I ran across this video while looking to see what's new in load testing equipment. A couple of things... A dead battery should be charged before performing a load test. Secondly, I always rerate the battery instead of going by the CCA rating on the label. A battery may still be good enough, but may fall short of the rated output. 450 cca's versus 600 is still going to crank your Honda Civic. To do this, load the battery down to 9.6 volts and record the amps after 15 seconds. Doubling the amp reading will give you the CCA rating
Unfortunately the skill level of this technician is beginner level or less, since he is moving ahead with a battery load test on a battery that is not fully charged. One reason the battery could fail the load test is simply because it is in a discharged state. He also did not perform the test for the 15 seconds required. The BCI ( Battery Council Institute ) and SAE ( Society of Automotive Engineers ) states that a battery needs to be fully charged 12.60 Volts or higher before a load test is made. It also states the duration of the load test is 15 seconds, and that at the end of the 15 seconds the voltage is noted and must be above the 9.6 ( temperature compensating ). These test specifications have not changed in about 100 years. It would be good for every student as well as a refresher for the older Tecs to be reminded of this. Happy testing.
Electrons are negatively charged, and so are attracted to the positive end of a battery and repelled by the negative end. So when the battery is hooked up to something that lets the electrons flow through it, they flow from negative to positive.
I ran across this video while looking to see what's new in load testing equipment. A couple of things...
A dead battery should be charged before performing a load test.
Secondly, I always rerate the battery instead of going by the CCA rating on the label. A battery may still be good enough, but may fall short of the rated output. 450 cca's versus 600 is still going to crank your Honda Civic.
To do this, load the battery down to 9.6 volts and record the amps after 15 seconds. Doubling the amp reading will give you the CCA rating
Unfortunately the skill level of this technician is beginner level or less, since he is moving ahead with a battery load test on a battery that is not fully charged. One reason the battery could fail the load test is simply because it is in a discharged state. He also did not perform the test for the 15 seconds required. The BCI ( Battery Council Institute ) and SAE ( Society of Automotive Engineers ) states that a battery needs to be fully charged 12.60 Volts or higher before a load test is made. It also states the duration of the load test is 15 seconds, and that at the end of the 15 seconds the voltage is noted and must be above the 9.6 ( temperature compensating ). These test specifications have not changed in about 100 years. It would be good for every student as well as a refresher for the older Tecs to be reminded of this. Happy testing.
I have the same tester I push the load test it does nothing could be bad tester cables connected reads battery voltage
Shouldn't the arrow point towards the machine if you put the clamp on the positive? Current flows positive to negative, correct?
Electrons are negatively charged, and so are attracted to the positive end of a battery and repelled by the negative end. So when the battery is hooked up to something that lets the electrons flow through it, they flow from negative to positive.