3
The charger measures the open circuit voltage of the battery. If the battery was not used
for at least two hours, then this is referred to as open circuit voltage.
1. Switch off engine and ignition, shed all loads
2. Establish connection to battery
3. All display elements on the display are activated. Depending on the type of charger,
the respective voltage(s) and/or symbol for the type of battery are displayed.
Test mode
General remarks
Testing the
battery open
circuit voltage
Testing battery
startability
6. After the open circuit voltage test, the charger switches automatically to the startabi-
lity test and awaits the start procedure
Battery ready for use Charge battery
100% 80% 50% 20% 0%
4. Charger measures battery open circuit voltage
5. Charger displays battery open circuit voltage for 15 seconds
7. Start engine
8. Charger checks battery voltage response during the starting procedure
9. Charger displays battery startability for 15 seconds
very good starting response
poor starting response
Once the charger has been connected to the battery, the following test phases run
automatically in sequence:
- Battery open circuit voltage test
- Battery startability test (only on chargers for motor vehicle applications)
- Alternator test (only on chargers for motor vehicle applications)
NOTE! All battery and generator test results are for information only and may
differ from the actual values. The charger checks the entire system. The results
are therefore to be seen as recommendations only.
WARNING! Risk of injury and damage from exposed, rotating vehicle parts.
When working in the vehicle’s engine compartment, take care that hands, hair,
items of clothing and charger leads do not come into contact with moving parts,
e.g. fan belt, fan, etc.
If there is no starting procedure after 30 seconds, the charger changes over automatical-
ly to the alternator test. If the starting procedure is not possible, charge (or check) the
battery.
Do not connect the charger to the mains supply during testing. In all tests, the charger
draws its supply from the battery being tested.
(only for chargers used
in vehicle applications)
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