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Introduction
The battery load tester is intended for checking the battery status of
12 V resp. 6 V lead-acid batteries with a capacity of at least 36 Ah. Furthermore
you can check the charging system the voltage of the battery under load.
Cold Cranking Ampere (CCA)
First determine the CCA for the battery in order to read the correct measuring
range on the scale of the battery load tester.
Cold cranking ampere (CCA) is the amount of current a battery can provide at
-18 °C (0° F) for the duration of 30 seconds.
The cold cranking ampere is often stated as "CCA" on the battery. If the CCA is
not stated on your battery, refer to the recommended values from the following
table:
Battery Capacity
5 – 14 Ah
20 – 40 Ah
52 – 70 Ah
74 – 80 Ah
95 – 110 Ah
Temperature Compensation
Correct readings depend on the battery temperature. To achieve correct readings
you have to perform temperature compensation if the temperature is below -7 °C.
Observe the stated CCA on the battery and decrease the CCA value by 50 Amps
(1 Step) if the temperature is -7 °C.
Example: The CCA of a battery is 360 A minus 100 A (2 Steps) if the temperature
is -18 °C (result 260 A). At -29 °C you have to reduce the CCA value from the
battery up to 150 A (3 Steps).
Battery Load Test
With the battery load test you can determine if the battery's capacity is sufficient
to start a motor vehicle even under adverse climatic conditions. While measuring,
the battery is loaded with approx. 100 A.
Using
Cold Cranking Amperes (EN)
15
30 – 140 A
120 – 330 A
320 – 630 A
450 – 740 A
570 – 920 A
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