ISO7637-2:2004 pulse 5 (load dump pulse) is designed to simulate the voltage surge produced by spinning alternators when the battery or some other significant load is accidentally disconnected.
What is lv124?
Overview • LV 124 is a quality and reliability test standard jointly established by German automotive manufacturers in 2013. . The standard consists of Part I: electrical requirements and tests and Part II: environmental requirements and tests. Applicable Products.
What is test pulse?
Pulse-testing utilizes a sensitive differential-pressure gauge at a responding well to measure and record the response generated by a series of flow rate changes (pulses) at an adjacent or pulsing well.
What is a load dump test?
This test is a simulation of load dump transient, occurring in the event of a discharged battery being disconnected while the alternator is generating charging current and with other loads remaining on the alternator circuit at this moment; the load dump amplitude depends on the alternator speed and on the level of the …
What is the use of dump load?
Use a diversion load (or “dump load”) to convert excess electrical energy generation from a solar, wind, or hydro power system into a more useful form of energy. The most common kind of diversion load is a water heating element.
What is LV standard?
Overview • LV 124 is a quality and reliability test standard jointly established by German automotive manufacturers in 2013. . The standard consists of Part I: electrical requirements and tests and Part II: environmental requirements and tests.
What’s the normal range of pulse?
The normal pulse for healthy adults ranges from 60 to 100 beats per minute. The pulse rate may fluctuate and increase with exercise, illness, injury, and emotions. Females ages 12 and older, in general, tend to have faster heart rates than do males.
What causes pulse 2A pulse in ISO 7637-2?
ISO 7637-2:2011 Pulse 2a Pulse 2a describes the positive voltage spike that may occur when current is interrupted to a circuit in parallel with the electronics being tested. If current is built up in the wiring harness, when a device suddenly stops sinking current, the energy stored in the wiring harness inductance may cause a voltage spike.
Is there a third edition of ISO 7637-2?
ISO 7637-2 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 3, Electrical and electronic equipment. This third edition cancels and replaces the second edition (ISO 7637-2:2004), which has been technically revised. It also incorporates the Amendment ISO 7637-2:2004/Amd.1:2008.
What are ISO 7637-2 and ISO 16750-2 transients?
ISO 7637-2 and ISO 16750-2 are the most common specifications encountered by engineers who design automotive electronics. These two specifications describe potentially destructive transients and the recommended test procedures to ensure that the electronics are suitably protected.
What is the minimum supply voltage for ISO 16750-2?
For 12V systems, the supply dips to 4.5V, and for 24V systems it dips to 9V. In ISO 16750-2, Usmin, the minimum supply voltage, is identified by Code A through Code E in Section 4.2 of the specification. These codes are reproduced below for easy reference.