Page 142 - CTS - Mechanic Diesel - TP

MECHANIC DIESEL - CITS

TASK 3: Test the battery by open volt test using volt meter
1 Set the Digital voltmeter in DC 12 volt mode.
2 Connect the leads of multimeter to battery positive (+ve ) and negative (-ve) terminal.
3 Take the reading from the multi meter and record it.

Note: The voltage of fully charged battery should be 13.2 volts. if a battery goes below 12.2V, it
means it is 50% charged. If it goes below 11.9V, it is considered“discharged”. Recharge the battery
if necessary .

4 Check the voltage of battery after recharging.
Note: While checking of battery voltage after recharging the surface charge must be removed
before checking.

TASK 4: Test the battery using battery tester
1 Use an infrared temperature gauge to measure the temperature on the side of the battery and check that it is
within the test parameters.

Note: The battery electrolyte should be at room temperature, between 21°C and 27°C. A cold battery
shows a significantly lower capacity. Never test a sealed battery if its temperature is below 15°C. A
load test is performed only on a fully charged battery.

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CITS : Automotive - Mechanic Diesel - Exercise 8.2