Battery internal resistance tester (different from the basic principle of measuring resistors with multimeters, the value it accurately measures is milliohms, while the value accurately measured by multimeters is ohms; and digital multimeters only measure non-switching power supplies The resistance value of the target, and the internal resistance meter can measure the resistance value of the target without switching power supply, and can also measure the resistance value of the target with switching power supply, so the two are not equivalent) Use the resistance value of the internal resistance to distinguish the poor quality of the battery Depending on the situation, (generally speaking) the smaller the resistance value, the better the characteristics of the battery. Therefore, the method of testing the battery by accurately measuring the internal resistance is a good way to be faster and more stable. Let's take a look Learn about the specific operation process of the battery internal resistance tester.

According to the determination of batteries of different specifications, select the appropriate test frame (according to the user's regulations, we will give different test frames), only a general tester operation method is introduced in detail.

1. First place the equipment and test stand on a level workbench.

2. Insert the terminal block of the test stand into the power socket of the control panel of the instrument and fasten the screws.

3. Insert the power plug of the instrument into the 200V\/50Hz power plug.

4. First loosen the fixed screw at the bottom of the rolling plate, then adjust the position of the rolling plate according to the length of the battery under test, so that the distance between the four test pins is about 4mm lower than the length of the battery, and then clamp the rolling plate to fix it. screw.

5. Put the positive and negative levels of the battery into the positive and negative test pins respectively, so that the core of the battery is consistent with the center of the test pins, and the positive and negative points of the battery and the test pins are completely in contact.

6. Turn on the main power switch of the instrument, the reading value of the display will vibrate many times, which is a normal condition, and the reading value will automatically stabilize after about 100mS.

7. Press the switch button according to the size of the battery internal resistance to select a reasonable measurement range (if the range is too large or too small, the reading value will be inaccurate). Record the accurate reading value.

8. When the test is over, take out the battery according to the direction in which the battery was installed in the opposite direction.