Argus AA300 Manuel De L'utilisateur page 8

Cranking Performance Test
(AA300, AA400, AA500p)
The Cranking performance Test is the most
relevant and informative test for understanding
the performance of a starting battery, and
can be performed on batteries connected to
their starting load. If you are bench testing a
battery or testing a battery other than a starting
battery, ignore the Cranking performance Test
and rely on the Battery Life Test results for
battery performance information.
1. Turn off all accessory loads before starting
the engine (lights, fans, radios, etc.)
2. Crank the engine when prompted by the
symbol flashing on the display.
The analyzer will automatically sense engine
starting and will capture cranking performance
data and display the cranking performance
results. The Cranking performance Test screen
can be identified by 'CH', the abbreviation for
Cranking Health, in the upper left corner of the
display.
1 Cranking Health
2 Battery Voltage
3 Alarms / Prompts
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For accurate Cranking Health (CH) results,
it is not necessary that the engine actually
start. However, it is important that the
engine be turned over completely during
this test. If the engine does not fully start,
a complete alternator test is not possible.
Interpreting cranking Performance
Test Results
The Cranking Health is the actual cranking
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performance of the battery during that start
shown as a percentage (in the graphical
All manuals and user guides at all-guides.com
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AA400, AA500p
section of the display.) A result of 100%
Cranking Health is the starting performance
expected from a properly sized, fully
charged, new battery. A result of 0%
Cranking Health is a level of performance
that implies immanent starting failure.
If Cranking Health (not adjusted for
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temperature) is below 40% during normal
temperatures (10° - 30°C), expect cranking
failure if the temperature becomes cold
(< 0°C.) Consider replacing battery now in
advance of failure.
If battery temperature is very low, for
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example below -15°C, poor cranking
performance and CH (not adjusted for
temperature) are expected even for a
healthy battery. Replacing a battery may
not help in these conditions.
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Cranking performance and CH results are
dramatically affected by temperature.
i Cranking performance and CH results can
also be affected by a drained battery. If
SoC is below 75%, recharge the battery
and test again.
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Cranking performance and CH results
will be lower the first time an engine is
started after a period of rest. Cold engine
and lubrication temperatures present the
highest starting load. A warm engine will be
easier to start and CH values will be higher.
Use the lower value to inform your replace
battery decision.
Crank Failure Immanent
If CH = 0%, the failed battery symbol
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will be turned on and the analyzer will
beep three times. Immediate battery
replacement is advised.
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Charge and test again if there is a
temporary reason for poor starting
performance – such as accidental battery
discharge.
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