Can I measure the batterys actual CCA using conductance?
The actual SAE J537 Cold Cranking Test is a manufacturing process control test applicable only on new, fully charged batteries. It does not produce an actual value of cold cranking amps (CCA), but is a pass/fail test based on the battery’s CCA test rating. The CCA rating is the discharge load, in amps, that a new, conditioned battery can supply for 30 seconds at 0°F/-18°C while maintaining a voltage of 1.2 volts per cell (7.2 volts per battery) or higher. Thus, the CCA test sets the minimum power requirement for a new battery as rated, which means that a battery rated at 500 CCA must measure 7.2 volts or above for 30 seconds when a load of 500 amps is applied at 0°F/ -18°C. In automotive applications, the conductance of a new, fully charged battery under normal conditions can be directly related to its rated CCA, the industry gauge of starting power. Therefore, conductance can be translated into working units of CCA so that the power level of a battery can be compared to its cranking r
