User's Manual

Appendix A: Vehicle Installation Guide
73
instantaneous electrical current in terms of hundreds of cranking amps or
more) which leaves insufficient energy for other electrical equipment on
the vehicle. Therefore, the voltage supplied to all other electrical
equipment drops to a significantly lower level than what is normal. It is
only after such an instantaneous high demand of electrical power that the
voltage level on the vehicle returns to normal. The diagram below
demonstrates the brown-out phenomenon during the engine’s startup.
Transient voltages, sometimes known as spikes, are very noticeable
positive or negative voltage changes over a short period of time. Such
voltage fluctuations may be occasional or may be periodic. They are
typically caused by interference from electrical-mechanical components
in a vehicle (such as alternators, electric windows and door locks, light
switches, loose or corroded connectors or battery terminals, etc.), or even
from additional electrical equipment connected to the vehicle’s electrical
power system. Without treatment, sharp spikes are a potential threat to
your K530 as well as other electrical equipment on the vehicle. The
diagram below shows some standardized examples of automotive
voltage transients (ISO-7637-2):