Even if your technicians know how to test batteries, you can lose money and good batteries to an uncalibrated tester. An uncalibrated tester causes fleets to throw away good batteries for no reason other than a faulty tester.

The best way to examine your battery tester’s calibration is to look for patterns of recovery. In other words, take note when the tester repeatedly says batteries are bad. If the tester continues to read every battery as bad, it likely needs to be recalibrated.

Use a manual volt meter, multimeter and clip on ammeter to double-check your tester’s readings on the battery. If the voltage or amperage reads a higher or lower reading than the tester, you need to recalibrate

No battery tester is the same, and they will all require different calibration processes.

For example, the Carbon Pile tester requires technicians to use a digital multimeter to verify the voltage readings from batteries.  Remember to check the calibration with the tester at rest and also while applying a load to the battery.

The best way for fleets to save money and batteries is to check their battery testers in-house quarterly, and send testers to the manufacturer or a service location to be properly calibrated once a year.

Do you have questions about calibrating battery testers? Have you experienced problems with broken or uncalibrated battery testers? Would you like help with your battery program? We appreciate your comments below

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