With this tester battery condition is detected by three methods. He is responsible for all lead-acid batteries suitable (open, maintenance-free, AGM, GEL). The tester electronics ensure the batteries can be tested in the installed condition.

1 Voltage measurement:

Depending on the type of a battery can range between about 11.85 and 12.7 V like electricity, that is about 0.1 V corresponds to 10% of capacity. Therefore, only an accurate voltage measurement provides information about whether the battery can even be electrified.

2 Start capability (load test on the vehicle):

This patented method of measurement, the device measures the voltage drop in the battery at a startup. The further the voltage drops when the starter draws current, the worse the battery. It is an individual exercise test, as the battery is charged precisely with the flow, where it is exposed daily during tempering.

3 Measurement of the CCA:

The cold cranking amps (CCA = Cold Cranking Amps) is the power (current / amps), which may give a new, fully charged battery over a certain time at a certain temperature without a certain voltage is reached. The device compares this value with the entered desired data and information are thus as much cold cranking amps the battery can actually still exits.

The measured CCA is both voltage and temperature compensated. Independent of temperature and state of charge, the displayed value is therefore equal.

4 Alternator test:

After completing the battery test, the tester also provides information about the output from the generator voltage and rated the Diodenoberwelligkeit.

The AA500 has a printer port and can be retrofitted with the printer AATPR10.