Automotive Battery Tester, digital type
This tester is designed for automotive battery load voltage test, charging voltage test and starter motor test. It is very useful and can be used in vehicle's fault diagnosis and service.
BATTERY LOAD TEST
This test evaluates a battery's ability to crank an engine. The tester draws current from the battery while measuring its voltage level. The voltage level of a good battery will remains relatively steady under load, but a defective battery will show a rapid loss in voltage. Battery size (CCA rating) and temperature will affect test result-follow instruction carefully.
COLD TEMP. EFFECTS
Because of the battery's chemical nature, it will test lower when cold than when warm. For most accurate results, this effect should be compensated for when the battery's internal temp. is below 40℉ (4.4℃) . Assume internal battery's internal temperature to be the day's high-low average temperature.
CHARGING VOLTAGE TEST
This test enables the user to measure the output voltage of the alternator/regulator and check for undercharging or overcharging, which leads to poor battery performance and short life.
STARTER MOTOR TEST
This test identifies excessive starter current draw, which makes starting difficult and shortens battery life.