CAR_BATTERY_TESTER_FOR_CRANKING_AMPS

Published:2009/6/16 4:39:00 Author:May | From:SeekIC

This circuit determines the cold cranking amps of a battery by firest discharging the surface charge, then checking the internal resistance. This gives a more realistic measurement than simply measuring the instantaneous drop in voltage with a load. A constant-current source draws 2.5A. Then, after one minute, a voltage drop measurement is made under load.



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