Battery Tester B70
9
Traditional test method (1/2 CCA Load Test)
A deep discharge test simulating the demands imposed on a battery. Test the
ability to deliver a starter motor's cranking current requirements while
maintaining a terminal post voltage above a minimum standard.
Apply a load equal to 1/2 the CCA rating for 15 seconds and measure the
voltage drop. Compare the voltage to a voltage chart.
The battery state -of-charge must be 75% (12.4 v) to perform a 1/2 CCA test. If
the battery is below 75% state-of-charge, it must be charged before testing.
New Measurement Techniques:
Ohmic Measurement
Resistance Measurements(DC method)
Impedance Measurements(AC method)
Conductance Measurements(AC method)
Resistance Measurement
Resistance measurements can be performed by applying a load across the
cell/unit and measuring the step change in voltage and current. The Ohmic
value is calculated by dividing the change in voltage by the change in current.
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