Diagram of measuring battery quality with a multimeter, which file to use for 12v

If you want to know the quality of a car battery, you can use instrument detection to judge the quality of the car battery, such as a multimeter. The voltage measured by the multimeter to the car battery can be used to know whether the battery is good or bad. The multimeter measures the battery quality. The steps are:

1. Prepare the multimeter and the battery to be tested;

2. Press the power button to turn on the multimeter;

3. Click the voltage test gear;

4 For the red test, connect the positive electrode of the battery first, and connect the black test wire to the negative electrode of the battery;

5. Observe the displayed value of the multimeter. If it is between 10.5 and 11.6v, it means there is no problem with the battery. If the battery voltage is between 9.6 and 10.5v, it means there is no problem with the battery, but the battery is insufficient. If the voltage is below 9.6v, there is a problem with the battery or the battery is seriously insufficient.

Which gear does the multimeter use for 12v

If the multimeter is to measure the DC power supply 12v, it should be placed on the DC 20v block. Use a digital multimeter to measure the voltage. First of all, it is necessary to distinguish whether the measured voltage is DC or AC. Turn the selector switch on the digital meter, and then adjust to the corresponding voltage properties. The scope will do. If you don't know the level of the measured voltage, you can use a multimeter to adjust to the maximum gear, such as 1000v, and then adjust to the most accurate gear based on the approximate value of the measured voltage.

The service life of a car battery is generally about three years, and some car owners may need to replace it in two years because of improper maintenance. Therefore, when the car owner parks the vehicle for a long time, it is best to power off the battery, and you can directly remove the negative wire, so as to avoid static leakage of the battery because the battery is not used for a long time. The battery power is too low and it is not charged in time, which will also damage the battery to a certain extent.